Central Telephone Company INTRALATA SERVICES TARIFF of Texas d/b/a CenturyLink Title Page (C) First Revised Sheet 1 Cancels Original Sheet 1

INTRALATA SERVICES TARIFF

Schedule of Rates and Charges Together

With Rules and Regulations Applicable To

Services Provided In The Territory Served

By This Company Within The State of Texas

ISSUED: October 21, 2009 EFFECTIVE: November 20, 2009 Central Telephone Company INTRALATA SERVICES TARIFF Of Texas d/b/a CenturyLink Adoption Notice (C) First Revised Sheet 1 Cancels Original Sheet 1

INTRALATA SERVICES TARIFF

ADOPTION NOTICE

Effective July 28, 2009, Central Telephone Company of Texas registered the fictitious name (N) CenturyLink. Effective November 20, 2009, Central Telephone Company of Texas d/b/a Embarq, began operating under the name CenturyLink. As such, Central Telephone Company of Texas d/b/a CenturyLink hereby adopts, ratifies, and makes its own, in every respect as if the same had been originally filed by it, all schedules, rules, notices, concurrences, schedule agreements, divisions, authorities or other instruments whatsoever, filed with the Public Utility Commission, State of Texas, by or adopted by Central Telephone Company of Texas d/b/a Embarq between June 5, 2006 and November 19, 2009.

By this notice, Central Telephone Company of Texas d/b/a CenturyLink also adopts and ratifies all supplements or amendments to any of the above schedules, etc., which Central Telephone Company of Texas d/b/a Embarq has heretofore filed with said Commission. (N)

Effective June 5, 2006, Central Telephone Company of Texas began operating under the name Embarq. As such, Embarq hereby adopts, ratifies, and makes its own, in every respect as if the same had been originally filed by it, all schedules, rules, notices, concurrences, schedule agreements, divisions, authorities or other instruments whatsoever, filed with the Public Utility Commission of Texas, by Central Telephone Company of Texas.

By this notice it also adopts and ratifies all supplements or amendments to any of the above schedules, etc., which Central Telephone Company of Texas has heretofore filed with said Commission.

ISSUED: October 21, 2009 EFFECTIVE: November 20, 2009 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas, dba CenturyLink Application of Tariff 2nd Revised Sheet 1 Cancels 1st Revised Sheet 1

APPLICATION OF TARIFF

This tariff contains regulations, rates and charges applicable to IntraLATA Services, including Long Distance Message Telecommunications Service, Private Line Service, Dataphone Digital Service and (D) Digital Link Service, furnished or made available by Central Telephone Company of Texas, Inc., () over service components located wholly within or partly within the State of Texas, between two or more service points with Access and Transport Areas (LATAs) in the State of Texas, where the respective rate centers of such service points in said State, and to mobile telephone service tinder the provisions as set forth in this tariff.

The rates and services provided in this tariff are regulated and approved by the Public Utility Commission of Texas (Commission) in compliance with the Public Utility Regulatory Act and the rules adopted by the Commission.

Any change in rates or regulations authorized by the legally constituted authorities acts as a modification of all contracts to that extent without further notice.

Whenever reference is made in this tariff to other intrastate Texas tariffs of Central Telephone Company of Texas, Inc. (Centel), the reference is to the tariffs in force as of the effective date of this tariff, and to amendments thereto and successive issues thereof.

EXPLANATION OF SYMBOLS

The following symbols will be used in the right-hand margins of each tariff page to indicate changes made on the sheets:

(C) Indicates a Change in Regulations

(D) Indicates Discontinued Rate or Regulation

(E) Indicates Correction of an Error Made During a Revision

( I ) Indicates a Rate Increase

(M) Indicates a Move of Text from one page to another but no Change in Text, Rate or Regulation.

(N) Indicates a New Rate or Regulation

(R) Indicates a Rate Reduction

(T) Indicates a Change in Text but no Change in Rate or Regulation

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Section Trademarks Service Marks of Texas dba CenturyLink First Revised Sheet 1 (T) Cancels Original Sheet 1

Trade Names, Trademarks and Service Marks Used in this Tariff (T)

Below is a list of trade names, trademarks and/or service marks for services which are offered in this (T) Tariff. These trade names, trademarks and/or service marks are owned by Central Telephone Company of Texas dba CenturyLink and are used by CenturyLink, Inc. or a subsidiary of CenturyLink, Inc. with express permission. Trademark and service mark designations will not be listed hereafter in the Tariff. However, the laws regarding trademarks and service marks will still apply. Trademarks and service marks that are owned by CenturyLink, Inc. or a subsidiary of CenturyLink, Inc. cannot be used by another party without authorization. (T)

(D) (D) CENTURYLINK (N) CENTURYLINKTM CENTURYLINKSM (N)

ISSUED: June 14, 2010 EFFECTIVE: July 14, 2010 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Index Original Sheet 1

INDEX

SECTION 1

REGULATIONS SHEET

1. Scope ...... 1 2. Availability of Service...... 1 3. Limitations on Duration of Connections ...... 1 4. Liability ...... 2 5. Use of Service ...... 3 6. Abuse and Fraudulent Use ...... 3 7. Unlawful Purposes ...... 3 8. Obligation of the Customer ...... 3 9. Payment for Service ...... 4 10. Billing and Collection of Charges ...... 5 11. Termination of Service for Cause ...... 5 12. Advance Payments ...... 5 13. Deposits ...... 6-7 14. Definitions ...... 8-11 15. Application of Construction Charges ...... 12 16. Distance Learning and Information Sharing Program Discounts ...... 12 17. Time and Charges ...... 12 18. Connections of Terminal Equipment and Communications Systems ...... 12 19. Method of Applying Rates ...... 12-13

SECTION 2

LONG DISTANCE SERVICES

1. Two-Point Service ...... 1-6 2. Special Reversed Charge Long Distance Message Telecommunications Service ...... 7 3. Special Reduced Rates ...... 8 4. Mobile Long Distance Message Telecommunications Service ...... 8

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Index Original Sheet 2

INDEX

SECTION 3

OPTIONAL CALLING PLAN SHEET

1. General ...... 1 2. Optional Calling Plan - Descriptions ...... 2 3. Rates ...... 3

SECTION 4

CONSUMER SENSE LOCAL TOLL SERVICE

1. General ...... 1 2. Regulations ...... 1 3. Applicability ...... 1 4. Rates and Charges ...... 2 5. Business Sense Local Toll Service ...... 2-3

SECTION 5

SIMPLY FIVE

1. General ...... 1 2. Regulations ...... 1 3. Applicability ...... 1 4. Rates and Charges ...... 2

SECTION 6

RESERVED FOR FUTURE USE

SECTION 7

RESERVED FOR FUTURE USE

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section1 Original Sheet 1

REGULATIONS 1. Scope

1.1 Long Distance Message Telecommunications Service (LDMTS) is that of furnishing facilities for telecommunications between service points in different local service areas in accordance with the regulations and system of charges specified in this tariff. The message charges specified in this tariff are in payment for all service furnished between the calling and called service points.

1.2 The charges specified in this tariff do not contemplate work being performed by Centel employees involved at a time when overtime wages apply, due to the request of the customer, nor do they contemplate work once begun being interrupted by the customer. If the customer requests that overtime labor be performed or interrupts work once begun, an additional charge, based on the additional costs involved applies.

1.3 Centel does not undertake to transmit messages but furnishes the use of its facilities to its customers for communications. 2. Availability of Service

2.1 In case a shortage of facilities exists at any time either for temporary or protracted periods, the establishment of LDMTS shall take precedence over all others.

2.2 At the option of Centel, Billed Number Screening will be furnished where facilities are available to control instances of fraud associated with Billed to Third Party, station-to station or person-to-person collect services or in response to a customer request. 3. Limitations on Duration of Connections

Centel reserves the right to limit the duration of connections when necessary because of a shortage of facilities caused by emergency conditions.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 2 REGULATIONS

4. Liability

4.1 In view of the fact that the customer has exclusive control of the communications over the facilities furnished him/her by Centel, and of the other uses for which facilities may be furnished him/her by Centel, and because of unavoidability of errors incident to the services and to the use of such facilities of Centel, the services and facilities furnished by Centel are subject to the terms, conditions and limitations specified in 4.2, 4.3, 4.4, 4.5, 4.6 and 4.7 following.

4.2 Centel's failure to provide LDMTS under this tariff shall be excused by labor difficulties, governmental orders, civil commotions, acts of God and other circumstances beyond Centel's reasonable control.

4.3 Centel's liability, if any, for its gross negligence or willful misconduct is not limited by this tariff. With respect to any other claim or suit, by a customer or any others, for damages associated with any aspect of the provision of service (including failure to reach a called service point), Centel's liability, if any, shall not exceed an amount equal to the initial period charge applicable for such message to the called service point. This liability shall be in addition to any amounts that may otherwise be due to the customer under this tariff as a billing adjustment. However, any such mistakes, omissions, interruptions, delays, errors, or defects in transmission of service which are caused or contributed to by the negligence or willful act of the customer, authorized user, or joint user, or which arise from the use of customer premises equipment shall not result in the imposition of any liability whatsoever upon Centel.

4.4 The customer indemnifies and saves Centel harmless against claims for libel, slander, or infringement of copyright from the material transmitted over its facilities; against claims for infringement of patents arising from combining with, or using in connection with, facilities of Centel, apparatus and systems of the customer; and against all other claims arising out of any act or omission of the customer in connection with facilities provided by Centel.

4.5 Centel will not be liable for any consequential, incidental or indirect damages for any cause of action, whether in contract or tort. Consequential, incidental, and indirect damages include, but are not limited to, lost projects, lost revenues, and loss of business opportunity, whether or not Centel was aware or should have been aware of the possibility of these damages.

4.6 When the facilities of other local exchange companies (LECs) are used in establishing connections to points not reached by Centel's facilities, Centel is not liable for any act or omission of the other LECs.

4.7 Centel will make reasonable efforts to cure any material failure to provide service caused solely by year 2000 defects in Centel’s hardware, software or systems. Due to the interdependence among telecommunications providers and the interrelationship with non-Centel processes, equipment and systems, Centel is not responsible for failures caused by circumstances beyond its control including, but not limited to, failures caused by: (1) the Customer (2) other telecommunications providers; or (3) customer premises equipment. In addition, Centel does not ensure compatibility between Centel and non-Centel services used by the Customer.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 3 REGULATIONS

5. Use of Service

The service is provided for use by the customer and may be used by others, when so authorized by the customer, providing that all such usage shall be subject to the provisions of this tariff.

6. Abuse and Fraudulent Use

The service is furnished subject to the condition that there will be no abuse or fraudulent use of the service. Abuse or fraudulent use of service includes:

6.1 The use of service or facilities of Centel to transmit a message or to locate a person or otherwise to give or obtain information without payment of the charge applicable for service;

6.2 The obtaining, or attempting to obtain, or assisting another to obtain or to attempt to obtain LDMTS, by rearranging, tampering with, or making connection with any facilities of Centel, or by any trick, scheme, false representation, or false credit device, or by or through any other fraudulent means or device whatsoever, with intent to avoid the payment, in whole or in part, of the regular charge for such service;

6.3 The use of service or facilities of Centel for a call or calls anonymous or otherwise, if in a manner reasonably to be expected to frighten, abuse, torment, or harass another;

6.4 The use of profane or obscene language;

6.5 The use of the service in such a manner as to interfere unreasonably with the use of the service by one or more other customers.

7. Unlawful Purposes

The service is furnished subject to the condition that it will not be used for an unlawful purpose.

8. Obligation of the Customer

8.1 The calling party shall establish his identity in the course of any communication as often as may be necessary.

8.2 The calling party shall be solely responsible for establishing the identity of the person or persons with whom connection is made at the called service point or service points.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 4 REGULATIONS

9. Payment for Service

The customer is responsible for payment of all charges for services furnished the customer, including charges for services originated or charges accepted at the customer's service point.

A one-time penalty as allowed per P.U.C. SUBST. R. §26.27(a) will be applicable on any bill not received by Centel or at Centel's authorized payment agency by the next bill date. For purposes of applying the penalty, the due date should be extended to the first following business day if it would otherwise fall on a weekend or holiday. No penalty shall be assessed on federal, state, or local government bills. The penalty shall not be applied to any balance to which the penalty was applied in a previous billing. The one-time penalty shall only apply on undisputed amounts or if the dispute is resolved in favor of Centel.

If billing for Centel's utility services are found to differ from Centel's tariffed rates, or if Centel fails to bill the customer for such services, a billing adjustment will be calculated by Centel. If the customer is due a refund, an adjustment shall be made for the entire period of the overcharges. If an overcharge is adjusted by Centel within three billing cycles of the bill in error, interest is not applicable. However, if an overcharge is not adjusted by Centel within three billing cycles of the bill in error, interest shall be applied to the amount of the overcharge as specified in P.U.C. SUBST. R. §26.27(a). The rate of interest is set annually by the Commission for a twelve-month period and is based on an average of prime commercial paper rates for the previous twelve- month period. (1)

(1) The rates of interest to be paid on customer deposits in accordance with Texas Utilities Code Annotated §183.003 (Vernon 1998), and overbillings or underbillings in accordance with P.U.C. SUBST. R. §26.27(a), are established annually on December 1 for the subsequent calendar year by the Commission, as reflected in the Order Setting Interest Rates included in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 5

REGULATIONS

10. Billing and Collection of Charges

The charges for messages and chargeable reports are due when billed and are billed and collected by Centel or the LEC from whose service point the messages were sent paid or at whose service point the messages were received collect.

11. Termination of Service for Cause

Service may be discontinued for nonpayment of any sum due Centel, or for a violation of any of the conditions governing the furnishing of service. The due date of the bill shall not be less than 16 days after issuance. If the bill is not paid by the due date, Centel may discontinue service after 10 days written notice to the customer in accordance with P.U.C. SUBST. R. §26.28(b) and (h).

12. Advance Payments

Applicants for LDMTS, whose financial responsibility is not a matter of general knowledge or who are not connected in a substantial way with a firm, corporation or other concern of established credit, may be required to make advance payments of at least one month's estimated charges.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 6

REGULATIONS

13. Deposits

Centel, in order to safeguard its interests, may require an applicant or a present customer to make a deposit of an amount not to exceed two months exchange service charges plus two months estimated long distance service charges to be applied in payment of any unpaid charges for exchange or long distance service which may be rendered. In accordance with P.U.C. SUBST. R. §26.24(f), the required deposit may be based on long distance service charges of the interexchange carriers only in those instances where Centel's tariff provided for billing for an interexchange carrier. Simple interest is set annually by the Commission.(1) Payments of the interest to the customer shall be annually if requested by the customer, or at the time the deposit is returned or credited to the customer's account. The deposit shall cease to draw interest on the date it is returned or credited to the customer's account.

An initial deposit may be required from residential customers if the customer has more than one occasion during the last 12 consecutive months of service in which a bill for a utility service was paid after becoming delinquent or if the customer's service was disconnected for nonpayment, in accordance with P.U.C. SUBST. R. §26.24(c)(2).

If the residential applicant has been a customer of any utility for the same kind of service within the last two years and is not delinquent in payment of any such utility service account, and during the last 12 consecutive months of service did not have more than one occasion in which a bill for such utility service was paid after becoming delinquent and never had service disconnected for nonpayment, applicants are encouraged to obtain a letter of credit history from their previous utility, and utilities are encouraged to provide such information with final bills, in accordance with P.U.C. SUBST. R. §26.24(a)(2).

An applicant for service or a present customer, may satisfy a deposit requirement by providing a Contract of Guaranty in an amount not less than the requested deposit from a present customer acceptable to Centel. The guaranty contract shall be on a form provided by Centel which shall include Centel's right to transfer charges from a defaulted bill to the customer, from whom a deposit or a Contract of Guaranty was required, to the Guarantor's account or accounts and the further right to suspend the Guarantor's service pursuant to Subsection 9, Payment for Service, of this tariff.

(1) The rates of interest to be paid on customer deposits in accordance with Texas Utilities Code Annotated §183.003 (Vernon 1998), and overbillings or underbillings in accordance with P.U.C. SUBST. R. §26.27(d) and (e), are established annually on December 1 for the subsequent calendar year by the Commission, as reflected in the Order Setting Interest Rates included in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 7 REGULATIONS

13. Deposits (Continued)

The fact that a deposit has been made or a guaranty provided, shall in no way relieve the customer from complying with Centel's regulations as to the prompt payment of bills, nor constitute a waiver or modification of the regular practices of Centel providing for the temporary suspension of service or the termination of the service contract for nonpayment of bills.

Service may be discontinued for failure to furnish a suitable deposit when conditions appear to require Centel to have such credit protection. Initial deposits may be required of applicants or existing customers.

In accordance with P.U.C. SUBST. R. §26.24(d)(1) and (2), when a deposit is required on an existing account, the following time frames apply:

Deposits Required During the First Twelve Months of Service Based on Usage

Actual usage must be three times the estimated usage (or three times average usage of most recent three bills) and current usage must exceed $150 and 150% of the security held before a new deposit is requested. If a deposit is requested, the customer may be required to pay the deposit within 10 days after issuance of written notice of termination and requested deposit, or, in lieu of the deposit, the customer may elect to pay the current usage within 10 days after issuance of written notice of termination and requested deposit.

Deposit Requirements Based on Billing

Commercial

Actual billings of a commercial customer must be at least twice the amount of the estimated billings and a suspension notice has been issued on a bill within the previous 12-month period before a new deposit can be requested. If a deposit is requested, the customer may be required to pay the new deposit within 15 days after issuance of written notice of termination and requested deposit, or, in lieu of the deposit, the customer may elect to pay the current bill by the due date of the bill, provided the customer has not exercised this option in the previous 12 months.

Residential

Actual billings of a residential customer must be at least twice the amount of the estimated billings after two billing periods, and a suspension notice has been issued on a bill within the previous 12-month period before a new deposit can be requested. If a deposit is requested the customer may be required to pay the new deposit within 15 days after issuance of written notice of termination and requested deposit, or, in lieu of the deposit, the customer may elect to pay the current bill by the due date of the bill, provided the customer has not exercised this option in the previous 12 months.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 8

REGULATIONS

14. Definitions

Accessories - Devices which are mechanically attached to, or used with, the facilities furnished by Centel and which are independent of, and not electrically, acoustically or inductively connected to, the conductors in the communications path of the telecommunications system.

Bill to Third Party - A billing arrangement by which a message may be charged to an authorized service point as determined by Centel other than the service point originating the call or the service point where the call is terminated.

Billed Number Screening - The term "Billed Number Screening" denotes an arrangement whereby at time of call originations, Bill to Third Party station-to-station or person-to-person collect calls are screened for customer preauthorized or Centel-directed nonacceptance.

Call Forwarding - A feature whereby a call placed to a telephone number in one exchange is automatically forwarded via the long distance message telecommunications network to a customer designated telephone number in another exchange. Provision of Call Forwarding is subject to the availability of service components.

Calling Card - A billing arrangement by which a message may be charged to an authorized telecommunications calling card number.

Collect Call - A billing arrangement by which the charge for a call may be reversed provided the charge is accepted at the called service point. A collect call may be billed to a calling card or third party number. In the case of a public or semi-public coin telephone the charges must be billed to a calling card or third party number, or the call may be reoriginated from the called service point.

Communications Systems - Channels and other facilities which are capable, when not connected to the telecommunications network, of two-way communications between customer premises equipment and/or Centel service points.

Composite Data Service - The combined use of terminal and data switching equipment provided by a Composite Data Service Vendor with the use of telecommunications services of Centel to perform data switching for others.

Composite Data Service Vendor - A customer that has been certified by the proper state or municipal regulatory body and/or the Federal Communications Commission pursuant to Section 214 of the Communications Act of 1934, as amended, to acquire and operate facilities to perform data switching for others. A customer shall be classified as a Composite Data Service Vendor only with respect to use of those exchange services which are utilized for the provision of composite data service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 9

REGULATIONS

14. Definitions (Continued)

Connecting Arrangement – The equipment provided by the customer to accomplish the direct electrical connection of customer premises equipment with the facilities of Centel.

Customer - The person, firm or corporation which orders service and is responsible for the payment of charges and compliance with the regulation of Centel.

Customer Premises Equipment - Devices, apparatus and their associated wiring, provided by a customer, which are used with the services furnished by Centel.

Data Access Arrangement - A protective connection arrangement for use with network control signaling units, or in lieu of the connection arrangement, an arrangement to identify a serving office line and protective service components and procedures to determine compliance with criteria set forth in Section 15 of the General Customer Services tariff.

Data Switching - When used in connection with composite data service, denotes the switching of data (nonvoice) messages by the interchange, controlling and routing of data messages via communications facilities, wherein the information content of the message remains unaltered.

Direct Electrical Connection - A physical connection of the electrical conductors in the communications path.

Exchange Access Line (EAL) - A telephone facility which permits access to and from the customer's premises and the telephone exchange network point. A telephone exchange network point is also known as a serving office.

Initial and Additional Period - The initial period denotes the interval of time allowed at the rate specified for connection between given points. The additional period denotes the unit of time used for measuring and charging for time in excess of the initial period.

IntraLATA - LDMTS where service point locations are all within the same LATA.

Local Access and Transport Area (LATA) - Denotes a geographic area established for the administration of telecommunications service. It encompasses designated local operating telephone company exchanges which are grouped to serve common social, economic and miscellaneous purposes.

Network Control Signaling - The transmission of signals used in the telecommunications system which perform functions such as supervision (control, status and charging signals), address signaling (e.g., dialing), calling and called number identification, audible tone signals (call progress signals indication reorder or busy conditions, alerting, coin denominations, coin collect and coin return tones) to control the operation of switching machines in the telecommunications system.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 10

REGULATIONS

14. Definitions (Continued)

Network Control Signaling Unit - The terminal equipment furnished for the provision of network control signaling.

Network Interface - That point of connection between Centel communications facilities and terminal equipment, protective apparatus or wiring at a customer's premises. The Centel-installed facilities at, or constituting, the point of interconnection shall consist of wire or a jack conforming to subpart F of Part 68 of the FCC Rules.

Patron - When used in connection with composite data service, denotes a subscriber to the data switching services of a Composite Data Service Vendor.

Person-to-Person - A service where the person originating the call specifies to the Centel operator a particular person to be reached, a particular mobile service point to be reached through a Mobile Telephone Service attendant, or a particular station, department or office to be reached through a PBX attendant.

- When, after the service point, mobile radio system, or PBX called has been reached and while the connection remains established, the person originating the call requests or agrees to talk to any person other than the person specified, or to any other person or mobile service point, or to any other station, department or office reached through a PBX attendant, the classification of the call remains person-to-person.

- When the person originating the call wishes arrangements made in advance with a particular party or service point for the establishment of a connection at a specified time (appointment call) the call is classified as person-to-person.

- Centel does not undertake, in connection with person-to-person service, to bring to a service point a called person who cannot be reached at a service point connected to the telecommunications network.

Point of Interconnection - See Network Interface.

Service Point - Denotes the point of interconnection on the customer's premises where channels provided by or furnished to the customer are terminated for connection to customer premises equipment.

Station - The network control signaling unit, DATAPHONE data set or other equipment at the customer's premises which enables the customer to establish the communications connection to effect communications through such connections; also denotes a termination of an individual exchange line or PBX trunk provided in accordance with the provisions of this tariff, in Centel switching equipment located in an exchange foreign to the exchange in which the customer is located.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 11

REGULATIONS

14. Definitions (Continued)

Station-to-Station - A service where the person originating the call, dials the telephone number desired or gives to the Centel/agent operator the telephone number of the desired service point, Mobile Telephone Service, PBX or PBX station which is reached directly rather than through a PBX attendant, or gives only the name and address under which the number of the desired service point, Mobile Telephone Service, or PBX is listed, and does not specify a particular person to be reached, nor a particular mobile station to be reached, nor a particular station, department or office to be reached through a PBX attendant.

- Three classes of station-to-station services are offered as follows:

"Dial Station-to-Station" is that station-to-station service where the person originating the call, from other than a public or semi-public coin telephone, dials the telephone number desired and the call is completed without the assistance of a Centel/agent operator and the message is not billed to a number other than the originating number. Dial Station-to-Station service also includes: (1) when an operator records the originating telephone number where no automatic recording equipment is available; (2) when an operator reaches the called telephone number where facilities are not available for dial completion; (3) when an operator places a call for a calling party who identifies himself as being handicapped and unable to dial the call because of his handicap; and (4) when an operator re-establishes a call which has been interrupted after the called number has been reached.

"Dial Calling Card Station-to-Station" is that station-to-station service where the person originating the call, including from a public or semi-public coin telephone, dials zero or a specified 800 number, then the telephone number desired and the message is completed without the assistance of a Centel/agent operator and is billed, where automatic billing equipment is available, to an authorized telecommunications calling card. Dial Calling Card Station-to-Station service also includes: (1) when an operator records the calling card where no automatic recording equipment is available; (2) when a Centel/agent operator reaches the called telephone number and records the calling card number where facilities are not available for dial completion; (3) when a Centel/agent operator places a calling card call for a calling party who identifies himself as being handicapped and unable to dial the call because of his handicap; and (4) when a Centel/agent operator reestablishes a dial calling card call which has been interrupted after the called number has been reached. This class of service involves no other operator services except those necessary to complete the above described calls.

"Operator Station-to-Station" is that station-to-station service other than Dial Station-to-Station and Dial Calling Card Station-to-Station. Operator Station-to-Station includes station-to-station service originating at a public or semi-public telephone, except for those public or semi-public telephone calls that are Dial Calling Card Station-to-Station as described above.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section1 Original Sheet 12

REGULATIONS

15. Application of Construction Charges

When special construction for individual customers is necessary, special construction charges may apply as set forth in Section 5 of the General Customer Services Tariff.

16. Distance Learning and Information Sharing Program Discounts

Upon submission of an affidavit that complies with the requirements of P.U.C. SUBST. R. §26.141 and HB2128, an educational institution or library may obtain a 25 percent discount on the tariffed rate for any tariffed service that is used predominantly for distance learning or information sharing programs.

"Distance learning" means instruction, learning and training that is transmitted from one site to one or more sites by telecommunications services that are used by an educational institution predominantly for such instruction learning or training, including video, data, voice and electronic information.

"Educational institution" means and includes: (a) accredited primary or secondary schools owned or operated by state and local governmental entities or private entities; (b) institutions of higher education as defined by Section 61.003, Education Code; (c) private institutions of higher education accredited by a recognized accrediting agency as defined by Section 61.003 (13), Education Code; (d) the Central Education Agency, its successors and assigns; (e) regional education service centers established and operated pursuant to Sections 11.32 and 11.33, Education Code; and (f) the Texas Higher Education Coordinating Board, its successors and assigns.

"Library" means a "public library" or "regional library system" as those terms are defined by Section 441.122, Government Code, or a library operated by an institution of higher education or a school district.

17. Time and Charges

Time and charges on long distance messages may be quoted upon request from the customer. Name association with time and charge details will be provided where facilities permit. Centel reserves the right to determine the facility used where there are multiple facilities.

18. Connections of Terminal Equipment and Communications Systems

Terminal equipment and communications systems may be connected at the customer's premises to LDMTS furnished by Centel where such connections are made in accordance with the provisions of Section 15 of the General Customer Services Tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 13

REGULATIONS

19. Method of Applying Rates

19.1 LDMTS rates between points (cities, towns or localities) are based on the air line distance between rate centers. In general, each point is designated as a rate center; certain small towns or localities are adjacent rate centers with which they are closely associated for communication purposes or by community of interest.

19.2 For the purpose of determining air line mileages, vertical and horizontal grid lines have been established across the Centel States and Canada. The spacing between adjacent vertical grid lines and between horizontal grid lines represents a distance of one coordinate unit. This unit is the square root of 0.1, expressed in statute miles. A vertical (V) and a horizontal (H) coordinate is computed for each rate center from its latitude and longitude location by use of appropriate map projection equations. A pair of V-H coordinates locates a rate center, for determining air line mileages, at a particular intersection of an established vertical grid line with an established horizontal grid line. The distance between any two rate centers is the air line mileage computed as explained in 19.3, following, with fractional miles being considered full miles.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 1 Original Sheet 14

REGULATIONS

19. Method of Applying Rates (Continued)

19.3 Determination of Air Line Mileages

To determine the rate distance between any two rate centers proceed as follows:

(A) Obtain the "V" and "H" coordinates for each rate center.

(B) Obtain the difference between the "V" coordinates of the two rate centers. Obtain the difference between the "H" coordinates.

Note: The difference is always obtained by subtracting the smaller coordinate from the larger coordinate.

(C) Divide each of the differences obtained in (B) by three, rounding each quotient to the nearer integer.

(D) Square these two integers and add the two squares.

If the sum of the squares is greater than 1777, divide the integers obtained in (C) by three and repeat step (D). Repeat this process until the sum of the squares obtained in (D), is less than 1778.

(E) The number of successive divisions by three in steps (C) and (D) determines the value of "N". Multiply the final sum of the two squares obtained in step (D) by the multiplier specified in the following table for this value of "N", preceding:

Minimum N Multiplier Rate Mileage

1 0.9 ---- 2 8.1 41 3 72.9 121 4 656.1 361 5 5,904.9 1,081 6 53,144.1 3,241

(F) Obtain square root of product in (E) and, with any resulting fraction, round up to next higher integer. This is the message rate mileage except that when the mileage so obtained is less than the minimum rate mileage shown in (E), preceding, the minimum rate mileage corresponding to the "N" value is applicable.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 2 Original Sheet 1

LONG DISTANCE SERVICES 1. Two-Point Service 1.1 Classes of Service Service is offered on a Dial Station-to-Station, Dial Calling Card Station-to Station, Operator Station- to-Station or on a Person-to-Person basis. Day, Evening, Night and Weekend rates apply to all classes of service excluding the service charges specified in 1.4.2, as follows: 1.1.1 All Classes of Service

Mon. Tue. Wed. Thu. Fri. Sat. Sun. 8:00 AM Night & Weekend to Day Rate Period Rate Period *5:00 PM Full Rate 40% Discount Night & Evening 5:00 PM Evening Rate Period Weekend Rate to 25% Discount Rate Period *11:00 PM Period 25% 40% Dis. Dis. 11:00 PM Night and Weekend Rate period to 40% Discount *8:00 AM * To, but not including

1.1.2 The time (at the calling service point) at which connection is established governs. 1.2 Reversal of Charges (Collect Calls) 1.2.1 Charges for Operator Station-to-Station and Person-to-Person telephone messages may, upon request, be reversed, that is, charged against the called telephone, provided the charges are acceptable at the called telephone. 1.2.2 The regularly established Operator Station-to-Station and Person-to Person rates apply.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 2 Original Sheet 2

LONG DISTANCE SERVICES

1. Two-Point Service (Continued)

1.3 Time of Day

The time when connection is established, as provided in 1.4, following, determined in accordance with the time - standard or daylight savings - legally or commonly in use at the location of the rate center of the calling service point, determines whether Day, Evening, Night or Weekend rates apply. This rule applies whether the message is sent paid or collect.

1.4 Rates

The following rates apply to intrastate intraLATA business between service points within the designated LATAs in the State of Texas:

1.4.1 Usage - All Classes of Service

(A) Initial period rates indicated in the rate table in 1.6, following, are for connections of one minute or any fraction thereof.

(B) All additional minute rates indicated in the rate table in 1.6, following, are for each additional minute or any fraction thereof, that the connection continues beyond the initial period.

(C) When the connection is established in one rate period and ends in another, the rate for each rate period applies to the portion of the connection occurring within that rate period. In the event that a minute of use is split between two rate periods, the rate in effect at the start of that minute applies.

(D) Discounts for the Evening, and Night and Weekend reduced rate periods indicated in the table in 1.1.1, preceding, are expressed as a percent reduction of the charge calculated at the rates indicated in the table in 1.6 and are applied to message connections established during the periods indicated in 1.1.1, preceding.

(E) Discounts apply to the charge for the initial minute occurring within the discount rate period and to all additional minutes occurring within each discount rate period. The discount is computed separately for charges in each rate period and the results are then totaled. When application of the discount results in a fractional charge, the amount will be rounded down to the lower cent.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba CenturyLink Section 2 (T) First Revised Sheet 3 Cancels Original Sheet 3 LONG DISTANCE SERVICES

1. Two-Point Service (Continued)

1.4 Rates (Continued)

1.4.2 Service Charges

(A) The rates in (B), (C) and (D), following, will apply on Dial Credit Card Station-to-Station, Operator Station-to-Station and Person-to-Person service in addition to the rates as specified in 1.4.1, preceding. Discounts as specified in 1.1.1, do not apply to service charges.

(B) Dial Calling Card Station-to-Station - For messages charged to an authorized telecommunications calling card and involving no other operator services, a charge of $1.00 per call applies where automatic recording equipment is available and the person originating the call dials zero, then the telephone number desired, and the call is billed to an authorized telecommunications calling card. Where no automatic recording equipment exists, this rate will also apply for an authorized telecommunications calling card call.

(C) Operator Station-to-Station - For Station-to-Station calls, a charge of $2.50 per call applies.

(D) Person-to-Person - For person-to-person calls, a charge of $3.50 per call applies.

(D)

(E) Directory Assistance service is provided according to the rates and procedures found in (D) Centel's General Customer Services Tariff, Section 3. (T)

(D)

(D)

ISSUED: April 29, 2016 EFFECTIVE: July 1, 2016 TX 16-02(Central) INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 2 Original Sheet 4

LONG DISTANCE SERVICES

1. Two-Point Service (Continued)

1.4.3 Discounted Rates Applicable to Messages Placed by Certified Hearing and/or Speech Disabled Residence Customers

(A) Disabled persons who have been certified to Centel as having a hearing or speech impairment which necessitates that they communicate via a telecommunications device (e.g., teletypewriter or similar keyboard communications equipment) will receive, upon written application to Centel, a reduction on intrastate intraLATA Dial Station-to-Station calls placed from the premises of the certified residence account where the telecommunications device is located.

(B) On directly dialed calls placed during the Day rate period, the existing intrastate intraLATA Evening discount will be applicable. On directly dialed calls placed during the Evening, Night and Weekend rate periods, the existing intrastate intraLATA Night and Weekend discount will apply.

(C) Certification of the hearing and/or speech disability requires the completion of an application form certified by a physician, otolaryngologist, audiologist, licensed speech- language pathologist or an authorized agency representing hearing and speech disabled individuals.

(D) The Centel Business Office, upon request, will provide a certification form for use by the applicant.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 2 Original Sheet 5

LONG DISTANCE SERVICES

1. Two-Point Service (Continued)

1.4 Rates (Continued)

1.4.4 Timing of Messages

(A) On Dial Station-to-Station, Dial Calling Card Station-to-Station or Operator Station-to- Station calls, chargeable time begins when connection is established between the calling and the called service points, mobile telephone system or private exchange system.

(B) On Person-to-Person calls, chargeable time begins when connection is established between the calling person and the particular person or service point specified or an agreed upon alternate.

(C) Chargeable time ends when the connection is terminated at any point.

(D) Chargeable time ends when the calling service point "hangs up" thereby releasing the network connection. If the called service point "hangs up" but the calling service point does not, chargeable time ends when the network connection is released either by automatic timing equipment in the telephone network or by the Centel/agent operator.

(E) Chargeable time does not include time lost because of faults or defects in service.

1.5 Charges Paid for by Coin Deposits in a Public or Semi-Public Coin Telephone

1.5.1 The charges for a message paid for by coin deposit in a public or semi-public coin telephone is the sum, rounded to the nearer multiple of $0.05, of the appropriate service charge, initial period rate and additional period rate plus applicable taxes.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 2 Original Sheet 6

LONG DISTANCE SERVICES

1. Two-Point Service (Continued)

1.6 Rate Tables

1.6.1 Dial Station-to-Station, Dial Calling Card Station-to-Station, Operator Station-to-Station, and Operator Person-to-Person.

Day Day Rate Initial Each Additional Mileage 1-Minute Minute

1-17 $ 0.10 $ 0.10

18-22 0.14 0.14

23-28 0.16 0.16

29-34 0.20 0.20

35-41 0.20 0.20

42-51 0.23 0.23

52-66 0.23 0.23

67-81 0.23 0.23

82-105 0.23 0.23

Over 0.23 0.23

1.6.2 The following service charges are in addition to the Basic Rate Schedule, listed in 1.6.1, when the call is placed using the following type services: Service Charge Per Call

Dial Calling Card Station to Station - $1.00

Operator Station to Station - 2.50

Person to Person - 3.50

1.6.3 Discounts apply to total minutes of use for all messages. Discounts do not apply to the above service charges.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 2 Original Sheet 7

LONG DISTANCE SERVICES

2. Special Reversed Charge Long Distance Message Telecommunications Service (2)

2.1 General

2.1.1 This service provides an arrangement in connection with LDMTS whereby a customer offers patrons the privilege of calling him without the payment of a LDMTS charge and without having to request specific reversal of this charge.

2.1.2 This service is not available for party line or coin service.

2.1.3 The exchanges from which patrons may call without charge are selected by the customer, subject to the approval of Centel, and for each intraLATA exchange selected, Centel assigns and lists in the directory a special call number.

2.1.4 Calls for the special number are accepted when originating at telephones located in the exchange with which the special call number is associated and from other intraLATA exchanges in the numbering plan area. Both the originating exchange and the terminating exchange must be located within the same LATA. Only those LDMTS calls placed by calling this special number are considered as coming within the scope of the service.

2.1.5 The customer agrees to pay the charges for all messages completed by means of the special number.

2.1.6 The initial contract period for this service is one month.

2.1.7 A Directory Listing is provided, without additional charge, only in the exchange selected by the customer with which the special call number is associated.

2.2 Rates

2.2.1 The customer utilizing this service is charged the established Operator Station-to-Station Service Charge as specified in 1.4.2 in addition to usage charges as specified in 1.6.1 for each completed message.

2.2.2 The following monthly service charge applies for Special Reversed Charge Long Distance Message Telecommunications Service:

Monthly Charge USOC

Service furnished in Metropolitan exchanges (including all zones within Metropolitan Exchange Area (1)...... $ 5.30 EEJ Service furnished in all other exchanges, per exchange ...... 3.20 ENT

(1) The Metropolitan exchanges are as follows: Austin, Corpus Christi, Dallas, Ft. Worth, Houston, San Antonio and Waco.

(2) This service is limited to existing customers at existing locations.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 2 Original Sheet 8

LONG DISTANCE SERVICES

3. Special Reduced Rates

3.1 Rates Applicable on Certain Holidays

3.1.1 On Christmas Day (December 25) and on New Year's Day (January 1), Independence Day (July 4), Thanksgiving Day and Labor Day and on resulting legal holidays when Christmas, New Year's or Independence Day legal holidays fall on dates other than December 25, January 1 or July 4, the holiday rate applicable on all classes of two-point LDMTS between intraLATA service points within the State of Texas, is the Evening rate, unless a lower rate would normally apply. Discounts do not apply to service charges as specified in 1.4.2.

4. Mobile Long Distance Message Telecommunications Service

4.1 General Regulations

4.1.1 Mobile Long Distance Message Telecommunications Service is a communication service through a mobile telephone service base station and a mobile unit and a land wire telephone located outside the mobile service area associated with such base station, or between two mobile units served through base stations having different rate centers.

4.1.2 For service between a mobile unit and a land wire telephone within the mobile service area associated with the mobile telephone service base station involved or between two mobile units reached through the same mobile telephone service base station, the regulations and rates applicable are as provided in Centel's General Customer Services Tariff, Section 17.

4.2 Rates

4.2.1 Mobile Long Distance Message Telecommunication Service rates apply between the applicable land wire telephone rate center and the rate center of the serving base station or between the rate centers of two base stations. The applicable rates are Dial Station-to-Station rates; Dial Calling Card Station-to-Station rates; Operator Station-to-Station rates; or Person-to-Person rates according to the connection established, as set forth in Section 1, Subsection 18, and Section 2, Subsection 1, of this tariff.

4.2.2 Flat Rate Mobile Telephone Service Base Stations

(A) When the mobile units and wire telephones are within this state, the rates between the applicable land wire telephone rate center of the serving base station, or between the rate centers of two base stations are the Dial Station-to-Station rates; Dial Calling Card Station- to-Station rates; Operator Station-to-Station rates; or Person-to-Person rates, according to the connection established, as set forth in Section 1, Subsection 18, and Section 2, Subsection 1, of this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 3 Original Sheet 1

OPTIONAL CALLING PLAN

1. General

This service is furnished under the guidelines contained in the General Regulations portion of this tariff. In addition, the following regulations apply.

1.1 Optional Calling Plan is an optional offering of Long Distance Message Telecommunications Service to residential and business local exchange customers whereby subscribing customers receive a discount on qualified long distance usage.

1.2 Qualified usage for this plan will be all intrastate intraLATA customer dialed station-to-station, sent-paid, non-coin minutes of use.

1.3 Optional Calling Plan is available to residence and business customers located in the State of Texas.

1.3.1 Optional Calling Plan is not offered in connection with Foreign Exchange, Foreign Serving Office, Private Pay Telephone, Public or Semi-Public Telephone Service.

1.3.2 This service is offered to Hotel/Motel customers, interexchange carriers and reseller customers for administrative trunks only. (1)

1.3.3 Optional Calling Plan service shall not be used for any purpose for which a payment or other compensation shall be received by either the customer or user, or in the collection, transmission, or delivery of any communications for others.

1.4 Only one option of this plan may apply to any single account.

1.5 The minimum service period of subscription to a particular plan is 30 days per plan.

(1) Interexchange carriers are defined in Centel's Intrastate Access Service Tariff, Section 2, Sheet 33.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 3 Original Sheet 2

OPTIONAL CALLING PLAN

2. Optional Calling Plan - Descriptions

2.1 Business Optional Calling Plans

2.1.1 Business customers in the State of Texas will have the option of subscribing to one of three intraLATA long distance discount plans.

The Business Optional Calling Plan discounts will apply to qualified usage placed during all time periods, as follows:

Option (A) - Business

The basic monthly rate for this service will be $3.00 per month. For the $3.00 monthly rate the business customer who selects this option will receive a 10% discount on qualified usage.

Option (B) - Business

The basic monthly rate for this service will be $8.00 per month. For the $8.00 monthly rate the business customer who selects this option will receive a 15% discount on qualified usage.

Option (C) - Business

The basic monthly rate for this service will be $20.00 per month. For the $20.00 monthly rate the business customer who selects this option will receive a 20% discount on qualified usage.

2.2 Residence Optional Calling Plans

2.2.1 Residential customers in the State of Texas will have the option of subscribing to one of two intraLATA long distance discount plans.

The residential Optional Calling Plan discounts will apply to qualified usage placed during all time periods.

Option (A) - Residence

The basic monthly rate for this service will be $3.00 per month. For the $3.00 monthly rate the residential customer who selects this option will receive a 15% discount on qualified usage.

Option (B) - Residence

The basic monthly rate for this service will be $10.80 per month. For the $10.80 monthly rate the residential customer who selects this option will receive one hour of qualified usage. Additional hours of qualified usage under this plan will be $10.00 per hour prorated on a per-minute basis.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 3 Original Sheet 3

OPTIONAL CALLING PLAN

3. Rates

3.1 Application of Rates and Discounts

3.1.1 After a subscriber's monthly intraLATA long distance bill is determined, including applicable time of day discounts, an additional percent discount will be applied to the total qualified portion of the bill, as defined previously. When application of the discount results in a fractional charge, the amount will be rounded to the nearest cent.

3.1.2 The Residence Option B rates are quoted in terms of a monthly rate per account and an additional hourly rate which will be charged by the minute for usage exceeding one hour.

3.1.3 Discounts apply to usage accumulated from all lines on a customer's account per class of service, per location.

3.2 Rates and Discounts

3.2.1 A summarization of Optional Calling Plans follow:

3.2.2 Business (1) (2) (3)

Business (Applicable All Times of Day)

Option (A) $ 3.00/month - (10% discount) Option (B) $ 8.00/month - (15% discount) Option (C) $20.00/month - (20% discount) Nonrecurring Subscription Fee $5.00

3.2.3 Residence Rates (1) (2) (3)

Residence (Applicable All Times of Day)

Option (A) $ 3.00/month - (15% discount) Option (B) $ 7.00/month - (one hour of usage with each additional hour rated at $10.00 per hour charged on a per minute of use basis) Nonrecurring Subscription Fee $5.00

(1) Monthly recurring rates apply on a per customer account basis. (2) The nonrecurring subscription fee is applicable only for the establishment of or change to an Optional Calling Plan option. The nonrecurring subscription fee does not apply in instances where a service ordering charge is applicable due to other service order charge activity. (3) Centel, at its option, may waive the nonrecurring subscription fee from time-to-time for service promotion campaigns.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 4 Original Sheet 1

CONSUMER SENSE LOCAL TOLL SERVICE

1. General

The Company's Consumer Sense Local Toll Service is furnished for Dial Station-to-Station intraLATA long distance calls originated in the Company's exchanges and is available in connection with individual residence and business lines. Customers subscribing to Consumer Sense Local Toll Service will be charged based on the Peak/Off-Peak rate schedule specified in 4.1 following.

Customers subscribing to Consumer Sense Local Toll Service may not subscribe to any other Optional Calling Plan offered by the Company.

2. Regulations

2.1 Consumer Sense Local Toll Service applies to all Dial Station-to-Station intraLATA long distance messages originated in the Company's exchanges.

2.2 The service will be ordered and billed on a per primary billing number (i.e., per account) basis. All applicable calls placed from lines associated with the same primary billing number will be included in the service.

2.3 Message details are included in the charges specified in 4.1 following.

2.4 The service is furnished for a minimum period of one month.

2.5 Changes to and from Consumer Sense Local Toll Services may be effective only on the subscriber's next bill date.

2.6 Consumer Sense Local Toll Service is not available to a customer who subscribes to any other Company-offered optional calling plan or for use with public, semi-public, or private pay telephone service.

3. Applicability

The discounts offered under this Service apply to:

3.1 All Dial Station-to-Station intraLATA Long Distance Message Telephone Service (MTS) originating calls in any of the Company's exchanges during a billing period.

3.2 The applicable discount amount is determined on the basis of intraLATA billed revenue to a single billing number.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 4 Original Sheet 2

CONSUMER SENSE LOCAL TOLL SERVICE

4. Rates and Charges

4.1 The following rate schedule will apply:

Time Frame Weekdays Rate Per Minute

Peak 7:00 am to 7:00 pm* Monday - Friday $ .20/Minute

Off-Peak 7:00 pm to 7:00 am* Monday-Friday .15/Minute All Hours Saturday & Sunday

* Up to but not including

5. Business Sense Local Toll Service

5.1 General

The Company's Business Sense Local Toll Service is furnished for Dial Station-to-Station intraLATA long distance calls originated in the Company's exchanges and is available in connection with business lines and work at home lines. Customers subscribing to Business Sense Local Toll Service will be charged based on a single flat-rate as specified in 5.4.1 following. Customers subscribing to Business Sense Local Toll Service may not subscribe to any other Optional Calling Plan offered by the Company.

5.2 Regulations

5.2.1 Business Sense Local Toll Service applies to all Dial Station-to-Station intraLATA long distance messages originated in the Company's exchanges.

5.2.2 The service will be ordered and billed on a per primary billing number (i.e., per account) basis. All applicable calls placed from lines associated with the same primary billing number will be included in the service.

5.2.3 Message details are included in the charges specified in 5.4.1 following.

5.2.4 The service is furnished with two monthly minimum commitment levels: $50 a month and $200 a month. If the customer's in-service level falls below the commitment level, the Company reserves the right to bill the customer for the entire commitment level. For example, a customer that commits to a $200 monthly minimum, but only spends $175 in a month, may be billed $200 for the month.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 4 Original Sheet 3

CONSUMER SENSE LOCAL TOLL SERVICE

5. Business Sense Local Toll Service (Continued)

5.2 Regulations (Continued)

5.2.5 The service is furnished with an option of three term periods: non-term (i.e., month-to-month), one year and two years. The minimum period for the non-term plan is one month. The minimum period for the one-year plan is 12 months. The minimum period for the two year plan is 24 months. If a customer chooses to discontinue participation on the plan prior to the expiration of the one year or two year term periods, the Company reserves the right to assess Termination Liability charges. The assessed charges would be based on the number of months remaining in the term plan and the minimum monthly commitment level agreed to by the customer.

5.2.6 Changes to and from Business Sense Local Toll Service may be effective only on the subscriber's next bill date.

5.2.7 Business Sense Local Toll Service is not available to a customer who subscribes to any other Company-offered optional calling plan or for use with public, semi-public, or private pay telephone service.

5.3 Applicability

The discounts offered under this Service apply to:

5.3.1 All Dial Station-to-Station intraLATA Long Distance Message Telephone Service (MTS) originating calls in any of the Company's exchanges during a billing period.

5.3.2 The applicable discount number is determined on the basis of intraLATA billed revenue to a single billing number.

5.4 Rates and Charges

5.4.1 The following rate schedule will apply:

Business Sense Local Toll Rate Schedule

Monthly Minimum (Full Minute Rates*) Commitment Level Non-Term One Year Two Year

$ 0 $ .17 $ .165 $ .16 50.00 .15 .145 .14 200.00 .10 .095 .09

Time Frame: 24 Hours/Day, 7 Days/Week

* Note: The above full minute rates bill in first 18 second minimum and additional 6 second increments.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 5 Original Sheet 1

SIMPLY FIVE

1. General

The Company's Simply Five is an optional Intrastate IntraLATA long distance flat rated service with rates which are non-distance sensitive. Simply Five is available only to subscribers who have selected The Company as the subscriber's primary intraLATA long distance carrier. Simply Five is available to residence and business customers. Customers subscribing to Simply Five will be charged the rates listed below.

2. Regulations

2.1 Simply Five applies to all IntraLATA 1+ Direct Distance Dialed (DDD), Station-to-Station long distance messages originating in the Company's exchanges.

2.2 The service will be ordered and billed on a per primary billing number (i.e., per account) basis. All applicable calls placed from lines associated with the same primary billing number will be included in the service.

2.3 Message details are included in the charges specified in 4.1 following.

3. Applicability

3.1 The service is furnished for a minimum period of one month.

3.2 Simply Five is not available to a customer who subscribes to any other Company offered optional calling plan or for use with pay telephone service.

3.3 This service allows a maximum monthly billed usage of 200, 500 or 2000 minutes. Monthly usage exceeding those amounts will be billed at the applicable Sense Local Toll Off-Peak rate or the Business Sense Local Toll $0 Monthly Minimum Commitment Level, Non-Term rate, as described in the IntraLATA Services Tariff, Long Distance Message Telecommunications Service, Section 4, 4.1. and Section 4, 5.4.1.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 5 Original Sheet 2

SIMPLY FIVE

4. Rates and Charges

4.1 The following rate schedule shall apply 24 hours per day 7 days per week:

Monthly Monthly Billed Recurring Rate Per Minutes Rate Minute1 SAE Code

a. 1 to 200 $ 4.95 $ .05 ASBEASC (5CE) 201+ *

b. 1 to 500 $14.95 $ .05 ASBEASC (5C1) 501+ *

c. 1 to 2000 $49.95 $ .05 ASBEASC (5C2) 2001+ *

1 Per minute applies to any minute or fraction thereof.

* Consumer Sense Local Toll Off-Peak rate or Business Sense Local Toll $0 Monthly Minimum Commitment Level, Non-Term rate as described in the IntraLATA Services Tariff, Long Distance Message Telecommunications Service, Section 4, 4.1 and Section 4, 5.4.1.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 6 Original Sheet 1

RESERVED FOR FUTURE USE

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Long Distance Message Telecommunications Service of Texas dba Embarq Section 7 Original Sheet 1

RESERVED FOR FUTURE USE

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Index (T) 1st Revised Sheet 1 Cancels Original Sheet 1

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 1 Cancels Original Sheet 1

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 2 Cancels Original Sheet 2

RESERVED (C)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Cancels Original Sheet 3

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 4 Cancels Original Sheet 4

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 5 Cancels Original Sheet 5

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Wide Area Telecommunications Service (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 6 Cancels Original Sheet 6

RESERVED (C)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 7 Cancels Original Sheet 7

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 8 Cancels Original Sheet 8

RESERVED (C) (D)

(D)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 9 Cancels Original Sheet 9

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 10 Cancels Original Sheet 10

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 11 Cancels Original Sheet 11

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 12 Cancels Original Sheet 12

RESERVED (C)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 13 Cancels Original Sheet 13

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 14 Cancels Original Sheet 14

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 15 Cancels Original Sheet 15

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 2 (T) 1st Revised Sheet 1 Cancels Original Sheet 1

RESERVED (C)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 2 (T) 1st Revised Sheet 2 Cancels Original Sheet 2

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 2 (T) 1st Revised Sheet 3 Cancels Original Sheet 3

RESERVED (C)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 2 (T) 1st Revised Sheet 4 Cancels Original Sheet 4

RESERVED (C) (D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 2 (T) 1st Revised Sheet 5 Cancels Original Sheet 5

RESERVED (C)

(D)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company (D) of Texas dba CenturyLink Section 2 (T) 1st Revised Sheet 6 Cancels Original Sheet 6

RESERVED (C)

(D)

(D)

(D)

(D)

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Index Original Sheet 1

INDEX SECTION 1 REGULATIONS SHEET

1. Undertaking of Centel ...... 1-7 2. Use ...... 8-9 3. Obligations of the Customer ...... 10-11 4. Payment Arrangements and Credit Allowances ...... 11-17 5. Definitions ...... 18-28 6. Connections of Terminal Equipment and Communications Systems ...... 29-61 7. Method of Applying Rates ...... 61-68 8. Exceptions ...... 68 9. Joint User Service ...... 68-69 10. Special Charges, Fees, and Taxes ...... 69 11. Surcharge ...... 70-71

SECTION 2 SERVICES AND RATES

1. General ...... 1 2. Description of Services ...... 2-65

SECTION 3 RESERVED FOR FUTURE USE

SECTION 4 LOCAL ACCESS AND TRANSPORT AREAS

1. General ...... 1 2. List of Local Access and Transport Areas (LATAS) ...... 1-11

SECTION 5 INTEREXCHANGE 911 SERVICE

1. Description of Service ...... 1 2. Application of Service ...... 1 3. Rates ...... 1

SECTION 6 PRIVATE SWITCH 911 SERVICE

1. Description of Service ...... 1 2. Explanation of Terms ...... 1-2 3. Technical Specifications ...... 2 4. Rules and Regulations ...... 3-5 5. Private Switch 911 Service Rates and Charges...... 5-6

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 1 REGULATIONS 1. Undertaking of Centel 1.1 Scope 1.1.1 This tariff section contains the regulations and definitions governing the furnishing of private line services by Centel. The regulations of other local exchange companies (LECs) apply to the portion of private line services which are furnished at "other line" charges. 1.1.2 Private line service is the furnishing of Centel facilities for communications between specified locations, within the Local Access and Transport Areas (LATAs) all within the state of Texas, 24 hours daily, seven days per week. Facilities may be those of Centel only, or those of Centel and other LECs. 1.1.3 Centel does not undertake to transmit messages, but offers the use of its facilities where available to customers for such purposes. 1.1.4 Private line service is the provision of Centel facilities for communication between specified locations of customers, authorized users, or joint users. 1.1.5 Services provided under this tariff shall be used by private line customers for use in obtaining end- to-end private line services. Interexchange carriers (IXCs) may use services found in this tariff that will meet their administrative needs, however an IXC is restricted from using services found in this tariff to furnish a portion of their authorized service offerings. 1.2 Limitations 1.2.1 In case a shortage of facilities exists at any time, either for temporary or protracted periods, the establishment of long distance telecommunications service and/or regular local exchange telephone services shall take precedence over all other services and uses. 1.2.2 Service under this tariff is subject to the availability of facilities. 1.2.3 The use and restoration of service shall be in accordance with Part 64, Subpart D, Appendix A of the Federal Communications Commission's (FCC) Regulations which specify the priority system for such activities. 1.2.4 Subject to compliance with the above-mentioned rules, where a shortage of channels or equipment exists at any time either for temporary of protracted periods, the establishment of long distance message telecommunications service (LDMTS) shall take precedence over all other services.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 2

REGULATIONS 1. Undertaking of Centel (Continued)

1.3 Liability

1.3.1 In view of the fact that the customer has exclusive control of his communications over the facilities furnished him by Centel, and of the other uses for which facilities may be furnished him by Centel, and because of unavoidable errors incident to the services and to the use of such facilities of Centel, the services and facilities furnished, by Centel, are subject to the terms, conditions, and limitations herein specified.

1.3.2 Centel's failure to provide or maintain facilities under this tariff shall be excused by labor difficulties, governmental orders, civil commotions, acts of God and other circumstances beyond Centel's reasonable control, subject to the interruption allowance provisions of this tariff.

1.3.3 Centel's liability, if any, for its gross negligence or willful misconduct is not limited by this tariff. With respect to any other claim or suit, by a customer or any others, for damages arising out of mistakes, omissions, interruptions, delays or errors, or defects in transmission occurring in the course of furnishing service hereunder, Centel's liability, if any, shall not exceed an amount equivalent to the proportionate charge to the customer for the period of service during which such mistake, omission, interruption, delay, error, or defect in transmission or service occurs and continues. This liability shall be in addition to any amounts that may otherwise be due to the customer under this tariff as an allowance for interruptions. However, any such mistakes, omissions, interruptions, delays, errors, or defects in transmission or service which are caused or contributed to by the negligence or willful act of the customer, authorized user, or joint user, or which arise from the use of customer-provided facilities or equipment shall not result in the imposition of any liability whatsoever upon Centel. 1.3.4 The customer, authorized user, or joint user indemnifies and saves Centel harmless against (1) claims for libel, slander or the infringement of copyright arising from the material transmitted over the facilities; (2) claims for the infringement of patents arising from, combining with, or used in connection with, facilities of Centel apparatus and systems of the customer, authorized user or joint user; and (3) against all other claims arising out of any act or omission of the customer, authorized user or joint user in connection with the facilities provided by Centel. 1.3.5 Centel will not be liable for any consequential, incidental or indirect damages for any cause of action, whether in contract or tort. Consequential, incidental and indirect damages include, but are not limited to, lost projects, lost revenues and loss of business opportunity, whether or not Centel was aware or should have been aware of the possibility of these damages.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 3 REGULATIONS

1. Undertaking of Centel (Continued)

1.3 Liability (Continued)

1.3.6 Centel does not guarantee nor make any warranty with respect to equipment provided by it for use in an explosive atmosphere. The customer, authorized user or joint user, indemnifies and holds Centel harmless from any and all loss claims, demands, suits, or other actions, or any liability whatsoever, whether suffered, made, instituted or asserted by the customer, authorized user or joint user, or by any other party or persons for any personal injury to or death of any person or persons, and for any loss, damage or destruction of any property, whether owned by the customer, authorized user or joint user, or others, caused or claimed to have been caused directly or indirectly by the installation, operation, failure to operate, maintenance, removal, presence, condition, location or use of said equipment so provided.

Centel may require each customer to sign an agreement for the furnishing of such equipment as a condition precedent to the furnishing of such equipment.

1.3.7 When the lines of other LECs are used in establishing connection to points not reached by Centel's lines, Centel is not liable for any act or omission of the other LEC.

1.3.8 Centel is not liable for any defacement of or damage to the premises of a customer, authorized user or joint user, resulting from the furnishing of channel facilities or the attachment of the apparatus and associated wiring furnished by Centel on such premises or by the installation or removal thereof, when such defacement or damage is not the result if negligence of the agents or employees of Centel.

1.3.9 Centel shall in no way be liable for any harm or any damages arising in connection with any failure by the customer to properly bond or ground a mobile premises or any mobile structure in which service is to be provided (e.g., boats, RVs and mobile homes), as well as equipment and associated wiring located on the customer's side of the point of interconnection at any premises, whether fixed or mobile.

1.3.10 Centel will make reasonable efforts to cure any material failure to provide service caused solely by year 2000 defects in Centel hardware, software or systems. Due to the interdependence among telecommunications providers and the interrelationship with non-Centel processes, equipment and systems, Centel is not responsible for failures caused by circumstances beyond its control including, but not limited to, failures caused by: 1) the Customer; 2) other telecommunications providers; or 3) customer premises equipment. In addition, Centel does not ensure compatibility between Centel and non-Centel services used by the Customer.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 4

REGULATIONS

1. Undertaking of Centel (Continued)

1.4 Provision of Facilities

1.4.1 Centel or Centel and other LECs with which it jointly furnishes service, will provide, maintain and repair all facilities and equipment necessary for private line service, except for those facilities on the customer's side of the point of interconnection and except that the customer, authorized user or joint user may provide his own terminal equipment, communications systems or premises wiring for use with such service as specified in paragraph 6, following.

(A) When a private line service is used for teletypewriter transmission, the teletypewriter equipment will be provided by the customer, authorized user or joint user.

(B) When a private line service is used for data transmission which requires terminal equipment (data sets), such data sets will be provided by the customer, authorized user or joint user, except that Centel shall furnish all equipment located on Centel premises. Where the customer, authorized user or joint user provides his own data sets on a private line, it shall be the responsibility of the customer, authorized user or joint user to insure the continuing compatibility of such data sets with the facilities, including data sets, furnished by Centel.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 5

REGULATIONS

1. Undertaking of Centel (Continued)

1.4 Provision of Facilities (Continued)

1.4.1 (Continued)

(C) Centel has the service responsibility up to the point of interconnection on the customer's premises at which the interface appears for the customer-provided equipment. Terms and conditions for the location of interconnection points are in the "Rules and Regulations Applying to All Customers' Contracts" section of the General Customer Services Tariff.

(D) Private line service is offered where existing facilities and operating conditions permit.

1.4.2 The charges specified in this tariff do not contemplate installation, maintenance, or repair work being performed by Centel employees involved at a time when overtime wages apply as a result of customer, authorized user or joint user requests, nor do they contemplate work once begun being interrupted by the customer, authorized user or joint user.

If the customer requests that labor be performed at hours of the day or days of the week other than normal work hours or days, or on holidays, or interrupts work once begun, an additional charge, based on the additional costs involved, applies. Such charges do not apply if sufficient advance notice is given so that employees' work schedules can be changed. The additional charge does not apply to overtime or premium time work at Centel's convenience.

In situations where the customer requests that "standby" Centel personnel be provided for installation or maintenance irrespective of when such "standby" workmen are provided, the additional estimated cost of providing such "standby" personnel will be billed to the customer.

1.4.3 Services used exclusively with customer terminal equipment will be provided for intercommunication between station locations in different buildings on the same premises where facilities exist and conditions permit. (1)

1.4.4 Facilities furnished by Centel on the premises of a customer, authorized user or joint user, are the property of Centel, whose agents and employees shall have the right to enter said premises at any reasonable hour for the purpose of installing, inspecting or repairing the lines, or upon termination of the service, for the purpose of removing such lines.

1.4.5 When serving office boundary realignments are necessary at the discretion of Centel, those private line services affected by the change will be reconfigured, and this may result in increases or decreases in charges. Any change in the charges billed to a private line customer will become effective when the serving office area transfer is made.

(1) Obsolete -- See Section 2 of this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 6

REGULATIONS

1. Undertaking of Centel (Continued)

1.4 Provision of Facilities (Continued)

1.4.6 The placement of the point of interconnection shall be located in a manner consistent with federal and state regulatory requirements. This location shall be at each customer's premises, unless specified otherwise by the customer or building/landowner, and agreed to by Centel.

1.4.7 In addition to the obsolescence restrictions found in Section 2 of this tariff, the following is applicable to on-premises private line services:

(A) Existing Single Unit Installations - If the existing cable is absent of network channel terminating equipment (NCTE), the point of interconnection shall be a point established within twelve inches of the protector, or absent a protector, within twelve inches of the entry point to the customer's premises. The single unit building owner has the right to access, rearrange, attach to or remove the cable up to the newly defined point of interconnection.

If the cable has existing circuits with NCTE present, the points of interconnection may remain at the existing locations and the customer may continue to add additional service where spare facilities are available. Or the building owner can establish a minimum point of entry (MPOE) and relocate the NCTE. Service charges would apply as found in Section 4 of the General Customer Services Tariff.

(B) Existing Multiunit Installations - The point of interconnection is determined per current practices. In the case of multiple points of interconnection within a multiunit premises, the point of interconnection for a customer shall not be further inside his or her unit than a point twelve inches from where the wiring enters his or her premises.

(C) New Multiunit Installations - Where wiring is installed after June 9, 1994, Centel will negotiate with the building owner to locate a point of interconnection twelve inches within each customer premises unit.

However, for (B) and (C) above, the multiunit property owner has the option of having a single point of interconnection for all customers or separate points of interconnection for each customer. The owner can determine where the points of interconnection shall be located provided that such points of interconnection for each customer premises unit shall not be further inside the customer's premises than twelve inches from where the wiring enters the customer's unit. If a single point of interconnection is established, all current on-premises private line services beyond that newly established point of interconnection will be discontinued.

1.4.8 Any changes in charges for private line services that are affected by the relocation of the point of interconnection will be effective on the scheduled date of the relocation of the point of interconnection, regardless of the actual date of the relocation of the point of interconnection.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 7

REGULATIONS

1. Undertaking of Centel (Continued)

1.5 Protective Equipment

1.5.1 When a hazardous electrical environment is present at customer, authorized user or joint user premises, protective equipment is required to protect all facilities when the estimated rise in ground potential is sufficient to cause damage to Centel facilities or to endanger the safety of its employees or customers. The customer may provide the protective equipment subject to Centel specifications. The protective equipment may also be provided in accordance with 1.7.

1.5.2 Neutralizing transformers, isolating transformers, drainage coils and other special protective equipment for use in providing service to customer, authorized user or joint user premises where there are high ground potentials, even though not required by 1.5.1, above, may be provided by the customer or in accordance with 1.7.

1.6 Application for Private Line Service

1.6.1 Any applicant for private line service may be required to sign an application requesting Centel to furnish the service in accordance with rates, charges, regulations as specified in this tariff.

1.6.2 Centel reserves the right to refuse service to any applicant who is found to be indebted to Centel for private line service previously furnished until satisfactory arrangements have been made for the payment of such indebtedness.

Centel may also refuse to furnish service to any applicant desiring to establish service for former customers or previous customers of Centel who are indebted for private line service until satisfactory arrangements have been made for the payment of such indebtedness.

1.6.3 If private line service is established and it is subsequently determined that either condition in 1.6.2, preceding, exists, Centel may suspend or disconnect such service on five days written notice until satisfactory arrangements have been made for the payment of the prior indebtedness.

1.7 Special Equipment and Arrangements

1.7.1 When the customer, authorized user or joint user requests a service arrangement which requires the installation of special equipment or modification of standard equipment, and for which provision is not otherwise made in this tariff, it can be furnished by Centel at additional rates and charges.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 8

REGULATIONS

2. Use

A private line service may be used for one or more of the purposes specified in 2.1, following. When a private line service is arranged for use by authorized or joint users, the users shall be permitted to use such service in the same manner as the customer as specified in 2.1, following.

2.1 Authorized Use

2.1.1 Authorized users may use private line services for one or more of the following:

(A) For the transmissions of communications to or from the customer and relating directly to the customer's business.

(B) For the transmission (to all stations simultaneously) of communications which relate directly to matters of common interest to the customer and the authorized users or joint users when those connected to the service are all in the same general line of business.

(C) For the transmission of communications relating directly to the business of a subsidiary corporation over which the customer, authorized user or joint user exercises control through the ownership of more than 50% of the voting stock.

(D) For the transmission of communications to or from any stations on a service furnished to a department or agency of the Centel States Government when the head of the department or agency, or his duly authorized representative, notifies Centel in writing that the use is intended only for official Centel States government business.

(E) Where the customer is an organized stock or commodity exchange for the transmission of communications to or from an exchange member located on the floor of such exchange and relating directly to the business of the member.

(F) Where the use of the service relates to coordination or exchange of electrical pooled power for the transmission of communications between any two or more stations of such service or similar services furnished to others who are parties to the coordinating or exchange arrangement.

(G) For the transmission of communications to, from, within and between air carriers, where the customer is an aeronautical communications company licensed under the Aviation Services rules of the Federal Communications Commission (FCC) to operate stations in the aeronautical mobile and fixed services.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 9

REGULATIONS

2. Use

2.2 Resale of Use for Others

Private line service shall not be used for any purpose for which a payment or other compensation, shall be received by either the customer, authorized user or joint user, or in the collection, transmission, or delivery of any communications for others. This provision does not apply for the following:

2.2.1 Shared cost of private line service in a resold or shared arrangement:

(A) Shared arrangement within a multiline terminating system area

(1) Private line service may be shared, subject to the regulations set forth herein, in a long term arrangement between the customer and users. The customer may, but does not have to, use that private line service.

(2) Sharing arrangements must be nonprofit. The allocation of charges to each participant shall be on a nonprofit pro rata basis.

Where the customer for a sharing arrangement is organized as a nonprofit entity, a not for profit fee, charged solely for the management of the sharing arrangement, may be allocated by the customer among the sharing participants.

(3) Centel shall not be responsible for the allocation of usage of, or charges for, shared private line service. Orders including those which involve the start, rearrangement, release or discontinuance of service, will be accepted by Centel only from the customer.

(B) An arrangement between the customer, authorized users or joint users to share the cost of a private line service does not apply to a Composite Data Service Vendor's premises where one type of service may be provided for the exclusive use of the Composite Data Service Vendor's management or employees and another type of service may be provided for the use of the patrons of the Composite Data Service Vendor.

2.3 Unlawful Purposes

The service is furnished subject to the condition that it will not be used for any unlawful purpose. Service will be discontinued forthwith if any law enforcement agency, acting within its apparent jurisdiction, advises in writing that such service or channels are being used in violation of law. Centel will refuse to furnish service when it has reasonable grounds to believe that such service will be used in violation of the law.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 10

REGULATIONS

3. Obligations of the Customer

3.1 Customer Responsibilities

In addition to other regulations, the customer shall be responsible for:

establishing his identity in the course of any communication as often as may be necessary;

establishing the identity of the person or persons with whom connection is made at the called station;

damages to facilities of Centel caused by the negligence or willful act of the customer, authorized user or joint user, and not due to ordinary wear and tear or other causes beyond the control of the customer;

reimbursing Centel for any loss through theft of the equipment or apparatus on the customer's, authorized user's or joint user's premises;

the provision of appropriate power including the outlet and power wiring when Centel equipment installed on the premises of a customer, authorized user or joint user requires power for its operation;

furnishing and maintaining poles and/or underground facilities on private property. The customer is also responsible for the provision of space, supporting structures and on premised conduit for Centel equipment located on the premises of the customer, authorized user or joint user;

the provision, installation and maintenance of sealed conduit with explosive-proof fittings between equipment furnished by Centel in explosive atmospheres and points outside the hazardous area where connection may be made with regular facilities of Centel, and may be required to install and maintain Centel equipment within the hazardous area if, in the opinion of Centel, injury or damage to Centel employees or property might result from installation or maintenance by Centel.

obtaining permission for Centel agents or employees to enter the premises of any authorized user or joint user at any reasonable hour for the purpose of installing, inspecting, repairing or removing the facilities of Centel; and

making Centel facilities available periodically for maintenance purposes at a time agreeable to both Centel and the customer, authorized user or joint user. No allowance will be made for the period during which the service is interrupted for such purposes.

bonding and/or grounding a mobile premises or any mobile structure in which service is to be provided or used (e.g., boats, RVs and mobile homes), as well as any equipment and associated wiring on the customer's side of the point of interconnection at any premises, whether fixed or mobile.

3.2 Rearrangements and Repairs

A customer, authorized user or joint user may not rearrange, disconnect, remove or attempt to repair or permit others to rearrange, disconnect, remove or attempt to repair any apparatus or wiring installed by Centel except upon the written consent of Centel or except as otherwise authorized in Centel's tariffs.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 11

REGULATIONS

3. Obligations of the Customer (Continued)

3.3 Transfer of Service

Service furnished one customer may be assumed by a new customer upon due notice of cancellation or abandonment, provided there is no lapse in service. The new customer must assume all the obligations of the previous customer. Such transfers are subject to applicable nonrecurring charges as specified in this tariff.

3.4 Intended Use

The purpose or purposes for which the private line service is to be used must be made known to Centel at time of application for service. In the event of a planned change in use of service the customer will notify Centel in writing prior to the change.

4. Payment Arrangements and Credit Allowances

4.1 Payment of Charges and Deposits

4.1.1 Applicants for service may be required to pay in advance of the establishment of service the nonrecurring charges applicable, together with fixed charges applicable for the first month.

4.1.2 The customer is responsible for payment of all charges for facilities and services furnished the customer or shared with an authorized user or joint user in accordance with Centel's regular billing and collection practices.

A one-time penalty as allowed in P.U.C. SUBST. R. §26.27(a) will be applicable on any bill not received by Centel or at Centel's authorized payment agency by the next bill date. For purposes of applying the penalty, the due date should be extended to the first following business day if it would otherwise fall on a weekend or holiday. No penalty shall be assessed on federal, state, or local government bills. The penalty shall not be applied to any balance to which the penalty was applied in a previous billing. The one-time penalty shall only apply on undisputed amounts or if the dispute is resolved in favor of Centel.

4.1.3 If billing for Centel's utility services are found to differ from the Centel's tariffed rates, or if Centel fails to bill the customer for such services, a billing adjustment will be calculated by Centel. If the customer is due a refund, an adjustment shall be made for the entire period of the overcharges. If an overcharge is adjusted by Centel within three billing cycles of the bill in error, interest is not applicable. However, if an overcharge is not adjusted by Centel within three billing cycles of the bill in error, interest shall be applied to the amount of the overcharge as specified in P.U.C. SUBST. R. §26.27(a). The rate of interest is set annually by the Commission for a twelve-month period and is based on an average of prime commercial paper rates for the previous twelve-month period. (1)

(1) The rates of interest to be paid on customer deposits in accordance with Texas Utilities Code Annotated §183.003 (Vernon 1998), and overbillings or underbillings in accordance with P.U.C. SUBST. R. §26.27(a), are established annually on December 1 for the subsequent calendar year by the Commission, as reflected in the Order Setting Interest Rates included in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 12

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.1 Payment of Charges and Deposits (Continued)

4.1.4 Centel may, in order to safeguard its interest, require an applicant for service, or a customer, to make a deposit not to exceed the estimated amount of the total charges for service and facilities for any period of two months, such deposit to be held by Centel as guarantee of payment. The fact that a deposit has been made shall in no way relieve the applicant or customer from complying with Centel's regulations as to advance payments and the prompt payment of bills on presentation nor constitute a waiver of modification of the regular practices of Centel providing for the discontinuance of service for nonpayment of any sums due Centel for service rendered. Simple interest set annually by the Commission at the rate of not less than six percent per annum or greater than twelve percent per annum will be paid on deposits.(1) Payment of the interest to the customer shall be annually if requested by the customer, or at the time the deposit is returned or credited to the customer's account. The deposit shall cease to draw interest on the date it is returned or credited to the customer's account. Refer to 4.1.4 for time frames allowed to pay a deposit on an existing account.

If service is not connected or after disconnection of service, Centel shall promptly and automatically refund the customer's deposit plus accrued interest or the balance, if any, in excess of the unpaid bills for service furnished. A transfer of service from one premises to another within the service area of Centel shall not be deemed a disconnection within the meaning of these rules, and no additional deposit may be demanded unless permitted by these rules.

When the customer has paid bills for service for twelve (12) consecutive residential billings or for twenty-four (24) consecutive commercial or industrial billings without having service disconnected for nonpayment of bill and without having more than two occasions in which a bill was delinquent, and when the customer is not delinquent in the payment of the current bills, Centel shall promptly and automatically refund the deposit plus accrued interest to the customer in the form of cash or credit to a customer's bill, or void the guarantee.

In addition to the treatment specified above, any applicant, or one for whom an application is made, who owes Centel for private line service furnished under a former contract shall pay or make satisfactory arrangements for paying any bill outstanding and unpaid for such service, before any additional service will be furnished.

An initial deposit may not be required from residential customers unless the customer has more than one occasion during the last 12 consecutive months of service in which a bill for a utility service was paid after becoming delinquent or if the customer's service was disconnected for nonpayment, in accordance with P.U.C. SUBST. R. §26.24(c)(2).

(1) The rates of interest to be paid on customer deposits in accordance with Texas Utilities Code Annotated §183.003 (Vernon 1998), and overbillings or underbillings in accordance with P.U.C. SUBST. R. §26.27(d) and (e), are established annually on December 1 for the subsequent calendar year by the Commission, as reflected in the Order Setting Interest Rates included in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 13

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.1 Payment of Charges and Deposits (Continued)

4.1.4 (Continued)

If the residential applicant has been a customer of any utility for the same kind of service within the last two years and is not delinquent in payment of any such utility service account and during the last 12 consecutive months of service did not have more than one occasion in which a bill for such utility service was paid after becoming delinquent and never had service disconnected for nonpayment; applicants are encouraged to obtain a letter of credit history from their previous utility, and utilities are encouraged to provide such information with final bills, under P.U.C. SUBST. R. §26.24(a)(2).

An application for service, or a present customer may satisfy a deposit requirement by providing a Contract of Guaranty in an amount not less than the requested deposit, from a present customer acceptable to Centel. The guaranty contract shall be on a form provided by Centel which shall include Centel's right to transfer charges from a defaulted bill to the customer, from whom a deposit or a contract of guaranty was required to the guarantor's account or accounts and the further right to suspend the guarantor's service pursuant to Section 2, 2.5.3 of the General Customer Services Tariff.

The fact that a deposit has been made or a guaranty provided, shall in no way relieve the customer from complying with Centel's regulations as to prompt payment of bills, nor constitute a waiver or modification of the regular practices of Centel providing for the temporary suspension of service or the termination of the service contract for nonpayment of bills.

4.1.5 Service may be discontinued for failure to furnish a suitable deposit when conditions appear to require Centel to have such credit protection. However, under P.U.C. SUBST. R. §26.24(d)(1) and (2), the time frames allowed to pay a deposit on an existing account are:

Deposit required during the first twelve months of service based on usage:

Actual usage must be three times the estimated usage (or three times average usage of most recent three bills) and current usage must exceed $150 and 150% of the security held before a new deposit is requested. If a deposit is requested, the customer may be required to pay the deposit within 10 days after issuance of written notice of termination and requested deposit, or, in lieu of the deposit, the customer may elect to pay the current usage within 10 days after issuance of written notice of termination and requested deposit.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 14

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.1 Payment of Charges and Deposits (Continued)

4.1.5 (Continued)

Deposit requirements based on billing:

Commercial

Actual billings of a commercial customer must be at least twice the amount of the estimated billings, and a suspension notice has been issued on a bill within the previous 12-month period before a new deposit can be requested. If a deposit is requested, the customer may be required to pay the new deposit within 15 days after issuance of written notice of termination and requested deposit, or in lieu of the deposit, the customer may elect to pay the current bill by the due date of the bill, provided the customer has not exercised this option in the previous 12 months.

Residential

Actual billings of a residential customer must be at least twice the amount of the estimated billings after two billing periods, and a suspension notice has been issued on a bill within the previous 12- month period before a new deposit can be requested. If a deposit is requested, the customer may be required to pay the new deposit within 15 days after issuance of written notice of termination and requested deposit, or, in lieu of the deposit, the customer may elect to pay the current bill by the due date of the bill, provided the customer has not exercised this option in the previous 12 months.

4.2 Cancellation for Cause

Service may be discontinued for nonpayment of any sum due Centel, or upon illegal use of any service, or upon a violation of any of the conditions governing the furnishing of a service. The due date of the bill shall not be less than 16 days after issuance. If the bill is not paid by the due date, Centel may discontinue service after ten days written notice to the customer under P.U.C. SUBST. R. §26.28(b).

4.3 Minimum and Fractional Rates and Charges

4.3.1 The minimum service period is one month except for special construction which may necessitate a longer contract period, or as otherwise provided in this tariff.

4.3.2 If the period of use exceeds the minimum period, the charges for any fractional part of a month following the minimum period will be a proportionate part of the monthly charges based on the actual number of days the facilities are furnished. For the purpose of administering this regulation with respect to the determination of charges for a fractional part of a month, every month is considered to have thirty days.

4.3.3 In applying a rate involving a fraction of a cent, the fraction is carried through the entire computation of the charge for the service. When the charge so computed includes a fraction of a cent, a fraction of less than one-half cent is disregarded and a fraction of one-half cent or more is treated as one cent.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 15

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.4 Special Construction

4.4.1 Rates and charges for special construction will be based on estimated costs incurred by Centel and may include (1) one-time service charges, (2) recurring type charges, (3) termination liabilities, (4) or combination thereof. Special construction rates and charges are in addition to rates and charges for private line service in this tariff.

4.4.2 Special construction is that construction undertaken:

(A) where facilities are not presently available, and there is no other requirement for the facilities so constructed.

(B) of a type other than that which Centel would normally use in the furnishing of its services.

(C) over a route other than that which Centel would normally use in the furnishing of its services.

(D) in quantity greater than that which Centel would normally construct to serve the customer needs.

(E) on a temporary basis until permanent facilities are available.

(F) involving abnormal costs.

(G) on an expedited basis.

4.4.3 A request for charges for special construction as provided in 4.4.2 (B) and (C), above, will be subject to a special quotation charge for the direct administrative and engineering costs associated with the preparation of that particular quotation. The amount of such charges will be credited to the account of the customer when an order for that particular special construction is received within 90 days of the quotation. The customer will authorize, through a designated representative, the request for a quotation before Centel undertakes any work involved in developing such quotations.

4.4.4 No charge, other than the quotation charge, as provided in 4.4.3, above, applies as follows:

(A) where special construction has been started prior to cancellation and it is determined by Centel there is another requirement for the facilities.

(B) where the applicant cancels an application for service prior to the start of special construction of facilities.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 16

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.4 Special Construction (Continued)

4.4.5 Where special construction has been started prior to cancellation, and there is no other requirement for the specially constructed facilities, a charge equal to the costs incurred in the special construction, less net salvage, applies; except that where one or more, but not all, of the services involved in the special construction are canceled, a charge equal to the cost, less net salvage, incurred for the discontinued services applies instead. Net salvage is determined based on the value of reusable material, less cost of removal. In determining the charge, each canceled service is treated as discontinued as of the date on which it was to have been placed in service.

Special construction of facilities for a customer is considered to have started when Centel incurs any expense which would not otherwise have been incurred; provided, (1) the customer has advised Centel to proceed with the installation, or (2) Centel has advised the customer that under his/her order it is commencing the installation.

4.5 Change in Service Arrangement

The normal service charge per channel applies when changing from one type of private line service to another type of private line service.

4.6 Suspension of Service

Upon request of the customer, service will be suspended without cancellation at any time after the minimum period of service. Service will be suspended for a period of not less than two weeks and billing shall continue at the full rate. For the purposes of this paragraph, the minimum service period shall be computed from the initial establishment of service or from the date the service was last restored from suspension.

4.7 Temporary Surrender of a Service

When, at the request of Centel, a service is temporarily surrendered by the customer, authorized user or joint user for other than maintenance purposes, credit will be allowed; the amount of which will be determined in the same manner as for an allowance for interruptions.

4.8 Allowances for Interruptions

In the event a customer's service is interrupted other than by the negligence or willful act of the customer, and it remains out of order for eight normal working hours or longer after access to the premises is made available and after being reported to be out of order, appropriate adjustments or refunds shall be made to the customer. The amount of adjustment or refund shall be determined on the basis of the known period of interruption, generally beginning from the time the service interruption is first reported. The refund to the customer shall be the pro rata part of the month's flat- rate charges for the period of days and that portion of the service facilities rendered useless or inoperative. The refund may be accomplished by a credit on a subsequent bill for telephone service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas d/b/a CenturyLink Section 1 (T) Original Sheet 17 REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.9 Cancellation of Application for Service

Regulations found in Section 4 of the General Customer Services Tariff, Cancellation of Order (N) Charge, apply in addition to the following: (N) Where installation of facilities other than those provided by special construction has been started prior to the cancellation, the charge specified in 4.9.1 or 4.9.2, following, whichever is lower, applies.

4.9.1 A charge equal to the estimated costs incurred in such installation, less estimated net salvage.

4.9.2 The charge for the minimum period of the service ordered by the customer as provided in this tariff plus the full amount of any termination charges applicable.

4.9.3 Installation of facilities for a customer is considered to have started when the Company incurs any expense in connection therewith or in preparation therefore, which would not otherwise have been incurred; provided the customer has advised the Company to proceed with the installation of facilities.

4.10 Distance Learning and Information Sharing Program Discounts

Upon submission of an affidavit that complies with the requirements of P.U.C. SUBST. R. §26.141 and HB2128, an educational institution or library may obtain a 25 percent discount on the tariffed rate for any tariffed service that is used predominantly for distance learning or information sharing programs.

"Distance learning" means instruction, learning and training that is transmitted from one site to one or more sites by telecommunications services that are used by an educational institution predominantly for such instruction learning or training, including video, data, voice and electronic information.

"Educational institution" means and includes: (a) accredited primary or secondary schools owned or operated by state and local governmental entities or private entities; (b) institutions of higher education as defined by Section 61.003, Education Code; (c) private institutions of higher education accredited by a recognized accrediting agency as defined by Section 61.003 (13), Education Code; (d) the Central Education Agency, its successors and assigns; (e) regional education service centers established and operated pursuant to Sections 11.32 and 11.33, Education Code; and (f) the Texas Higher Education Coordinating Board, its successors and assigns.

"Library" means a "public library" or "regional library system" as those terms are defined by Section 441.122, Government Code, or a library operated by an institution of higher education or a school district.

4.11 Service Date Change Requests

Section 4.11 of the General Customer Services Tariff applies when a customer requests a change of service date on a pending order for a Private Line service.

4.12 Expedited Order Requests

Section 4.13 of the General Customer Services Tariff applies when a customer requests a change of service date on a pending order that is earlier than the standard interval date for the service ordered.

ISSUED: May 1, 2017 EFFECTIVE: June 1, 2017 TX17-05 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 18

REGULATIONS

5. Definitions

Certain terms used generally throughout this tariff are defined as follows:

access line - In connection with special bridging service, that dedicated channel or channels connecting the master station, remote station, or connecting station to a special bridge.

accessories - Denotes devices which are mechanically attached to, or used with, the facilities furnished by Centel and which are independent of, and not electrically, acoustically, or inductively connected, to the conductors in the communications path of Centel facilities.

authorized protective connecting module - Denotes a protective unit designed by Centel and manufactured under the control of Centel quality assurance procedures, which unit is to be incorporated in a conforming answering device.

authorized user - Denotes a person, firm or corporation who is authorized by the customer to be connected to the service of the customer for the purpose of transmitting communications to or from the customer and relating directly to the customer business. An authorized user must be specifically named in the application for service and a station must be located on his/her premises.

base rate area - The portion of the exchange area in which exchange service is furnished at schedule rates for each class of service without mileage or construction charges.

baud - Denotes a unit of signaling speed. It is the reciprocal of the time duration in seconds of the shortest signal element (mark or space) within a code signal. The speed in bauds is the number of signal elements per second.

bridging - The connection of a channel or channels to another channel or the common point where more than two channels of any type connect.

building - "Same Building" is a structure under one roof, or two or more structures on the same premises which are connected by an enclosed passageway in which the wires or cables of Centel may be placed without exposure to outside electrical circuits or the weather. In no case can conduit be considered as an enclosed passageway. The term "same building" does not include those premises connected by a covered public mall. (See premises)

channel - Denotes a portion of a private line service which is a path (or paths) for electrical communication, between two or more stations or Centel serving offices or between a station and a serving office. A channel may be furnished in such manner as Centel may elect, whether by wire, radio or a combination thereof, and whether or not by means of a single physical facility or route.

channel terminal

(A) The facilities required to terminate an interexchange intraLATA channel or an interoffice channel at a serving office.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 19

REGULATIONS

5. Definitions (Continued)

communications systems - Denotes channels and other facilities which are capable, when not connected to private line services, of two-way communications between customer-provided terminal equipment.

composite data service - The combined use of terminal and data switching equipment provided by a composite data service vendor with the use of telecommunications services of Centel to perform data switching for others.

Composite Data Service Vendor - A customer that has been certificated by the proper state or municipal regulatory body, and/or the FCC pursuant to Section 214 of the Communications Act of 1934, as amended, to acquire and operate facilities to perform data switching for others. A customer shall be classified as a Composite Data Service Vendor only with respect to use of those exchange services which are used for the provision of composite data service.

conformance number - Denotes an identifying number assigned by the FCC to a particular model of conforming answering device incorporating an authorized protective connecting module when that model of device is in conformance with the provisions set forth by the FCC in its Technical Reference for conforming answering devices.

conforming answering device - Denotes a customer-provided device which automatically answers incoming calls; transmits a prerecorded voice message or appropriate audible signal to the calling party; records a voice message from the calling party if so designed and arranged; and automatically disconnects from the line in a prearranged manner or completion of the last of the functions for which it was designed and arranged as described in this paragraph. The conforming answering device may include remote interrogation and/or device function control. A conforming answering device must incorporate an authorized protective connecting module and must bear a valid conformance number.

connecting arrangement - Denotes the equipment provided by the customer to accomplish the direct electrical connection of customer-provided facilities with the facilities of Centel, or the direct electrical connection of Centel facilities.

connecting company - A corporation, association, firm or individual, owning and operating one or more exchanges and with whom traffic is interchanged.

contract - The service agreement between a customer and Centel under which facilities for communication between specified locations, for designated periods, and for the use of the customer, authorized user or joint user specifically named in the contract are furnished in accordance with the provisions of the tariff.

covered public mall - A covered public area, intended for the general public use, running between two or more premises and not an integral part of any building.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas d/b/a CenturyLink Section 1 (T) 1st Revised Sheet 20 Cancels Original Sheet 20 REGULATIONS

5. Definitions (Continued)

customer - the person, firm or corporation who orders service and is responsible for the payment of charges and the compliance with the regulations of the Company. A customer must have a (T) communications requirement of his own for each private line telephone service.

customer-provided terminal equipment - Devices, apparatus and their associated wiring, provided by a customer, authorized user or joint user for use with facilities furnished by the Company for private line (T) service and does not include customer-provided communications systems.

customer-provided test equipment - Denotes test equipment located at the premises of the customer that is used by the customer for the detection and/or isolation of a communications service fault.

data access arrangement - Denotes a protective connecting arrangement for use with the network control signaling unit, or, in lieu of the connecting arrangement, an arrangement to identify a central office line and protective facilities and procedures to determine compliance with criteria set forth in this tariff.

design service - A service that is not immediately available for provisioning and requires (N) treatment, equipment or engineering design (e.g. ISDN-PRI, DS1, Private Line, Foreign Exchange Service). (N)

ISSUED: May 1, 2017 EFFECTIVE: June 1, 2017 TX17-05 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 21 REGULATIONS 5. Definitions (Continued) direct electrical connection - Denotes a physical connection of the electrical conductors in the communications path. distance learning - Instruction, learning, and training that is transmitted from one site to one or more sites by telecommunications services that are used predominantly for such instruction, learning, or training, including video, data, voice, and electronic information. distribution center - Indicates amplifying and bridging equipment required to connect the various local sections of a music network or to connect local sections to an interexchange intraLATA section of the network. duplex service - Denotes service which permits customers, authorized users or joint users to communicate in both directions simultaneously. educational institution - Accredited primary or secondary schools owned or operated by state and local government entities or by private entities; institutions of higher education as defined by the Education Code, §61.003(13); the Central Education Agency, its successors and assigns; regional education service centers established and operated pursuant to the Education Code, §11.32 and §11.33; and the Texas Higher Education Coordinating Board, its successors and assigns. entrance facilities - Denotes the facilities required to extend customer-provided channels to a service point of the customer or authorized user. equalized - Denotes a procedure which provides for the component frequencies of the material transmitted having about the same relationship at the two ends of the channel. exchange - Denotes a unit established by Centel or a connecting company for the administration of telecommunication service in a specified area which usually embraces a metropolitan area, city, town or village and its environs. It consists of one or more serving offices together with the associated plant used in furnishing communication service within that area. exchange area - The area within which Centel will furnish complete telephone service at the exchange rates applicable within that area. foreign exchange - Exchange service furnished by means of a circuit connecting a customer's station to a primary serving office of another exchange. foreign serving office - Exchange service furnished by means of a circuit connecting a customer's station to a serving office of the same exchange but outside of the serving office area in which the station is located.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 22 REGULATIONS 5. Definitions (Continued) grandfathered communications systems - Denotes communications systems (including their equipment, premises wiring and protective circuitry, if any) connected at the customer's, authorized user's or joint user's premises, under any Centel tariff, and that are considered to be grandfathered under Part 68 of the FCC's Regulations because, (a) such systems were connected to the telecommunications network or to private line services specified in 6.2.2, following, prior to January 1, 1980, and were of a type of system which was directly connected (i.e., without Centel-provided connecting arrangements) to the telecommunications network or to private line services specified in 6.2.2, following, as of June 1, 1978, or (b) such systems are connected to the private line services specified in 6.2.3 or 6.2.4, following, prior to May 1, 1983, and are of a type system which was directly connected (i.e., without Centel-provided connecting arrangements) to private line services specified in 6.2.3 or 6.2.4, following, as of April 30, 1980. grandfathered connections of communications systems - Denotes connections via Centel-provided connecting arrangements of customer-provided communications systems (including their equipment and premises wiring) at the customer's, authorized user's or joint user's premises, under any Centel tariffs, and that are considered to be grandfathered under Part 68 of the FCC's Regulations because, (a) such connections to be telecommunications network or to private line services specified in 6.2.2, following, were made via Centel-provided connecting arrangements prior to January 1, 1980, and such connecting arrangements are of a type of connecting arrangement connected to the telecommunications network or to private line services specified in 6.2.2, following, as of June 1, 1978, or (b) such connections to private line services specified in 6.2.3 or 6.2.4, following, are made via Centel-provided connecting arrangements prior to May 1, 1983, and such connecting arrangements are of a type of connecting arrangement connected to private line services specified in 6.2.3 or 6.2.4, following, as of April 30, 1980. grandfathered terminal equipment - Denotes terminal equipment (including protective circuitry, if any) connected at the customer's, authorized user's or joint user's premises, under any Centel tariff, and that is considered to be grandfathered under Part 68 of the FCC's Regulations because, (a) such terminal equipment was connected to the telecommunications network or to private line services specified in 6.2.2, following, prior to July 1, 1979, and was of a type of terminal equipment which was directly connected (i.e., without Centel-provided connecting arrangements) to the telephone communications network or to private line services specified in 6.2.2, following, as of October 17, 1977, or (b) such terminal equipment is connected to private line services specified in 6.2.3 or 6.2.4, following, prior to May 1, 1983, and is of a type of terminal equipment which was directly connected (i.e., without Centel-provided connecting arrangements) to private line services specified in 6.2.3 or 6.2.4, following, as of April 30, 1980.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 23 REGULATIONS 5. Definitions (Continued) grandfathered connections of terminal equipment - Denotes connections via Centel-provided connecting arrangements of customer-provided terminal equipment connected at the customer's, authorized user's or joint user's premises, under any Centel tariff, and that are considered to be grandfathered under Part 68 of the FCC's Regulations because, (a) such connections to the telecommunications network or to private line services specified in 6.2.2, following, were made via Centel-provided connecting arrangements prior to July 1, 1979, and such connecting arrangements are of a type of connecting arrangement connected to the telecommunications network or to private line services specified in 6.2.2, following, as of October 17, 1977, or (b) such connection to private line services in 6.2.3 or 6.2.4, following, are made via Centel-provided connecting arrangements prior to May 1, 1983, and such connecting arrangements are of a type of connecting arrangement connected to private line services specified in 6.2.3 or 6.2.4, following, as of April 30, 1980. half-duplex service - Denotes service which permits communication alternately in either direction, or for communication in one direction only, including bidirectional simultaneous transmission of tones required solely for control purposes or quick turnaround or synchronization. inside wire and cable - Those facilities furnished in connection with private line services from the building main or floor terminal, frame, or protector to the station equipment on the customer's premises. interactive multimedia communications - Real-time, two way, interactive voice, video, and data communications conducted over networks that link geographically dispersed locations. This definition includes interactive communications within or between buildings on the same campus. interconnecting station - In connection with special bridging service, one of the many stations on a multipoint network which is connected to a special bridge and is provided for connecting two special bridges together through customer-owned and maintained equipment located at a remote station. interexchange intraLATA channel - That portion of a private line service which interconnects two primary serving offices in different exchanges or metropolitan exchanges, within the LATA. interexchange intraLATA service - A private line service where the points of interconnection located on customer premises are in different exchanges or metropolitan exchanges, within the LATA. interface - Denotes that point on the premises of the customer, authorized user or joint user at which provision is made for connection of other than Centel-provided facilities to facilities provided by Centel. interoffice channel - That portion of a private line service which interconnects, (1) local channels in different serving offices associated with intraexchange service; or, (2) interexchange channels. intraexchange service - A private line service where all the points of interconnection are wholly within an exchange or a metropolitan exchange as defined in the Local Exchange Tariff. intraLATA service - private line service where the points of interconnection located on customer's premises are all within the same LATA.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 24 REGULATIONS 5. Definitions (Continued) joint user - The person, firm or corporation who is designated by the customer as a user of a private line service of the customer under tariff provisions who would not otherwise be entitled to use the customer's service. LATA - Local access and transport area (LATA) denotes a geographic area established for the administration of telecommunications service. It encompasses designated local operating telephone company exchanges which are grouped to serve common social, economic and miscellaneous purposes. local channel - That portion of a private line service which interconnects a station location to (1) an interexchange or interoffice channel; or (2) another station location on a different premises in the same serving office area, via another local channel to the station on a different premises. master station - In connection with special bridging service, the one station of a multipoint network located on a customer's premises, which communicates with each remote station. move - When used in connection with the application of move service charges for private line service, denotes a change in the physical location on the same premises, when made at the request of the customer, authorized user or joint user, without discontinuance of service, of facilities and items of equipment provided by Centel.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 25 REGULATIONS 5. Definitions (Continued) multiline terminating system area - Denotes a premises or multi-premises within the same building or continuous property in resold or shared use arrangements for customer premises key equipment or customer premises switching equipment. multipoint service – Denotes a service arrangement which provides communications capability between more than two private line station locations constituting a common dedicated communications system. multiunit installation - For point of interconnection purposes, denotes a facility arrangement configured for either more than one customer in a building or more than one premises on a legal unit of property. Multiunit installations include (but are not limited to): - Multifamily residential apartments, condominiums, townhouses, or duplexes; - Multitenant commercial, shopping center and campus situations; and - Any other facility arrangement not classified as single unit. network control signaling - Denotes the transmission of signals used in the telecommunications system which perform functions such as supervision (control, status, and charging signals), address signaling (e.g., dialing), calling and called number identification, audible tone signals (call progress signals indicating reorder or busy conditions, altering, coin denominations, coin collect and coin return tones) to control the operation of switching machines in the telecommunications systems. network control signaling unit - Denotes the network channel termination equipment furnished by Centel for network control signaling. network interface - Point of connection between Centel communications facilities and terminal equipment, protective apparatus or wiring at a customer's premises. The Centel-installed facilities at, or constituting, the point of interconnection shall consist of wire or a jack conforming to Subpart F of Part 68 of the FCC Rules. nonpowered-conferencing equipment - Denotes a portable plug-ended device, without active elements, consisting of a multi-winding transformer and manual line switches designed to bridge two or more, but not to exceed five, of the lines appearing on 4-button and 6-button key telephone instruments equipped with both hold and illumination features.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 26 REGULATIONS 5. Definitions (Continued) other line charge - The charge applied by another LEC for the portion of an interexchange channel which it furnishes. The "other line" charge added to Centel's charge for the portion of the interexchange service which it furnishes is the through charge for the entire interexchange service furnished jointly by Centel and the connecting LEC. other telephone company - See connecting company. point of interconnection - See network interface. premises - 1. All portions of the same building occupied by the same customer, provided that: a. The portions are not separated from each other by intervening offices, rooms or suites not occupied by the customer. b. The portions of different floors are contiguous and that the portion on the upper floor is directly above the portion occupied on the lower floor. 2. All of the buildings occupied by the same customer, provided that: a. All of the buildings are located on the same continuous property, which is owned and/or leased by the same customer, and are not separated by a public highway. Note: A public highway is considered to mean a vehicular thoroughfare which is governmentally-owned. premises wiring - Wiring on the customer's side of the point of interconnection provided for use with service components furnished by Centel for private line service. primary serving office - That office in a single office service area or that office of a multi-office service area which is designated by Centel as the primary serving office. A primary serving office is also a serving office. In a service area where there is not physically located a serving office, a theoretical location has been established by Centel for billing purposes. 1. Category "A" primary serving offices when used in connection with Series 300 and 400 channels denotes primary serving offices designated on the basis of interexchange channel facility characteristics. Category "A" primary serving offices are listed in 7.2.7 and 7.2.8. 2. Category "B" primary serving offices when used in connection with Series 300 and 400 channels denotes primary serving offices other than Category "A" serving offices. private line service - Channels and other facilities (when provided by Centel), provided solely for the use of a customer, and his/her authorized users and joint users. registered - Denotes equipment which complies with and has been approved within the Registration provisions of Part 68 of the FCC's Regulations. remote station - In connection with special bridging service, one of the many stations on a multipoint network which is connected to the master station by a bridging arrangement.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 27 Cancels Original Sheet 27

REGULATIONS

5. Definitions (Continued)

served direct service - Those facilities provided for specified two-point intraexchange channels between different buildings on different premises which do not route through a serving office.

service area - An exchange or a zone of a metropolitan exchange.

service point - When used in connection with private line services, denotes the service area in which a station of the customer, authorized user or joint user is located.

When used in connection with customer systems, denotes the point of interconnection on the customer, authorized user or joint user's premises where private line services provided by the (T) Company to the customer, authorized user or joint user are terminated for communications with (T) stations or customer-provided terminal equipment located on the premises. Where a station is not located in an exchange area, the location of the station or termination is considered to be an exchange for the purpose of this definition.

serving office - The office in the service area from which a customer would normally be served for local exchange telephone service. Where the serving office is not located in the service area, a theoretical location has been established by The Company for billing purposes. (T)

serving office area - The specific area normally served by a serving office. A serving office area may be served in several ways, namely;

1. By a single unit serving office with one telephone number prefix.

2. By a multiple unit serving office with multiple telephone number prefixes.

3. By a theoretical serving office with switching equipment located in another exchange or serving office area.

single unit installation - For point of interconnection purposes, denotes a facility arrangement configured to accommodate a single customer. All other facility arrangements are classified as multiunit installations. Single unit installations include (but are not limited to):

- Single family dwellings;

- Single business premises; and

- Other single customer installations on one property, undivided by public thoroughfares (e.g., educational, industrial, government or medical premises).

special design service – See “Design Service” (N)

ISSUED: May 1, 2017 EFFECTIVE: June 1, 2017 TX17-05 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 28 REGULATIONS 5. Definitions (Continued) station - Denotes a point of interconnection on a premises at which a private line service is terminated where the service at that premises involves only channels furnished by Centel and the transmitting or receiving equipment, or combination transmitting and receiving equipment, is furnished by the customer, authorized user or joint user. station port - A station port is the classification of the station interface for off-premises main stations or extension stations of a premises PBX (or similar) switching system used in reference to loop signaling requirements on grandfathered and registered PBX systems. studio - When used in connection with private line service for wired music distribution, indicates fixed premises of a customer at which personnel of the customer are present and from which audio material regularly originates or is received for closed circuit transmission to wired music locations. The term studio excludes all locations where the subject matter to be transmitted is not originated primarily for wired music distribution. Telecommunication Service Priority System (TSP) - The TSP System is a service developed to meet the requirements of the Federal Government for the priority installation and/or restoration of National Security Emergency Preparedness (NSEP) telecommunications services. termination - When used in connection with the application of termination charges for private line services, denotes the discontinuance, either at the request of the customer, authorized user or joint user, or by Centel under its regulations concerning cancellation for cause, of service or facilities provided by Centel. zone - A portion of a metropolitan exchange which has one primary serving office and is further described in the Local Exchange Tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 29 Cancels Original Sheet 29

REGULATIONS

6. Connections of Terminal Equipment and Communications Systems

6.1 General Provisions

6.1.1 General

(A) Terminal equipment, communications systems and premises cable and wire on the customer's side of the point of interconnection may be connected at the customer's premises to private line services furnished by Centel where such connections are made under the provisions of 1.4, preceding, and 6. (T) (D) (B) The term "Telecommunications Services" when used in 6, denotes exchange service and (D) long distance message telecommunications service (LDMTS).

6.1.2 Responsibility of the Customer

(A) The customer shall be responsible for the installation, operation and maintenance of any customer, authorized user, joint user, or other common carrier-provided terminal equipment, communications systems or premises cable and wire on the customer's side of the point of interconnection. No combination of customer-provided terminal equipment, communications systems or premises cable and wire on the customer's side of the point of interconnection shall require change in or alteration of the equipment or services of Centel, cause electrical hazards to Centel personnel, damage to Centel equipment, malfunction of Centel billing equipment, or degradation of service to persons other than the user of the subject terminal equipment or communications system, his calling or called party. Upon notice from Centel that customer-provided terminal equipment, communications systems or premise cable and wire on the customer's side of the point of interconnection is causing such hazards, damage, malfunction or degradation of service, the customer, authorized user, or joint user shall make such change as shall be necessary to remove or prevent such hazard, damage, malfunction or degradation of service.

(B) When the customer, authorized user, or joint user provides his own data set on a given Centel-provided private line, it shall be the responsibility of the customer to ensure the continuing compatibility of such data set with the private line service furnished by Centel.

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 30 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.1 General Provisions (Continued) 6.1.2 Responsibility of the Customer (Continued) (C) The customer shall be responsible for the payment of a nonrecurring Maintenance of Service Charge for each repair visit to a premises of the customer, authorized or joint user or the premises of any other customer where the service difficulty or trouble results from the use of equipment or facilities provided by the customer, authorized user or joint user on the customer's side of the point of interconnection. Nonrecurring Charge Maintenance of Service Charge $30.00 (D) The customer who provides the premises wiring of communications systems subject to Part 68 of the FCC's Regulations under Section 68.215 of Chapter 1 of Title 47 of that Code of Federal Regulations shall be responsible for the payment of an institutional program for premises wiring charge as provided below for activities performed by Centel employees at the customer's premises under subsections (f), (g) and/or (h) of said Section 68.215, when the premises wiring in question has failed acceptance tests monitored by, or participated in by, Centel under Section 68.215, and/or has been revealed to be not in conformance with the information provided in the related affidavit which was provided pursuant to Section 68.215, and/or has resulted in harm to the network. The institutional program for premises wiring charge provided for above is comprised of the first, or a combination of both rate elements described below, as appropriate: Element 1 - for the first fifteen minutes, or fraction thereof, of total time spent by Centel employees in related monitoring or participation in acceptance tests and/or in related inspection of customer-provided premises wiring for communications systems subject to Part 68 of the FCC's Regulations, and for administrative expenses including the visit to the customer's premises. Element 2 - for each additional fifteen minutes, or major fraction thereof, of total time spent by Centel employees in performing the related customer-provided premises activities described in Element 1, preceding. IPPW Charge Nonrecurring USOC Element 1 $ 35.80 EPC1E Element 2 10.25 EPCAE (E) The consent of the customer must be obtained by the authorized user or joint user prior to the connection of authorized user or joint user provided terminal equipment or communications systems to a private line service provided to the customer.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 31 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.1 General Provisions (Continued) 6.1.3 Responsibility of Centel (A) Private line services are not represented as adapted to the use of customer, authorized user, joint user, or other common carrier-provided terminal equipment, communications systems or premises cable and wire on the customer's side of the point of interconnection. Where such terminal equipment, communications systems or premises cable and wire on the customer's side of the point of interconnection are used with private line services, the responsibility of Centel shall be limited to the furnishing of service components suitable for private line services and to the maintenance and operation of service components in a manner proper for such services up to, and including the point of interconnection. Subject to this responsibility Centel shall not be responsible for (a) the through-transmission of signals generated by the customer-provided terminal equipment or communications systems or for the quality of, or defects in, such transmission, or (b) the reception of signals by customer-provided terminal equipment or communications systems, or (c) address signaling where such signaling is performed by customer-provided signaling equipment. (B) Centel will, at the customer's request, provide information concerning interface parameters, including the number of ringers which may be connected to a particular line, needed to permit customer-provided terminal equipment to operate in a manner compatible with the telecommunications network. (C) Centel may make changes in its telecommunications network, equipment, operations or procedures, where such action is not inconsistent with Part 68 of the FCC's Regulations. If such changes can be reasonably expected to render any customer's terminal equipment, communications system or premises cable and wire on the customer's side of the point of interconnection incompatible with the telecommunications network, or require modification or alteration of such customer-provided terminal equipment, communication systems or premises cable and wire on the customer's side of the point of interconnection, or otherwise materially affect its use or performance, the customer, authorized user, joint user, or other common carrier will be given adequate notice in writing, to allow the customer an opportunity to maintain uninterrupted service. 6.1.4 Recording of Two-Way Telephone Conversations Private line services are not represented as adapted to the recording of two-way telephone conversations. When customer-provided voice recording equipment is used with a private line service which is connected to telecommunications services, the provisions relating to Recording of Two-Way Telephone Conversations, as set forth in Section 15 of the General Customer Services Tariff, are applicable to such private line service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 32 REGULATIONS

6. Connections of Terminal Equipment and Communications Systems (Continued)

6.1 General Provisions (Continued)

6.1.5 Violation of Regulations

When any customer, authorized user, joint user, or other common carrier-provided terminal equipment, communications systems or premises cable and wire on the customer's side of the point of interconnection is used with private line services in violation of any of the provisions in 6, Centel will take such immediate action as necessary for the protection of the telecommunications network and Centel employees, and will promptly notify the customer, authorized user, joint user, or other common carrier of the violation. The customer shall take such steps as are necessary to discontinue such use of the terminal equipment, communications systems or premises cable and wire on the customer's side of the point of interconnection or correct the violation and shall confirm in writing to Centel within ten days, following the receipt of written notice from Centel, that such use has ceased or that the violation has been corrected. Failure to discontinue such use or to correct the violation and to give the required written confirmation to Centel within the time stated above shall result in suspension of the customer's service until such time as there is compliance with the provisions of this tariff.

Connections of Facilities Furnished by the Customer Which Involve Hazardous or Inaccessible Locations

Facilities furnished by the customer which involve hazardous or inaccessible locations may be connected with private line service furnished by Centel. Such facilities furnished by the customer must comply with the minimum protection criteria contained in 6.4.6.

6.2 Connections of Registered Equipment

6.2.1 Registered terminal equipment, protective circuitry and communications systems may be connected on the customer's side of the point of interconnection to private line services specified in 6.2.2, 6.2.3 or 6.2.4, following, subject to 6.1, preceding, and this 6.2 and Section 15, Connections of Registered Equipment, in the General Customer Services Tariff.

6.2.2 The connection may be made only at the premises of the customer, authorized user, or joint user to Series 300 or 400 private line service that present a two-wire loop signaling interface for such connection under the following conditions:

(A) Registered terminal equipment, protective circuitry, and key telephone systems may be connected to the station end of private line services furnished in connection with off- premises stations.

(B) Registered PBX systems may be connected, as a trunk termination, to the station end of private line services furnished in connection with off-premises stations.

(C) Registered terminal equipment, protective circuitry, and key telephone systems may be connected to common control switching arrangement (CCSA) access lines.

A foreign exchange channel may be used with customer-provided registered terminal equipment, registered protective circuitry and registered communication systems which are connected to the exchange telephone service associated with such channels.

Reference to joint user in 6.2.2, above, is not applicable to foreign exchange.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 33 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.2 Connections of Registered Equipment (Continued) 6.2.3 The connection of registered terminal equipment and registered PBX systems may be made only at the premises of the customer, authorized user, or joint user to a Series 300 or 400 private line service that presents an interface for two-wire transmission, with separate E and M signaling leads conventionally known as Type I (battery/ground) or Type II (contact closure type). Such E and M signaling leads are those terminal equipment or PBX leads (other than voice or data communications leads) used for the purpose of transferring supervisory or address signals across the interface. 6.2.4 The connection of customer-provided registered terminal equipment and registered PBX systems may be made only at the premises of the customer, authorized user, or joint user to a Series 100, 300 or 400 private line service furnished to provide indications of message registration of outgoing calls or automatic identification of outward dialing (AIOD) to such customer-provided equipment or systems. In addition, customers who intend to install, make additions to, or make rearrangements of AIOD functions shall give advance notice to Centel under the procedures specified in Part 68 of the FCC's Regulations or as otherwise authorized by the FCC. 6.2.5 Unless a specific waiver has been granted by the FCC, or except as otherwise provided in 6.2.6 following, all connections of registered equipment to services furnished by Centel will be made through a point of interconnection. In most cases, this will be through a Centel-provided standard jack. In the case of registered communications systems utilizing complex wiring, a method of connection, jacks, terminal strips, etc., will be provided by Centel. 6.2.6 The requirement for the use of standard jacks as described in 6.2.5 preceding is waived for registered equipment which is located in hazardous or inaccessible locations. 6.3 Connections of Grandfathered Terminal Equipment and Grandfathered Communications Systems 6.3.1 Direct Connections (A) Grandfathered terminal equipment and grandfathered communications systems directly connected to private line services specified in 6.2.2, preceding, are subject to Section 15, Connections of Grandfathered Terminal Equipment and Grandfathered Communications Systems of the General Customer Services Tariff. Such connections are subject to the minimum protection criteria set forth in 6.4.6, following.

(B) Grandfathered terminal equipment and grandfathered communications systems, directly connected to the private line services specified in 6.2.3 and 6.2.4, preceding, on April 30, 1980, may remain connected for the life of the equipment without registration, and may be modified only under Part 68 of the FCC’s Regulations, subject to the following. (1) All such connections shall comply with the minimum protection criteria set forth in 6.4.6, following. (2) No changes may be made to equipment so connected except by the manufacturer thereof, or a duly authorized agent of the manufacturer.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 34 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.3 Connections of Grandfathered Terminal Equipment and Grandfathered Communications Systems (Continued) 6.3.1 Direct Connections (Continued) (C) Until May 1, 1983, new installations of terminal equipment or communications systems which have been grandfathered may be connected for use with the private line services specified in 6.2.3 or 6.2.4, preceding, subject to the following. (1) The customer shall notify Centel when such equipment or systems are to be connected and shall notify Centel when such equipment or systems are to be permanently disconnected; such notification shall include a description of the equipment including the manufacturer's name, model number, and type of equipment. (2) All such connections are made through Centel-provided standard jacks, or are otherwise connected by Centel. (3) All such connections shall comply with the minimum protection criteria set forth in 6.4.6, following. (4) Premises wiring associated with communications systems shall conform to Part 68 of the FCC's Regulations. (5) No changes may be made to equipment so connected except by the manufacturer thereof, or a duly authorized agent of the manufacturer. (D) Additions to grandfathered terminal equipment or grandfathered communications systems specified in 6.3.1(B) or 6.3.1(C), preceding, may be made, subject to 6.3.1(C)(1) through 6.3.1(C)(5), preceding, and to the following. (1) Until May 1, 1983, where the equipment being added is of a type which has been grandfathered. (2) After May 1, 1983, where the equipment being added is grandfathered. (3) Additions of registered equipment are subject to 6.2, preceding. (E) Systems connected pursuant to 6.3.1(B) through 6.3.1(D), preceding, may remain connected and be moved and reconnected, under 6.3.1(C)(1) through 6.3.1(C)(5), preceding, for the life of the equipment and may be modified only under Part 68 of the FCC's Regulations. (F) Customer-provided terminal equipment and customer-provided communications systems connected via customer-provided grandfathered protective circuitry are subject to the provisions of 6.3.1(A) through 6.3.1(E), preceding.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 35 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.3 Connections of Grandfathered Terminal Equipment and Grandfathered Communications Systems (Continued) 6.3.2 Connections Through Connecting Arrangements Provided by Centel (A) Grandfathered connections of terminal equipment and grandfathered connections of communications systems to private line services specified in 6.2.2, preceding, are subject to Section 15, Connections of Grandfathered Terminal Equipment and Grandfathered Communications Systems of the General Customer Services Tariff. Such connections are subject to the minimum protection criteria set forth in 6.4.6, following. (B) Grandfathered connections of terminal equipment and grandfathered connections of communications systems to the private line services specified in 6.2.3 and 6.2.4, preceding, are subject to the following: (1) Until May 1, 1983, Centel will provide connecting arrangements for installations of new customer-provided terminal equipment or communications systems that are subject to Part 68 of the FCC's Regulations. However, after May 1, 1983, Centel- provided connecting arrangements will only be provided, to the extent that such connecting arrangements are available, to reconnect terminal equipment or communications systems which were previously connected to the private line services specified in 6.2.3 or 6.2.4, preceding, through connecting arrangements prior to May 1, 1983. (2) Grandfathered connections of terminal equipment and grandfathered connections of communications systems made under 6.3.2(B)(1), preceding, may remain connected and be moved and reconnected for the life of the equipment and may be modified only under Part 68 of the FCC's Regulations. Connecting arrangements used for such moves and reconnections will continue to be provided by Centel subject to their availability, at the rates and charges specified in Section 15, of the General Customer Services Tariff. (3) Network control signaling shall be performed by the connecting equipment furnished, installed and maintained by Centel, except that customer-provided tone- type address signaling is permissible through Centel-provided connecting arrangement. (4) The connections specified in 6.3.2(B)(1) through 6.3.2(B)(3), preceding, must comply with the minimum protection criteria specified in 6.4.6, following.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 36 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC’s Registration Program 6.4.1 General (A) Connecting arrangements are not required and minimum protection criteria are not applicable where customer-provided terminal equipment or communications systems are connected with the following channels when such channels are used for the types of transmission specified herein due to the nature of the service provided and/or the type of channels and equipment used. - Series 100 - Series 200 - Series 400 - Series 600 - Video Channels (provided via special service request for closed circuit TV) (B) Except as otherwise provided in 6.2 and 6.3, preceding, customer-provided terminal equipment and communications systems may be electrically connected to private line services under this 6.4. (1) When the customer-provided terminal equipment or communications system is connected with private line service furnished by Centel and such private line service is not arranged for connection to telecommunications services, such connections shall be made to a point of interconnection provided by Centel. (2) When the customer-provided terminal equipment or communications system is connected with private line service furnished by Centel and such private line service is arranged for connection to telecommunications services: (a) except as otherwise specified in 6.4.4(A) (4), following, such connections shall be made through a connecting arrangement as provided in this 6.4, and (b) the connection shall be such that the functions of network control signaling (except customer-provided tone-type address signaling through a Centel- provided connecting arrangement) are performed by equipment furnished by Centel. (c) Customer-provided terminal equipment or communications systems connected under 6.4.1(B) (1) or 6.4.1 (B) (2), preceding, must comply with the minimum protection criteria specified in 6.4.6, following.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 37 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.2 Data Terminal Equipment (A) Direct Electrical Connection (1) Customer-provided data terminal equipment which involves direct electrical connection to facilities furnished for private line service by Centel, may be used with such facilities for such purpose under the conditions set forth below: (a) The customer shall be responsible for ordering and specifying the type of channel and the channel conditioning for operation with data processing equipment provided by the customer, authorized user or joint user. (b) Except as otherwise specified in (c) and (d), following, when the connection of customer-provided data terminal equipment requires the use of data sets, the data sets may be provided by either the customer, authorized user or joint user; except that, Centel shall furnish all data sets located on the premises of Centel. Where the customer, authorized user or joint user elects to provide his own data sets on a given private line service, it shall be the responsibility of the customer, authorized user or joint user to ensure the continuing compatibility of such data sets with the facilities furnished by Centel. (c) To protect the telecommunications network, the connection of customer- provided data terminal equipment to private line service provided by Centel, when such private line service is arranged for connection to telecommunications services shall be through a connecting arrangement as described below. - DATA ACCESS ARRANGEMENT Where the customer elects to use customer-provided data terminal equipment through a data access arrangement, the customer, authorized user or joint user shall furnish the equipment which performs the functions of data signal conditioning and Centel shall furnish the data access arrangement for use with the network control signaling unit. (d) Where a data access arrangement is furnished with customer-provided terminal equipment and such terminal equipment is used for both voice and data communications, the data access arrangement may be used to connect the customer-provided equipment for voice communication.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 38 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.3 Voice Terminal Equipment (A) Customer-provided voice terminal equipment may be connected at the customer's premises to private line service per the following, when such private line service is arranged as provided in 6.4.1(B)(2), preceding. (1) The connection shall be made through a network control signaling unit and a connecting arrangement furnished by Centel. (2) Where a data access arrangement is furnished in connection with customer- provided terminal equipment and such terminal equipment is used for both voice and data communication, the data access arrangement may be used to connect the customer-provided terminal equipment for voice communication. (B) Attested equipment and conforming answering devices may be used with private line service. 6.4.4 Communications Systems (A) Customer-provided communications systems (other than communications systems connected pursuant to 6.2 and 6.3, preceding) may be connected to private line service per this 6.4.4(A). These communications systems (including channels derived from such systems, not exceeding voice grade), may be connected at the customer, authorized user or joint user's premises where the customer has a regular and continuing requirement for the origination or termination of communications over the customer-provided communications system provided that: (1) The normal mode of operation of the customer-provided communications system shall be to provide communications originating or terminating at the premises on which the connection is made. (2) The connection shall be made through switching equipment provided either by the customer, or authorized user. (3) The connection shall be to channels of voice grade or less or to channels created therefrom in accordance with the provisions of 6.5, following.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 39 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.4 Communications Systems (Continued) (A) (Continued) (4) When the private line service is arranged as provided in 6.4.1.(B) (2), preceding, the connection is made through: (a) a connecting arrangement provided by Centel, or (b) registered or grandfathered terminal equipment, communications system, or protective circuitry which, either singularly or in combination assures that the requirements of Part 68 of the FCC's Regulations are met at the point of interconnection. Minimum protection criteria as set forth in 6.4.6, following, must be complied with when the connection is made through equipment or systems that are not registered. In lieu of these requirements for total hardware protection, an optional, alternative method, as described in 6.4.4(A) (5), following, is available for the control of signal power only. (5) When customer-provided communications systems not subject to Part 68 of the FCC's Regulations are connected to private line services that are arranged as provided in 6.4.1(B) (2), preceding, and the connection is through (a) a Centel- provided connecting arrangement or, (b) registered or grandfathered terminal equipment, communications system or protective circuitry which assures that all of the requirements of Part 68 of the FCC's Regulations are met at the point of interconnection, no further action is required. However, when a customer elects to connect a communications system to private line service and the registered or grandfathered equipment, system or protective circuitry through which connection is made does not provide protection for signal power control, the customer must comply with the following institutional procedures: (a) The customer-provided communications system must be installed, operated and maintained so that the signal power (within the frequency range of 200- 4000 Hertz) at the point of interconnection continuously complies with Part 68 of the FCC's Regulations.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 40 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.4 Communications Systems (Continued) (A) (Continued) (5) (Continued) (b) The operator/maintainer responsible for the establishment, maintenance and adjustment of the voice frequency signal power present at the point of interconnection must be trained to perform these functions by successfully completing one of the following: - a training course provided by the manufacturer of the equipment used to control voice frequency signal power; or - a training course provided by the customer or authorized representative, who has responsibility for the entire communications system, using training materials and instruction provided by the manufacturer of the equipment used to control the voice frequency signal power; or - an independent training course (e.g., trade school or technical institution) recognized by the manufacturer of the equipment used to control the voice frequency signal power; or - in lieu of the preceding training requirements, the operator/maintainer is under the control of the supervisor trained per 6.4.4(A) (5) (b). Upon request, the customer is required to provide the proper documentation to demonstrate compliance with the requirements in this 6.4.4(A) (5) (b).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 41 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and CommunicationsSystems Not Subject to the FCC's Registration Program (Continued) 6.4.4 Communications Systems (Continued) (A) (Continued) (5) (Continued) (c) At least ten days advance notice must be given to Centel in the form of a notarized affidavit before the initial connection of the customer-provided communications system. A copy of the affidavit must also be maintained at the customer's premises. The affidavit must contain the following information: - The full name, business address, business telephone number and signature of the customer or authorized representative who has responsibility for the operation and maintenance of the communications system. - The line which the communications system will be either connected to or arranged for connection to. - A statement that all operations associated with the establishment, maintenance and adjustment of the signal power present at the point of interconnection will comply with Part 68 of the FCC's Regulations. - A statement describing how each operator/maintainer of the communications system will meet and continue to meet the training requirements for persons installing, adjusting or maintaining the communications system. (6) Extraordinary Procedures (a) Centel may invoke extraordinary procedures to protect the private line service where one or more of the following conditions are present: - Information provided in the affidavit gives reason to believe that a violation of Part 68 of the FCC's Regulations or the institutional procedures set forth in 6.4.4(A) (5) (a), preceding, is likely. - Harm has occurred and there is reason to believe this harm was a result of operations performed under the institutional procedures set forth in 6.4.4(A) (5), preceding.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 42 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.4 Communications Systems (Continued) (A) (Continued) (6) Extraordinary Procedures (Continued) (b) The extraordinary procedures, which can be invoked by Centel, include: - Requiring the use of protective apparatus which either protects solely against signal power or which assures that all of the requirements of Part 68 are met at the point of interconnection. This protective apparatus may be provided by either Centel or the customer. - Disconnecting service. (c) A charge equal to the Maintenance of Service Charge as provided in 6.1.2(C), preceding, will apply when; - It is necessary to send a Centel employee to the premises where the connection is made because a condition set forth in 6.4.4(A) (6) (a), preceding, exists, and - A failure to comply with Part 68 of the FCC's Regulations or the institutional procedures for signal power control in 6.4.4(A) (5), preceding, is disclosed. (B) An entrance facility channel or channels created therefrom under the provisions of 6.5, following, may be connected at such customer's or user's premises to other customer- provided communications systems in accordance with (A), (A) (1), (A) (2) and (A) (4), preceding. (C) At the customer's request and where a private line is arranged for joint use as set forth in 9, following, a joint user of such service may connect his own communications system to such jointly used private line on the same basis as set forth in 6.4.1(B) and 6.4.4(A), preceding, and 6.4.6, following.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 43 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.4 Communications Systems (Continued) (D) A communications system provided by an authorized user may be connected at the premises of the authorized user to private line service furnished by Centel to a customer on which the authorized user has a station provided that: (1) The customer has a regular and continuing requirement for communications originating or terminating at the authorized user's premises at which the connection is made. (2) The normal mode of operation of the authorized user-provided communications system shall be to provide communications originating or terminating at the premises on which the connection is made. (3) The connection shall be made through switching equipment provided by the customer or authorized user or by Centel. (4) The connection shall be to channels of voice grade or less or to channels created therefrom under the provision of 6.5, following. (5) The connection shall be made on the same basis as set forth for the customer in 6.4.1(B), preceding, and 6.4.6, following. (6) All communications over the interconnected facilities shall be between the customer and authorized user and relate directly to the customer's business. 6.4.5 Accessories Accessories provided by a customer may be used with private lines service provided that such accessories comply with the provisions of 6.1.2 and 6.4.1(B)(2)(b), preceding.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 44 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.6 Minimum Protection Criteria for Electrical Connections (A) Since private line services use Centel channels and equipment in common with other services, it is necessary in order to prevent excessive noise and crosstalk, that the power of the signal applied to Centel private line service be individually engineered. Because each private line service is individually engineered a single valued limit for all applications cannot be specified. Therefore, the power of the signal in the band above 300 Hertz (Hz) which may be applied by the customer-provided equipment to the point of interconnection will be specified by Centel for each application to be consistent with the signal power allowed on the telecommunications network. (B) To protect other services, it is necessary that the signal which is applied by the customer- provided equipment to the Centel point of interconnection located on the customer's premises meet the following limits: (1) The power in the band from 3,995 Hz to 4,005 Hz shall be at least 18db below the power of the signal as specified in 6.4.6(A), above. (2) The power in the band from 4,005 Hz to 10,000 Hz shall not exceed 16db below one milliwatt. (3) The power in the band from 10,000 Hz to 25,000 Hz shall not exceed 24db below one milliwatt. (4) The power in the band from 25,000 Hz to 40,000 Hz shall not exceed 36db below one milliwatt. (5) The power in the band above 40,000 Hz shall not exceed 50db below one milliwatt. (C) Where there is connection to telecommunications services, to prevent the interruption or disconnection of a call, or interference with network control signaling, it is necessary that the signal applied by the customer-provided equipment to the Centel point of interconnection located on the customer's premises at no time have energy solely in the 2450 to 2750 Hz band. If signal power is in the 2450 to 2750 Hz band, it must not exceed the power present at the same time in the 800 to 2450 Hz band.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 45 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.4 Connections of Customer-Provided Terminal Equipment and Communications Systems Not Subject to the FCC's Registration Program (Continued) 6.4.6 Minimum Protection Criteria for Electrical Connections (Continued) (D) Where customer-provided equipment applies signals having components in the frequency spectrum below 300 Hz, excluding ringing signals, the currents and voltages (including all harmonics and spurious signals) at the point of interconnection shall not exceed the limits indicated in 6.4.6(D) (1) through 6.4.6(D) (4), following. (1) The maximum root-mean-square (rms) value, including dc and ac components of the current per conductor, will be specified by Centel but in no case will the specified value exceed 0.35 ampere. (2) The magnitude of the peak of the conductor to ground voltage shall not exceed 70 volts. (3) The conductor to conductor voltage shall be such that the conductor to ground voltage limit in 6.4.6(D) (2), above, is not exceeded. If the signal source is not grounded, the voltage limit in 6.4.6 (D) (2), above, applies to the conductor to conductor voltage. (4) The total weighted rms voltage within the band from 50 Hz to 300 Hz shall not exceed 100 volts. The total weighted rms voltage is the square root of the sum of the products of the weighting factors for the individual frequency components times the square of the rms voltage of the individual frequency components. The weighting factors are as indicated: for frequencies between weighting factor 50 Hz and 100 Hz f2/104 100 Hz and 300 Hz f3.3/106.6 where f is the numerical value of the frequency in Hz, of the frequency component being weighted.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 46 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.5 Channel Derivation Devices Customer-provided channel derivation devices which are used to create additional channels under 6.5.1 and 6.5.2, following, may be connected to private line service subject to 6.1, 6.2 and 6.3, preceding. 6.5.1 Subject to the normal transmission characteristics of the private line service ordered, the customer, authorized user or joint user may create additional channels from the service ordered through the use of channel derivation equipment located at his/her premises. Channel derivation equipment can be used with any service. 6.5.2 Centel makes no representation as to: (1) the suitability of the channels it provides for such subdivision into additional channels by derivation equipment, or (2) the suitability of the resultant derived channels for any communications purpose. 6.6 Connections of Certain Facilities of Power, Pipe Line and Railroad Companies (1) Facilities of an electric power company, an oil, oil products or natural gas pipe line company, or a railroad company provided primarily to communicate with points located along a right-of-way (including premises or such company anywhere in cities, towns or villages along the right-of-way) owned or controlled by such company may, in lieu of the provisions of 6.3 and 6.4.4, preceding, be connected with services furnished by Centel at the point of interconnection to the same customer, subject to the following: 6.6.1 Such connections will be made by means of switching or connecting equipment furnished by the customer. 6.6.2 Such customer telephone facilities will be connected at the point of interconnection to private line services furnished by Centel for voice transmission and using a Series 300 or 400 channel when furnished to the same customer, for communications with stations associated with such services, provided, however, that facilities of the customer will not be connected to a local or toll central office line to form a through-connection except as follows: (A) in cases of emergency involving safety of life or property; (B) in cases of calls originated by railroad employees under circumstances indicating need for prompt action to secure or maintain the safety, continuity or reliability of railroad service to the public, and related to the movement of passengers, mail, property or equipment by railroad, or the repair, maintenance or construction of railroad rights-of-way, structures or equipment; (C) in cases where the customer facilities serve locations where it is impracticable because of hazard or inaccessibility for Centel to furnish its facilities; and (D) during an interim period in cases where the customer has arranged for replacement of said customer facilities with facilities of Centel.

(1) Obsolete - cannot add to an existing system, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 47 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.6 Connections of Certain Facilities of Power, Pipe Line and Railroad Companies (1) 6.6.3 Telephone circuits of such companies will be connected to a local or toll central office line to form a through-connection only through manual switching equipment, or an attendant's position of dial PBX equipment. Such equipment or position may be located at either or both ends of the customer's circuit. 6.6.4 Connection of a telephone circuit of such companies as specified in 6.6.2(A) through 6.6.2(D), preceding, may be established at either end of such circuit, but shall not be established at both ends simultaneously. 6.6.5 Customer teletypewriter or morse, telephotograph, data transmission, remote metering, supervisory control or miscellaneous signaling facilities will be connected at the point of interconnection to private line service furnished by Centel for such purposes to the same customer. 6.6.6 Centel-provided private line services, when connected at the point of interconnection with facilities of the customer, will not be used for communications of other than the customer, except that such services may be used for the communications of, and be connected with services furnished by Centel to other companies which: (A) Are operated with the customer as parts of an integrated electric power, oil, oil products or natural gas system or railroad system under direct or common ownership or control; or (B) Own or operate an electric power or pipe line or railroad system jointly with the customer; or (C) Own or operate electric power or pipe line or railroad facilities interconnected with those of the customer. Centel-provided private line services when so connected may be connected to a local or toll central office line to form a through-connection for communications of other companies specified in 6.6.6(A) through 6.6.6(C), preceding, including calls originated by employees of such companies only under the circumstances set forth in 6.6.1 and 6.6.2, preceding. 6.6.7 Customer-provided terminal equipment and communications systems connected to the private line services specified in 6.2.2, preceding, per 6.6.1 through 6.6.6, preceding, prior to January 1, 1980, may remain connected and be moved and reconnected for the life of the equipment without registration unless subsequently modified. New installations of customer-provided terminal equipment or communications systems subject to Part 68 of the FCC's Regulations connected to such private line services must meet the requirements of Part 68 of the FCC's Regulations.

(1) Obsolete - cannot add to an existing system, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 48 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.6 Connections of Certain Facilities of Power, Pipe Line and Railroad Companies (1) (Continued) 6.6.8 Effective May 1, 1983, new installations of, or additions to customer-provided terminal equipment and communications systems subject to Part 68 of the FCC's Regulations, connected to the private line services specified in 6.2.3 or 6.2.4, preceding, per 6.6.1 through 6.6.6, preceding, must meet the requirements of Part 68 of the FCC's Regulations. 6.7 Connections of Certain Facilities of the U.S. Army, Navy and Air Force (1) Facilities of the U.S. Department of the Army, Navy, or Air Force will be connected with services furnished by Centel, in lieu of the provision of 6.3 and 6.4.4, preceding, as provided in 6.7.1 and 6.7.2, following, where the Secretary of the appropriate Department or his authorized representative notifies Centel in writing that such connection is required for reasons of military necessity. 6.7.1 Telephone facilities of the aforesaid Departments will be connected to private line services furnished by Centel for voice, transmission and using a Series 300 or 400 channel for communications with stations associated with such services; provided, however, that such Department facilities will not be connected to a local or toll central office line to form a through- connection except in cases of emergency involving safety of life or property, unless such facilities are provided in locations where it is impracticable for Centel to furnish its services. 6.7.2 Teletypewriter or morse, telephotograph, data transmission, remote metering, supervisory control or miscellaneous signaling facilities of the aforesaid Departments will be connected to private line services furnished for such purposes. 6.7.3 Customer-provided terminal equipment and communications systems connected to the private line services specified in 6.2.2, preceding, per 6.7.1 and 6.7.2, preceding, prior to January 1, 1980, may remain connected and be moved and reconnected for the life of the equipment without registration unless subsequently modified. New installations of customer-provided terminal equipment or communications systems subject to Part 68 of the FCC's Regulations connected to such private line services must meet the requirements of Part 68 of the FCC's Regulations. 6.7.4 Effective May 1, 1983, new installations of, or additions to customer-provided terminal equipment and communications systems subject to Part 68 of the FCC's Regulations connected to the private line services specified in 6.2.3 and 6.2.4, preceding, per 6.7.1 and 6.7.2, preceding, must meet the requirements of Part 68 of the FCC's Regulations.

(1) Obsolete - cannot add to an existing system, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 49 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.8 Connections of Services Furnished by Centel with Service of Other Common Carriers The connection of services furnished by Centel with services of other carriers shall be under the regulations found in the Access Service Tariff and other sections of this tariff. 6.9 Connections of Services Furnished by Centel to the Same Customer 6.9.1 A private line service furnished by Centel may be connected to another private line furnished by Centel, or by Centel and its other participating carriers, or to another service provided by Centel as specified in 6.9.2 through 6.9.8, following. 6.9.2 A private line service may be connected to another private line if the forms of electrical communication for which they are being used are the same. These private lines may be connected (1) at the premises of the customer, or (2) at the premises of an authorized user with a common service point on both private lines. All connections will be made through connecting arrangements furnished in connection with channel switching arrangements provided by Centel or through switching equipment provided by the customer or authorized user, except as otherwise provided in 6.9.3, following. 6.9.3 Private line services provided for wired music distribution (Series 600) may be connected to the extent specified in Section 2 of this tariff. 6.9.4 Channels created by the customer, authorized user or joint user under the provisions of 6.5, preceding, may be connected at the customer's, authorized user's or joint user's premises: (A) To channels of voice grade or less furnished by Centel, and channels created therefrom as authorized in 6.5. The connection of channels specified above is subject to the regulations contained in 6.1, 6.2 and 6.3, preceding. (B) To entrance facilities furnished by Centel and to channels created therefrom as authorized in 6.5. The connection of channels specified above is subject to the regulations contained in 6.1, 6.2 and 6.3, preceding.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba CenturyLink Section 1 (T) 1st Revised Sheet 50 Cancels Original Sheet 50 REGULATIONS

6. Connections of Terminal Equipment and Communications Systems (Continued)

6.9 Connections of Services Furnished by Centel to the Same Customer (Continued)

6.9.5 A voice frequency private line service for voice communication, or other types of voice grade channels when used alternately for voice transmission and when in the voice mode, may be connected at a PBX or other switching or connecting arrangement to LDMTS or local exchange (T) service to form a through-connection over the private and exchange lines where facility conditions (D) permit. It is not contemplated that not more than one such type of connection will be established simultaneously and transmission is not represented as adapted to such connections.

When a two-point private line service (or a multipoint private line service arranged for service solely between two points) using the above type channels is used for transmission of data, through-connections over the private and exchange lines may also be established as described above.

6.9.6 The telecommunications network may be used in conjunction with channels for medium speed facsimile transmission to extend the transmission and reception of pictures and similar material for publication subject to the rates and regulations specified in the General Customer Services Tariff. No direct connection of the telecommunications network shall be made to the above type channels at the premises of the customer except where protective connection equipment is provided for this purpose by Centel.

6.9.7 Entrance facility channels may be connected to private line service (including other entrance facility channels) either on the premises of the customer or authorized user or through Centrex control switching equipment which serves the premises of the customer or authorized user provided that:

(A) At such premises the customer has a regular and continuing requirement for the origination or termination of communications over the customer-provided communications system which is extended by the entrance facility channel.

(B) The normal mode of operation of the customer-provided communications system shall be to provide communications originating or terminating at the premises where the connection is made or at the customer's or authorized user's premises served by the Centrex control switching equipment.

(C) Where the connection is made on the premises of the customer or authorized user, the connection shall be made through switching equipment provided either by the customer or authorized user.

(D) The connection shall be to channels of voice grade or less furnished by Centel or to channels created there from under the provisions of 6.5, preceding.

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba CenturyLink Section 1 1st Revised Sheet 51 Cancels Original Sheet 51 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.9 Connections of Services Furnished by Centel to the Same Customer (Continued) 6.9.8 Entrance facility channels may be connected to LDMTS or local exchange service either on the (T)(D) premises of the customer or authorized user or through Centrex control switching equipment which serves the premises of the customer or authorized user provided that: (A) At such premises the customer-provided communications system which is extended by the entrance facility channel, or the LDMTS or local exchange service is used for the (T)(D) origination or termination of communications. (B) Where the connection is made on the premises of the customer or authorized user, the connection shall be made through switching equipment provided either by the customer or authorized user. 6.9.9 Channels of less than voice grade may be connected at the customer's premises to telecommunications service through switching equipment provided by the customer. The connection shall be through a data set or a data access arrangement and shall be such that the function of network control signaling is performed by equipment furnished, installed and maintained by Centel. 6.10 Connections of Services Furnished by Centel to Different Customers 6.10.1 A private line service furnished to a customer may be connected: (A) With a private line service furnished to a branch or agency of the Centel States Government for the purposes specified under 6.10.1(D) and 6.10.1(E), below, provided such connection is authorized by the branch or agency to whose service the connection is made. (B) With a private line service or telecommunications service furnished to a different customer, provided such connection is made at the premises of an authorized user or joint user as specified in 6.10.1(F) through 6.10.1(I), following, or (C) As specified under 6.10.1(J) through 6.10.1(L), following, when connections involve (1) channels for wired music distribution, (2) channels of voice grade or less when these are furnished for data transmission to one customer with connection to channels created by another customer, or (3) private lines furnished to the U.S. Army, which may be connected to Associated Press and Centel Press International private lines for teletypewriter transmission, used in establishing an Emergency Action Notification System. (D) Connections as specified in 6.10.1(A) through 6.10.1(C), preceding, will be provided only when the same types of channels (except LDMTS or local exchange service lines as set (T)(D) forth in 6.10.1(G) and 6.10.1(I), following, are involved) are connected and the same forms of electrical communication are used over the connected channels.

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 52 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.10 Connections of Services Furnished by Centel to Different Customers (Continued) 6.10.1 A private line service furnished to a customer may be connected: (Continued) (E) Where the private line service is furnished to the Government for teletypewriter transmission for the collection and dissemination of (a) weather information, (b) miscellaneous airways information pertaining to the supervision of the flight of aircraft along the civil airways, or (c) agricultural and farm market information, connection may be made as follows: (1) Receiving only service - for reception of weather and miscellaneous airways information and agricultural and farm market information transmitted over the government service to which it is connected. (2) Sending and receiving service - for transmission of flight plans to and acknowledgment of such plans from the government service to which connection is authorized. (F) Where the private line utilizes a voice grade data channel and is furnished to the government for data transmission for the collection and dissemination of weather information and for the collection and dissemination of data relating to national defense, connection may be made for such purposes. (G) A private line service furnished to a customer may be connected to a private line service furnished to a different customer and both private lines may be used by a joint user provided that: (1) The connection is made at the premises of a party who is a joint user on both of the private lines. (2) Such connections will be through switching equipment provided by the joint user. (3) When the private line services are so connected, all communications over the interconnected facilities shall be to or from the joint user and relate directly to his business. (4) Such private lines shall include channels created by the customer per 6.5.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 53 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.10 Connections of Services Furnished by Centel to Different Customers (Continued) 6.10.1 A private line service furnished to a customer may be connected: (Continued) (H) A joint user of a private line may connect to telecommunications service or private line service provided to him as a customer to that private line service on which he is a joint user provided that: (1) The connection is made at the premises of the joint user. (2) Such connection will be made through switching equipment provided by the joint user. (3) When the connection involves telecommunications service, the connection shall be such that the functions of network control signaling are performed by equipment furnished, installed and maintained by Centel. (4) When the private line service is connected with telecommunications service, all communications over the interconnected facilities shall be to or from the joint user and relate directly to his business. (5) Such private lines shall include channels created by the customer per 6.5. (I) A private line furnished to a customer may be connected to a "different" customer's private line if the "different" customer is an authorized user on the other customer's private line and provided that: (1) All communications over the interconnected private lines are between the customers and relate directly to their business. (2) Such connections be made through switching equipment provided by the customer or authorized user. (3) Neither of the private lines are being furnished for foreign exchange service. (4) Such private lines shall include channels created by the customer per 6.5.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 54 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.10 Connections of Services Furnished by Centel to Different Customers (Continued) 6.10.1 A private line service furnished to a customer may be connected: (Continued) (J) A private line furnished to a customer may be connected to LDMTS or local exchange service furnished to a different customer provided that: (1) The customer for the LDMTS or local exchange service is an authorized user of the other customer's private line. (2) The connection shall be made through switching equipment provided by the customer or the authorized user. (3) The connection shall be such that the functions of network control signaling are performed by equipment furnished, installed and maintained by Centel. (4) Such private lines shall include channels created by the customer per 6.5. (K) Series 600 channels may be connected to the extent specified in the following paragraph and as in Section 2, 2.5. Series 600 channels may be used only by the customer except that emergency and defense warning announcements may be made by authorized civil defense offices via Series 600 local channels, interoffice channels, interexchange channels and channel terminals between the civil defense office and the customer's studio. (L) Channels of voice grade or less furnished by Centel to one customer may be connected to channels created by another customer from a channel per 6.5, preceding, provided that the customer whose channel is to be so connected is a joint user of the individual channel from which the channels have been created by the other customer. (M) Private lines used for teletypewriter transmission furnished to the U.S. Army may by connected to private lines used for teletypewriter transmission to the Associated Press and Centel Press International for the purpose of establishing an Emergency Action Notification System provided that said customers agree to such connection.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 55 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.11 U.S. Government Executive Departments and Agencies (1) 6.11.1 Equipment of a department or agency of the executive branch of the U.S. Government used for the purpose of disguising or concealing the contents or meaning of communications may be connected to Centel services, subject to the regulations and conditions stated below: 6.11.2 The head of the department or agency whose equipment is to be connected, or his authorized representative, shall notify Centel in writing that such connection is necessary to safeguard official information which requires protection in the interests of national defense, or other confidential official information disclosure of which to unauthorized persons would be detrimental to the public interest. 6.11.3 The government equipment shall be so constructed, maintained and operated as to work satisfactorily with the facilities of Centel. 6.12 Entrance Facilities (1) 6.12.1 Entrance facility channels are furnished to the customer by Centel for the purpose of extending customer-provided communications systems to a service point of the customer or authorized user or to Centrex control switching equipment serving the premises of the customer or authorized user for use at such premises. These channels are furnished for half-duplex or duplex operation on a two-point basis. The approximate bandwidth is 300-3000 Hz. 6.12.2 Regulations Customer-provided communications systems may be connected through connecting arrangements furnished by Centel with entrance facilities furnished to the same customer for the purpose of extending the customer-provided communications system to a service point of the customer or authorized user. The channels created therefrom per 6.5, preceding, may be connected at such customer's or authorized user's service point to other customer-provided communications systems per 6.4.4(A)(1), 6.4.4(A)(2) and 6.4.4(A)(4), preceding. Entrance facilities are furnished (a) within an exchange, or (b) located 25 airline miles or less from the point at which the customer-provided communications channel is connected to the Centel entrance facility. Requests for entrance facilities outside an exchange or over 25 airline miles will be reviewed on a case-by-case basis.

(1) Obsolete - cannot add to an existing system, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 56 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.12 Entrance Facilities (1) (Continued) 6.12.3 Connection of Customer-Provided Terminal Equipment or Communications Systems to Centel Entrance Facilities. (A) Customer-provided communications channels may be connected with entrance facilities furnished by Centel for the purpose of extending the customer-provided communications channels. The connection shall be through connecting arrangements furnished, installed and maintained by Centel. (B) Entrance facilities may be connected to customer-provided transmitting and receiving terminal equipment or to customer-provided communications systems for the purpose of communicating with transmitting and receiving terminal equipment located on the premises on which the service point is located. The connection shall be through connecting arrangements furnished, installed and maintained by Centel. 6.12.4 Minimum Protection Criteria Customer-provided channels, communications systems or terminal equipment must comply with the minimum protection criteria set forth in 6.4.6, preceding. 6.12.5 Rates and Charges - Monthly Service Special charges are applied for entrance facilities on a case-by-case basis.

(1) Obsolete - cannot add to an existing system, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 57 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.13 Connections of Customer-Provided Test Equipment (1) 6.13.1 Totally Protective Connections (A) Customer-provided test equipment may be connected to those private line services specified in 6.2, preceding, at the premises of the customer through registered or grandfathered terminal equipment, protective circuitry, or communications systems subject to Part 68 of the FCC's Regulations which, either singularly or in combination, assures that all of the requirements of Part 68 of the FCC's Regulations (total protection) are met at the point of interconnection. (B) Customer-provided test equipment may be connected to those private line services specified in 6.4.1(B), preceding, at the premises of the customer either (a) directly at the point of interconnection, or (b) through other equipment, provided that the minimum protection criteria specified in 6.4.6, preceding, are continually met at the point of interconnection. 6.13.2 Interim Program Connections of Customer-Provided Test Equipment Customer-provided test equipment may also be connected at the premises of the customer to those private line services specified in 6.2.7, preceding, either (a) directly at the point of interconnection, or (b) through terminal equipment, protective circuitry, or communications systems subject to Part 68 of the FCC's Regulations which does not provide protection for signal power control under the following Interim Program provided that: (A) The customer-provided test equipment is limited to transmission signal power generating and/or detection devices, or similar devices, used by the customer for the detection and/or isolation of a communications service fault. (B) The customer-provided test equipment is of a type that was lawfully directly connected to private line service as of March 6, 1981. Such test equipment may remain connected, be moved or reconnected during the life of the test equipment unless it has been subsequently modified. (C) Direct connection of customer-provided test equipment or connections through Centel- provided terminal equipment, or communications systems subject to Part 68 of the FCC's Regulations are made through Centel-provided jacks or as otherwise authorized by Centel.

(1) The Interim Program for the Connection of Customer-Provided Test Equipment, unless sooner canceled or changed, will remain in effect until a permanent program is adopted by the FCC as a result of Part 68 Rulemaking in CC Docket No. 81-216, 85 F.C.C.2d 868 (1981).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 58 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.13 Connections of Customer-Provided Test Equipment (1) (Continued) 6.13.2 Interim Program Connections of Customer-Provided Test Equipment (Continued) (D) Customer-provided test equipment must be operated per the institutional procedures for signal power control as specified in 6.13.3, following. (E) The customer notifies Centel of each private line service at each premises to which the customer-provided test equipment will be connected in advance of the initial connection. The customer must also notify Centel when such test equipment is permanently disconnected at each premises. (F) No customer-provided test equipment or combination of test equipment with terminal equipment, protective circuitry or communications systems subject to Part 68 of the FCC's Regulations (including but not limited to wiring) may cause electrical hazards to Centel personnel, damage to Centel equipment, malfunction of Centel billing equipment, or degradation of service to persons other than the user of the subject test equipment or the user's calling or called party.

(1) The Interim Program for the Connection of Customer-Provided Test Equipment, unless sooner canceled or changed, will remain in effect until a permanent program is adopted by the FCC as a result of Part 68 Rulemaking in CC Docket No. 81-216,85 F.C.C.2d 868 (1981).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 59 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.13 Connections of Customer-Provided Test Equipment (1) (Continued) 6.13.3 Institutional Procedures for Signal Power Control (A) Under 6.13.2(D), preceding, the customer must comply with the following institutional procedures: (1) The customer must install, operate and maintain the test equipment so that its signal power at the point of interconnection complies with Subpart D of Part 68 of the FCC's Regulations. (2) The operator/maintainer responsible for the test equipment signal power present at the point of interconnection must be trained to perform these functions by successfully completing one of the following: (a) a training course provided by the manufacturer of the test equipment, or (b) a training course provided by the customer, or authorized representative of the customer, using training materials and instructions provided by the manufacturer of the test equipment, or (c) an independent training course (e.g., trade school or technical institution) recognized by the manufacturer of the test equipment, or (d) in lieu of the preceding training requirements, the operator/maintainer is under the control of a supervisor trained per 6.13.3 (A) (2) (a) through 6.13.3(A) (2) (c), preceding. Upon request, the customer is required to provide proper documentation to demonstrate compliance with the requirements in this 6.13.3(A) (2). (3) Advance notice must be given to Centel in the form of a notarized affidavit before the initial connection of the customer-provided test equipment at each premises after April 9, 1981. A copy of the affidavit must also be maintained at the customer's premises. The affidavit must contain the following information: (a) The full name, business address, business telephone number and signature of the customer or authorized representative who has responsibility for the operation of the test equipment.

(1) The Interim Program for the Connection of Customer-Provided Test Equipment, unless sooner canceled or changed, will remain in effect until a permanent program is adopted by the FCC, as a result of Part 68 Rulemaking in CC Docket No. 81-216, 85 F.C.C. 2d 868 (1981).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 60 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.13 Connections of Customer-Provided Test Equipment (1) (Continued) 6.13.3 Institutional Procedures for Signal Power Control (Continued) (A) (Continued) (3) (Continued) (b) The lines to which the test equipment will be either connected to or arranged for connection to. (c) A statement that all operations associated with the establishment, maintenance and adjustment of the test equipment signal power present at the point of interconnection will comply with Subpart D of Part 68 of the FCC's Regulations. (d) A statement describing how each operator of the test equipment will meet and continue to meet the training requirements for persons installing, connecting, adjusting or maintaining the test equipment. (B) Extraordinary Procedures (1) Centel may invoke extraordinary procedures to protect the telecommunications network where one or more of the following conditions are present: (a) Information provided in the affidavit gives reason to believe that a violation of Part 68 of the FCC's Regulations or the institutional procedures set forth in 6.13.3(A), preceding, is likely. (b) Harm has occurred and there is reason to believe this harm was a result of operations performed under the institutional procedures set forth in 6.13.3(A), preceding. (2) The extraordinary procedures, which can be invoked by Centel include: (a) Requiring the use of protective apparatus which either protects solely against excessive signal power or which assures that all of the requirements of Part 68 of the FCC's Regulations are met at the point of interconnection. (b) Disconnecting service.

(1) The Interim Program for the Connection of Customer-Provided Test Equipment, unless sooner canceled or changed, will remain in effect until a permanent program is adopted by the FCC Commission as a result of Part 68 Rulemaking in CC Docket No. 81-216, 85 F.C.C. 2d 868 (1981).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 61 REGULATIONS 6. Connections of Terminal Equipment and Communications Systems (Continued) 6.13 Connections of Customer-Provided Test Equipment (1) (Continued) 6.13.3 Institutional Procedures for Signal Power Control (Continued) (B) (Continued) (3) A charge equal to the Maintenance of Service Charge will apply when: (a) It is necessary to send a repair person to the premises where the test equipment is connected because a condition as set forth in 6.13.3(B)(1), preceding, exists, and (b) A failure to comply with the institutional procedures for signal power control is disclosed.

7. Method of Applying Rates 7.1 The method of applying rates for Series 600 private line services are determined as set forth in 2.5. The paragraphs where certain other services are set forth are as follows: extension services, 2.6; special bridging service, 2.7; local area data service, 2.8; DATAPHONE Select-A-Station service, 2.9; and served direct service, 2.10. 7.2 The method of applying rates for interexchange private line service involving two-point and multipoint services for Series 100, Series 200, Series 300, Series 400 are determined as follows. 7.2.1 Local Channel (A) Two-point A local channel charge shall apply for the first channel termination, per service, involved on a customer, authorized or joint user premises. Charges are based on the airline distance in quarter miles, or fraction thereof, between each customer authorized or joint user premises and the serving office. The following have only one local channel: 314B, 314C, 315, 316, 317A, 317B, 342 and 343. When terminated in a Network Reconfiguration Service the following may have only one local channel: 420, 422, 423, 424 425 and 435. (B) Multipoint In addition to applicable private line service charges, a bridging charge per channel bridged, applies when three or more voice grade channels connect at the same location. Bridging charges do not apply to foreign exchange, foreign serving office and Types 315, 316, 317A, 317B, 342 and 343.

(1) The Interim Program for the Connection of Customer-Provided Test Equipment, unless sooner canceled or changed, will remain in effect until a permanent program is adopted by the FCC as a result of Part 68 Rulemaking in CC Docket No. 81-216,85 F.C.C.2d 868 (1981).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 62 REGULATIONS 7. Method of Applying Rates (Continued) 7.2.1 Local Channel (Continued) (C) Determination of Local Channel Mileage (1) A local channel includes a loop and such other equipment as required to provide a private line channel from a customer's premises to the serving central office for that premises. (2) Centel may use city maps of the appropriate scale or other means to measure private line local channels. The maps may be paper or digitized, but need not include detail of building locations or customer campus arrangements. (3) Centel will measure the private line local channel distance between the customer's requested service address and the serving central office for that address (the location of the customer's street address on a map may be estimated). Mileages are measured in units of quarter miles or tenths of a mile. For billing purposes fractional units are rounded to the next higher unit. (4) The customer may provide documented mileage measurements that show the placement of the customer's building on a premises. The airline mileage measurement to the building where the requested private line service is to be terminated may be different from the measurement obtained by Centel using its standard maps. Centel may accept the customer's mileage upon validation by Centel. (a) Acceptable validation will be an official scale map of the customer's premises showing the building location on the property in addition to a measurement verification from a standard scale city map of the airline distance between the property location and the serving central office. If this information is sufficient and not in dispute, no additional validation will be necessary.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 63 REGULATIONS 7. Method of Applying Rates (Continued) 7.2.1 Local Channel (Continued) (C) Determination of Local Channel Mileage (Continued) (4) (Continued) (b) If a dispute exists, or if acceptable documentation of the location on the customer's premises of the served building in question is not available, then other official validation will be necessary. For example, a document signed by a registered professional surveyor, professional engineer, professional cartographer, etc. verifying the airline mileage will be acceptable. (c) Attestation of mileage measurements by a non-professional such as a customer or a consultant is not acceptable validation. (d) Centel reserves the right to verify mileage validation documentation submitted pursuant to (a) and (b) above. (5) Billing adjustments to existing customers may result from mileage validations pursuant to (4) above. (a) Such adjustments (if any) will be made prospectively from the date of notification by the customer (or the customer's agent) to Centel that the private line local channel mileage charge to the served building is in error and should be adjusted. (b) If the customer presents adequate documentation based on Centel and/or customer-provided data, that the served building and service to the served building existed prior to the date of notification by the customer to Centel, then Centel shall adjust the billing in arrears to the installation date of the service. (c) Centel reserves the right to verify billing adjustment documentation submitted pursuant to (b) above.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 64 REGULATIONS 7. Method of Applying Rates (Continued) 7.2 (Continued) 7.2.2 Interoffice Channel (A) Two-Point Interexchange intraLATA - When a point of interconnection of an interexchange intraLATA private line service is located in an area served by a serving office that is not also the primary serving office, interoffice mileage charges apply. Charges are based on the V & H distance between the primary serving office and the serving office. (B) Multipoint Each channel connecting primary serving offices with serving offices, or serving offices with serving offices is considered a separate channel for which mileage is independently computed. When the customer requests all or some of the offices connected in a specific sequence, the channel charges will be determined in that sequence. Otherwise, mileage will be charged for in a manner that results in the lowest possible total interoffice channel charges. Bridging charges per channel bridged apply when the three or more voice grade channels connect at the same location. Bridging charges do not apply to foreign exchange, foreign serving office, and Types 315, 317A, 317B, 342 and 343. 7.2.3 Channel Terminals Channel terminals charges apply at (1) each termination of an interexchange intraLATA channel, and (2) each termination of an interoffice channel. 7.2.4 Interexchange Intralata Channel (A) Two-point When the points of interconnection of a private line service are located in different exchanges or metropolitan exchanges, interexchange intraLATA mileage charges apply. Each exchange and each zone of a metropolitan exchange has one primary serving office. Charges are based on the V & H distance between primary serving offices. Where "other line" charges apply, mileage is calculated between a Southwestern Bell primary serving office and a point of connection with the facilities of another LEC. This interexchange mileage shall not exceed the distance between the primary serving offices.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 65 REGULATIONS 7. Method of Applying Rates (Continued) 7.2 (Continued) 7.2.4 Interexchange Intralata Channel (Continued) (B) Multipoint Each channel connecting primary serving offices is considered a separate channel for which mileage is independently computed. When the customer requests all or some of the primary serving offices to be connected in a specific sequence, the interexchange channel charges will be determined in that sequence. Otherwise, mileage will be charged in a manner that results in the lowest possible total interexchange channel charges. Bridging charges per channel bridged, apply when three or more voice grade channels, connect at the same location. Bridging charges do not apply to foreign exchange, and Types 315, 316, 317A, 317B, 342, 343 and Series 600. 7.2.5 Additional Point of Termination of a Local Channel in Different Buildings (Same Premises) (A) A charge, as provided in Section 2, following, for extending a local channel and terminating the channel at a point of interconnection in a different building on the same premises shall apply in lieu of additional local channel charges. {1} (B) When all points of interconnection of a single private line service are located in different buildings on the same premises, the charge for the channel between each pair of buildings shall be the same as the charge for extending a local channel to a point of interconnection in different buildings on the same premises as specified in 7.2.5(A). {1} 7.2.6 Additional Point of Termination in Same Building A charge as provided in Section 2, following, for extending a local channel and terminating the channel at a point of interconnection in the same building, shall apply in lieu of additional local channel charges. {1} 7.2.7 Category "A" Primary Serving Offices Those offices to which Schedule 1 and 2 interexchange channel rates apply for Series 300 and 400 channels. Abilene - Orchard Houston - Capitol Amarillo - Drake Laredo Austin - Greenwood Longview - Main Beaumont - Beaumont 835 Lubbock - Porter/Sherwood Corpus Christi - Tulip Midland - Mutual Dallas - Taylor San Angelo - 653 El Paso - 542 San Antonio - Capitol Fort Worth - Edison Sweetwater Freeport Waco - Plaza Harlingen

{1} Obsolete - See section 2 of this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 66 REGULATIONS 7. Method of Applying Rates (Continued) 7.2 (Continued) 7.2.8 Category "A" Primary Serving Offices - U. S. Government Those offices in addition to 7.2.7, preceding, to which Schedule 1 and 2 interexchange channel rates apply for Series 300 and 400 channels for service furnished only to a branch or agency of the Centel States Government. Apollo Seguin Ennis 7.2.9 Service Charges A charge applies per point of termination installed or moved as provided in Section 2, following. Those services with one local channel shall be billed as provided in Section 2, following. Private line service charges for local channel Type 315 does not apply for inside moves within the same building on the same premises. 7.2.10 Bridging charges per channel bridged apply when three or more voice grade channels connect at the same location. Bridging charges do not apply to foreign exchange, foreign serving office and Types 315, 317A, 317B, 342, 343 and Series 600. 7.2.11 Signaling Signaling charges for Series 400 channels are applicable per point of termination, except for Type 428 which is applicable per local channel. Rates and charges are found in Section 2 of this tariff. Local channel Types 428 require Type A, B or C loop signaling, except for the following: Signaling charges do not apply to different buildings, same premises PBX (or similar) stations. Loop signaling is optional on Type 428 local channels associated with a grandfathered customer- provided PBX (or similar) switching system. Local channel Types 424 require E&M signaling. E&M signaling is optional on Type 424 local channels terminating in a grandfathered customer- provided PBX (or similar) switching system. 7.2.12 Special Routing The private line services furnished under this tariff are provided over such routes as Centel may elect. Special routing is involved where, to comply with requirements specified by the customer, Centel furnished the private line service via serving offices and/or primary serving offices other than those through which the service would normally be routed. Each channel connecting serving offices and/or primary serving offices is considered a separate channel for which charges are independently computed. Special routing will be provided only where suitable facilities are available.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 67 REGULATIONS 7. Method of Applying Rates (Continued) 7.2 (Continued) 7.2.13 Determination of Mileage (A) For the purpose of determining airline mileages, vertical and horizontal grid lines have been established across the Centel States and Canada. The spacing between adjacent vertical grid lines and between horizontal grid lines represents a distance of one coordinate unit. This unit is the square root of 0.1, expressed in statute miles. A vertical (V) and a horizontal (H) coordinate is computed for each primary serving office and serving office from its latitude and longitude location by use of appropriate map-projection equations. A pair of V-H coordinates locates a primary serving office or serving office for determining airline mileages, at a particular intersection of an established vertical grid line with an established horizontal grid line. The distance between any two primary serving offices or serving offices is the airline mileage computed as explained in (B), following. (B) To determine the rate distance between any two primary serving offices or serving offices, proceed as follows: (1) Obtain the "V" and "H" coordinates for each primary serving office or serving office. (2) Obtain the difference between the "V" coordinates of the two primary serving offices or serving offices. Obtain the difference between the "H" coordinates. Note: The difference is always obtained by subtracting the smaller coordinate from the larger coordinate. (3) Square each difference obtained in (2), above. (4) Add the squares of the "V" difference and the "H" difference obtained in (3), above. (5) Divide the sum of the squares obtained in (4), above, by 10.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 68 REGULATIONS 7. Method of Applying Rates (Continued) 7.2 (Continued) 7.2.13 Determination of Mileage (B) (Continued) (6) Obtain the square root of the result obtained in (5), preceding. This is the rate distance in miles. (Fractional miles are rounded to the next higher quarter mile.) The rate for each quarter mile is 25% of the rate per mile rounded to the nearest cent. Example: The rate distance is required between the Dallas Zone of the Dallas Metropolitan Exchange and the Fort Worth Zone of the Fort Worth Metropolitan Exchange V H Killeen Serving Office 8833 4062 Humble Serving Office 8881 3539 difference 48 523 squared 2,304 + 273,529 = 275,833 ______|275,833 \| 10 = 166.08 = 665 quarter miles

8. Exceptions In those cases where an intraexchange service has stations in Texas and another state, the method of applying rates in 7.1 and 7.2 is modified to apply the charges for that portion of the private line service located in the other state pursuant to that state's tariff.

9. Joint User Service 9.1 Regulations 9.1.1 Interexchange intraLATA private line services may be arranged for joint use by the customer. A private line arranged for joint use shall be for the transmission of communications relating directly to the joint user's business, between stations of the joint user. 9.1.2 Private line service will be arranged for joint use upon written application by the customer to Centel. All requests for changes in service or equipment shall be initiated by the customer. 9.1.3 The customer is responsible for payment of all charges incurred; whether such charges are associated with the service and equipment used by the customer or joint user. 9.1.4 The customer is responsible for compliance with tariff regulations by each joint user.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 69 REGULATIONS 9. Joint User Service (Continued) 9.1 Regulations (Continued) 9.1.5 Centel is not responsible for procuring joint users. 9.1.6 The customer may allocate charges to the joint user provided such charges do not, in total, exceed Centel's charge to the customer. 9.1.7 A joint user of a customer's service may at anytime obtain service directly from Centel. 9.1.8 A joint user must have a station on the private line on two or more of his premises. 9.1.9 A joint user can use additional channels created by the customer per this tariff, provided the joint user has a station on a channel from his premises to the point of connection with the derived channel. 9.1.10 Joint user arrangements are not offered for foreign exchange, Series 600 and 1000 private line services. 9.1.11 When a private line service is arranged for joint use, the customer will be billed the joint use charge and all charges provided in this tariff for the jointly used service, including facilities and equipment required to furnish the joint user access to the service. Charges for joint user service are found in Section 2, 2.13.

10. Special Charges, Fees and Taxes There shall be added to the customer's bill for service, an additional charge equal to the pro rata share of any occupation, franchise, business, license, excise, privilege or other similar charge or tax, now or hereafter, imposed upon the gross receipts or revenue of Centel by a municipal taxing body or municipal authority whether by statute, ordinance, law or otherwise, and whether presently due or to hereafter become due. The charge applicable to each customer will appear separately on the customer's regular monthly bill and shall be determined on a basis equal to the tax levied by each municipal taxing body or municipal authority. The amount of charge to the customer shall be computed by dividing the tax expressed as a percentage by 100% minus the tax expressed as a percentage and multiplying the decimal thus obtained by the customer's service charges to which such tax applies as reflected by the following formula:

Tax % x Service Charges Subject to Tax = Amount of Charge to 100% - Tax % Customer The amount of charge to the customer will be rounded to the nearest cent.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 70 REGULATIONS 11. Surcharge 11.1 General A surcharge applies to each interexchange private line service as follows: Monthly Rate USOC Surcharge ...... $ 25.00 S25 - Two-Point Service - One charge is applicable. - Multipoint Service - One charge is applicable for each local channel in excess of one. This surcharge compensates Centel for use of the local exchange network when private line service is connected to a PBX or equivalent device which is capable of interconnecting the private line services with local exchange service ("leaky PBX"). Centel will automatically bill the appropriate surcharge on each private line service installed irrespective of whether the interconnection capability exists in the customer's premises equipment or in a Centrex-CO type switch unless the service is exempt from the surcharge as set forth in 11.2, following. 11.2 Exceptions to the Surcharge Application 11.2.1 All Series 100, 200, 600 and local area data service private line channels. 11.2.2 The surcharge is not applicable to intraexchange private line services, nor to private line services that are terminated between exchanges that have mandatory Extended Area Calling Service arrangements as that service is defined in Section 3 in the General Customer Services Tariff. 11.2.3 In addition, there are two means by which the customer may be exempted from the monthly surcharge. First, if the customer certifies that the private line service is terminated in a device not capable of interconnecting the service with local exchange service, no surcharge will apply. Second, if the customer certifies that the private line service is associated with a switched access service in the same LATA that is subject to Carrier Common Line Charges, no surcharge will apply. Monthly Rate USOC Surcharge Exemption ...... $ 0.00 S25EX

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 1 Original Sheet 71 REGULATIONS 11. Surcharge (Continued) 11.3 Certification The certification will be in the form of a written notification to Centel. The notification may be provided (1) at the time the service is ordered, or (2) at such time as the service is reterminated to a device not capable of interconnecting to the local exchange network, or (3) at such time as the private line service becomes associated with a switched access service that is subject to Carrier Common Line Charges. If a written certification is not received at the time an order for service is placed, the surcharge will be applied. Exempt status will become effective on the date certification is received by Centel. 11.4 Crediting the Surcharge Centel will cease billing the surcharge when certification that the service has become exempt from the surcharge as set forth in 11.3, preceding, is received. If the status of the service was changed prior to receipt of the exemption certification, Centel will credit the customer's account an amount up to and limited to 90 days (3 months) billing based on the effective date of the change specified by the customer in the letter of certification. 11.5 Definitions 11.5.1 private branch exchange (PBX) - A private switching system, either manual or dial, usually serving an organization such as a business company or a government agency and usually located on the customer's premises. 11.5.2 "leaky PBX" - A PBX or equivalent device which is capable of interconnecting the private line services with local exchange service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 1 SERVICES AND RATES 1. General 1.1 In addition to the regulations set forth in the Regulations section of this tariff applicable to private line services, additional regulations are set forth throughout this section. 1.2 Channels are classified by series, and further classified within each series by types. The various series and types are described in terms of circuit characteristic and/or use. 1.3 The customer is responsible for the selection of the service, i.e., type of circuit, signaling options, jacks and terminating interfaces required to meet his or her needs. The customer-provided terminal equipment and station apparatus must be compatible with the service provided by Centel. Centel has overall responsibility for the private line service (up to the point of interconnection on the customer premises) including the selection of all local channels. 1.4 Exchange rates and regulations apply for the exchange portion of the total service when private line services are used in connection with exchange services, or are connected to exchange services or equipment. 1.5 When the number of private line services on a premises is such that cable facilities are required, such cable facilities may be provided specially for the customer's use and not as a part of Centel's general distributing plant, at charges based upon cost in lieu of tariff charges, where to do so will result in lower charges to the customer. (1)When it is feasible to connect buildings by the use of channels obtained from a cable for which carrying charges are paid to Centel, a channel termination charge will apply, as shown below. The channel termination provides for termination at the point of interconnection and does not provide for inside wiring beyond this point of interconnection. Class Monthly Service of Rate Charge USOC Service Each channel termination $2.35 $87.30 29G RMC1L 1.6 The point of interconnection for the connection of premises services comprises a standard registration jack or its equivalent and is provided as part of the private line service.

(1) Obsolete - Applicable to existing installations for existing customers at existing locations. (Cannot add to, cannot outside move, cannot supersede.)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 2 SERVICES AND RATES 2. Description of Services 2.1 Special Signaling Services - Series 100 2.1.1 These channels are suitable for use with two-point or multipoint service subject to the number of point limitations indicated for each type and are provided solely for use with customer-provided power and signaling equipment and other special signaling services. Those local channels used to provide a transmission path to connect with customer-provided station equipment (CPE) at a premises are defined in terms of electrical interfaces. Interconnection protection criteria and regulations as described in Section 1, Paragraph 6 of this tariff shall apply. 2.1.2 Special signaling services are available as follows: (A) The types of local channels offered for termination at a premises for termination in customer-provided terminal equipment and systems are as follows: (1) Type 101 - transmission characteristics in 2.1.2(A), following. (2) Type 102 - transmission characteristics in 2.1.2(B), following. Type 101 service is furnished on an intraexchange two or three-point basis only. Type 102 service is furnished on an intraexchange or interexchange two-point or multipoint (maximum of 26 points) basis. Service is restricted to no more than three serving offices, including the serving office of the central office station. Type 101 service has a two-wire interface with two-wire facilities for use with direct current transmission (metallic continuity). Customers may order two, two-wire services to achieve four-wire service. Transmission specifications and limitations are described in the Bell System Technical Reference on the transmission specification for private line metallic circuits which includes the following: Current applied by CPE - AC and DC components per conductor, not to exceed .150 amperes rms. Magnitude of the peak of the voltage between any conductor and ground - not to exceed 70.7 volts except continuous DC voltage not to exceed 135 volts. (B) Type 102 service has a two-wire interface with two-wire facilities suitable for low speed, unidirectional series-operated signaling, and may be implemented by either metallic channels or by other means at Centel's option. If provided by "other means," the transmission specifications are described in a Bell System Technical Reference for low speed signaling channels.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 3

SERVICES AND RATES

2. Description of Services (Continued)

2.1 Special Signaling Service - Series 100 (Continued)

2.1.3 Rates - Intraexchange Series 100

Rates for Intraexchange Private Line Services are found in Section 20 of the General Customer Services Tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 4 Cancels Original Sheet 4

SERVICES AND RATES

2. Description of Services (Continued)

2.1 Special Signaling Service - Series 100 (Continued)

2.1.4 Rates - Interexchange Intralata Service Type 102

Monthly Service Class of Rate Charge (1) USOC Service

(A) Local channel, each, per termination on a premises

Type 102 Initial 1/4 mile $5.00 $87.30 1LMCY (3) RMC2S ( I ) Each additional 1/4 mile 1.85 0.00 1LMCY (3) RMC2S

(B) Interoffice channel, each V&H 1/4 mile

Type 102 3.35 0.00 1LMCS (4) RMC2S

(C) Interoffice channel terminal, per terminal (Two required per interoffice channel)

Type 102 0.00 0.00 OXNSS (5) RMC2S

(D) Interexchange channel

Type 102

Mileage Monthly Rate

0 to 200/4 miles $ 5.00 For each 1/4 mile 1LMC4 (6) RMC2S ( I )

201/4 to 600/4 miles 740.00 Plus $2.00 for each 1LMC4 (6) RMC2S 1/4 mile over 50 miles

Over 600/4 miles 1,540.00 Plus $1.00 for each 1LMC4 (6) RMC2S 1/4 mile over 150 miles

(See Sheet 7 for Footnotes)

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 5 Cancels Original Sheet 5

SERVICES AND RATES

2. Description of Services (Continued)

2.1 Special Signaling Service - Series 100 (Continued)

2.1.4 Rates - Interexchange Intralata Service Type 102 (Continued)

Monthly Service Class of Rate Charge (1) USOC Service

(E) Interexchange channel terminal, each (two required per interexchange channel)

Type 102 $7.70 $0.00 OXN2S (7) RMC2S ( I )

(F) Each additional point of termination of a local channel, different building, same premises, per 1/10 mile {2}

Type 102 1.20 87.30 1LMCK (8) RMC2S Minimum charge 9.95 87.30 1LMCK (8) RMC2S ( I )

(G) Each additional point of termination of a local channel in the same building {2}

Type 102 2.35 87.30 1LMCA (9) RMC2S

(1) Charge applies per point of termination. (2) Obsolete - Applicable to existing installations at existing locations for existing customers. This service may be retained or discontinued per the FCC's Report and Order in CC Docket No. 88-57 (refer to Section 1, Sheet 4.1, Par. 1.4.7). No charge is applied if the facilities used by the customer are entirely located on the customer's side of a point of interconnection and/or are part of premises wiring. (3) Obsolete USOC (1L3QY). (4) Obsolete USOC (1L3QS). (5) Obsolete USOC (OXNTS). (6) Obsolete USOC (1L3Q4). (7) Obsolete USOC (OXN3S). (8) Obsolete USOC (1L3QK). (9) Obsolete USOC (1L3QA).

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 6 SERVICES AND RATES 2. Description of Services (Continued) 2.2 Subvoice Grade Service - Series 200 2.2.1 Subvoice grade service provides, and is designed for, transmission of low speed data at rates up to 75, and up to 150, baud within certain technical specifications. These channels are furnished for half- duplex and duplex operation. The service is not suitable for the transmission of alternating current tones. 2.2.2 The types of local channels and the transmission characteristics offered for termination at a premises for termination in customer-provided terminal equipment and systems are as follows: (A) Type 250 - An interface engineered for binary signals at rates up to 75 baud, 20 + 1 or 62.5 + 2.5 milliamperes neutral signals. {1} The terminal equipment shall deliver no more than 8% telegraph distortion and shall be capable of processing received data signals with up to 35% telegraph distortion. (B) Type 251 - EIA Standard RS232C type interface engineered for binary signals at rates up to 150 baud. The terminal equipment shall deliver no more than 5% telegraph distortion and shall be capable of processing received data signals with up to 40% telegraph distortion. 2.2.3 Parameters and specifications for subvoice grade local channels used with customer-provided station equipment (CPE). Basic Parameters Specification or Limit Channel signals Local channels used with CPE. Note that the specifications of channel signals refer to the requirement of the total service offering and not the individual local channel. Channel distortion Local channels used with CPE. Note that the specifications for channel distortion refer to the requirement of the total service offering and not the individual local channel. Power requirement For up to 75 baud type - Where Centel provides transmission equipment at the interface. Customer must provide a source of continuous 117 volt, 60 Hz ac power by means of a nonswitched outlet. For up to 150 baud - Customer must in all cases provide a source of continuous 117 volt, 60 Hz ac power, nonswitched outlet. Centel will in all cases supply all voltage and current adjustments to the local channel.

{1} Centel has the option of providing 20 or 62.5 milliamperes and will notify the customer of the current level to be supplied. Centel will supply the line voltage and provide for the current adjustment. The maximum open circuit voltage across the send data leads at the interface will not exceed 270 volts.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 7 SERVICES AND RATES 2. Description of Services (Continued) 2.2 Subvoice Grade Service - Series 200 (Continued) 2.2.4 Rates - Intraexchange Rates for Intraexchange Private Line Services are found in Section 20 of the General Customer Services Tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 8 SERVICES AND RATES 2. Description of Services (Continued) 2.2 Subvoice Grade Service - Series 200 (Continued) 2.2.5 Rates - Interexchange Intralata Service Monthly Rate Service Class First Add'l Charge of 1/4 Mile 1/4 Mile {1} USOC Service

(A) Local channel, each per termination on a premises Type 250 - Half-duplex $ 9.75 $ 4.55 $ 87.30 1LMFY {2} RMCAS Duplex 15.35 7.10 87.30 1LMDY {3} RMCAS Type 251 - Half-duplex 17.50 5.50 87.30 1LMFY {2} RMCBS Duplex 24.75 7.80 87.30 1LMDY {3} RMCBS Monthly Rate (B) Interoffice channel, each V&H 1/4 mile, per channel Type 250 - Half-duplex $ 1.85 $ 0.00 1LMFS {4} RMCAS Duplex 1.85 0.00 1LMDS {5} RMCAS Type 251 - Half-duplex 2.15 0.00 1LMFS {4} RMCBS Duplex 2.15 0.00 1LMDS {5} RMCBS (C) Interoffice channel terminal, each (two required for each interoffice channel) Type 250 - Half-duplex 0.00 0.00 O1N5S RMCAS Duplex 0.00 0.00 O1N6S RMCAS Type 251 - Half-duplex 0.00 0.00 O1N5S RMCBS Duplex 0.00 0.00 O1N6S RMCBS2

{1} Charge applies per point of termination. {2} Obsolete USOCs (1LYDY) (1L6BY) (1L3AY). {3} Obsolete USOCs (1LYKY) (1L6DY) (1L3CY). {4} Obsolete USOCs (1LYDS) (1L3AS) (1L6BS). {5} Obsolete USOCs (1LYKS) (1L3CS) (1L6DS).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 9 Cancels Original Sheet 9

SERVICES AND RATES

2. Description of Services (Continued)

2.2 Subvoice Grade Service - Series 200 (Continued)

2.2.5 Rates - Interexchange Intralata Service (Continued)

Monthly Rate Service Class Each Minimum Charge of 1/10 Mile Charge (2) USOC Service

(D) Each additional point of termination of a local channel, different building on the same premises. (1) (3)

Type 250 - Half-duplex $1.20 $6.95 $87.30 1LMFK (4) RMCAS ( I ) Duplex 1.20 6.95 87.30 1LMDK (5) RMCAS ( I )

Monthly Rate

(E) Each additional point of termination of a local channel in same building (1) (3)

Type 250 - Half-duplex $2.35 $87.30 W1W RMCAS Duplex 2.35 87.30 W2W RMCAS

(1) Maximum of three terminations on the same premises for Type 250 and no additional termination for Type 251. (2) Charge applies per point of termination. (3) Obsolete - Applicable to existing installations at existing locations for existing customers. This service may be retained or discontinued per the FCC's Report and Order in CC Docket No. 88-57 (Refer to Section 1, Sheet 4.1, Par. 1.4.7). No charge is applied if the facilities used by the customer are entirely located on the customer's side of a point of interconnection and/or are part of premises wiring. (4) Obsolete - USOCs (1LYDK) (1L3AK) (1L6BK). (5) Obsolete - USOCs (1LYKK) 91L3CK) (1L6DK).

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 10 SERVICES AND RATES 2. Description of Services (Continued) 2.2 Subvoice Grade Service - Series 200 (Continued) 2.2.5 Rates - Interexchange Intralata Service (Continued) (F) Interexchange channel Type 250 Class of Mileage Monthly Rate USOC Service 0 to 200/4 miles $ 0.90 For each 1/4 mile 1LMD4 {1} RMCAS 201/4 to 600/4 miles 180.00 Plus $0.55 for 1LMD4 {1} RMCAS each 1/4 mile over 50 miles Over 600/4 miles 400.00 Plus $0.40 for 1LMD4 {1} RMCAS each 1/4 mile over 150 miles Type 251 Class of Mileage Monthly Rate USOC Service 0 to 200/4 miles $ 1.20 For each 1/4 mile 1LMD4 {1} RMCBS 201/4 to 600/4 miles 240.00 Plus $0.55 for 1LMD4 {1} RMCBS each 1/4 mile over 50 miles Over 600/4 Miles 460.00 Plus $0.40 for 1LMD4 {1} RMCBS each 1/4 mile over 150 miles (G) Interexchange channel terminal, each (two required per inter- exchange channel) Service Monthly Rate Charge USOC Type 250 - Half-duplex $ 9.40 $ 0.00 O1N2S Duplex 9.00 0.00 O1N3S Type 251 - Half-duplex 22.20 0.00 O1N2S Duplex 21.65 0.00 O1N3S

{1} Obsolete USOCs (1LYK4) (1L3C4) (1L6D4).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 11 SERVICES AND RATES 2. Description of Services (Continued) 2.3 Voice Grade Service - Series 300 and 400 2.3.1 Series 300 local channels for voice grade service are furnished for half-duplex (voice or data use) and duplex (data use) operations for oral communications, and data communications which operate within certain technical specifications. Unless expressly provided for elsewhere, these are the only channels provided for voice grade transmission. The various types of local channels which are offered for termination in terminal equipment and systems (except as provided in 1.3) provided on a customer, authorized or joint user premises are as follows: (A) Type 314 -- Furnished for tie line use between a premises PBX (or similar) switching system and a Centrex (with switching equipment located on Centel premises) (314B); or between two Centrexs (with switching equipment located on Centel premises) (314C). Transmission specifications for 314B channels are two-wire or four-wire interfaces with effective four-wire facilities engineered to VNL design specifications for tie line use. E&M signaling is included in the local channel. (B) Type 315 -- Furnished for voice transmission, off-premises extension (Non-PBX) and off- premises Centrex (with switching equipment located on Centel premises) station and/or extension station use. (C) Type 317 -- Furnished for voice transmission, (317A) telephone answering service between concentrator and identifier. (317B) furnished for use with the AUTOTAS telephone answering service offering between the electronic concentrator and the traffic director. (D) Type 322 -- Furnished for half-duplex data transmission for an automatic identified outward dialing (AIOD) data channel. For use between a premises PBX (or similar) switching system and a serving office. (E) Type 323 - Furnished for use with Centrex (with switching equipment located on Centel premises) data link consoles. For service between the premises control cabinet and the serving office. (F) Type 342 -- Furnished for data transmission for DATAPHONE Select-a-Station Service use. For service between a Data Station Selector (DSS) and remote station requiring a two-wire interface. (G) Type 343 -- Furnished for data transmission for DATAPHONE Select-a-Station Service use. For service between a Selector Control Unit (SCU) and DSS or between a DSS and remote station requiring a four-wire interface. Bridging charges per channel bridged apply when three or more voice grade channels, connect at the same location. Bridging charges do not apply to types 315, 317A, 317B, 342, 343 and Series 600.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 12 SERVICES AND RATES 2. Description of Services (Continued) 2.3 Voice Grade Service - Series 300 and 400 (Continued) 2.3.2 Series 400 local channels are furnished for use as the customer elects and operate within certain technical specifications. The various types and the transmission characteristics of local channels which are offered for termination at a premises for connection to only customer-provided terminal equipment and systems are as set forth following: (A) Type 420 -- A four-wire interface with four-wire facilities engineered for a 1000 Hz net loss of 16 dB. Normally suitable for use as a full duplex data channel. {1} (B) Type 422 -- A two-wire interface with effective two-wire facilities engineered for a 1000 Hz net loss of 16 dB. Normally suitable for use as a half-duplex data channel. {1} (C) Type 423 -- A two-wire interface with effective two-wire facilities engineered for a 1000 Hz net loss of 10 dB for two-point service and up to 20dB for multipoint service. Normally suitable for use as a voice channel. {1} (D) Type 424 -- A two-wire of four-wire interface with effective four-wire facilities engineered to VNL design specification for tie line use. Normally suitable for use as a tie line between two premises PBXs (or similar) switching systems. (E) Type 425 -- A four-wire interface with four-wire facilities engineered for a 1000 Hz net loss of 16 dB. Normally suitable for use as a voice channel. (F) Type 428 -- A two-wire interface with effective two-wire facilities engineered for a 1000 Hz net loss of VNL +4 dB. Normally suitable for use as a main or extension station of a premises PBX (or similar) switching system. Additional signaling arrangements may be required. (G) Type 435 -- A two-wire interface with four-wire facilities engineered for a 1000 Hz net loss of 16 dB. Normally suitable for use as a multipoint voice channel where two-way communications are required. Signaling options required to arrange Series 400 channels for suitable signaling are available at charges specified in Section 2 of this tariff. The application of signaling options currently provided to arrange Series 400 on premises, same building and additional point of termination services has been obsoleted to existing installations at existing locations for existing customers.

{1} Type 420 through Type 423 local channels are not suitable for, nor can they be used for switching and/or tandem operations to the public switched network or other private line services.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 13 SERVICES AND RATES 2. Description of Services (Continued) 2.3 Voice Grade Service - Series 300 and 400 (Continued) 2.3.2 (Continued) (G) (Continued) Bridging charges per channel bridged apply when three or more voice grade channels connect at the same location. Customers must insure that neither direct transmitted signal nor reflected signal energy is allowed to violate interconnection protection criteria and regulations as set forth in the Regulations section of this tariff. Specifications of net loss (or gain) refer to the requirement of the total channel offering, not the individual local channel. Gains or losses present in CPE have not been included. 2.3.3 Parameters and specifications for two-point service used with customer-provided station equipment are as follows: Speech application specifications and limits apply to all local channels except Type 420 and 422. Data application specifications and limits apply only to Types 420 and 422. Parameters and specifications for Types 342 and 343 are provided in Bell System Technical Reference PUB 41014. Basic Parameters Specification or Limit Net loss Local channels used with customer-provided station equipment -- Limit as specified in standard Bell System design practices and/or Technical References. The specifications of net loss or gain refer to the requirements of the total channel service offering, not the individual local or interoffice channel. Losses or gains present in CPE have not been included. DC resistance Local channels used with customer-provided station equipment. Limit as specified in standard Bell System design practices and/or Technical References. Does not imply or guarantee end to end DC continuity. Frequency error + 5 Hz Frequency response 300-3000 Hz, -3 dB to +12 dB 500-2500 Hz, -2 dB to +8 dB ("+" means loss and "-" means gain) Envelope delay For speech application, not controlled. For AIOD Application, less than 1750 microseconds, 800-2600 Hz. Distortion For data application, less than 1000 microseconds, 1000-2400 Hz; less than 1750 microseconds, 800-2600 Hz.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 14 SERVICES AND RATES 2. Description of Services (Continued) 2.3 Voice Grade Service - Series 300 and 400 (Continued) 2.3.3 (Continued) Basic Parameters Specification Or Limit -13 dBmO 1000 Hz For speech application, 20 dB. test signal to C-notched noise ratio For data application, 24 dB. Impulse noise For speech application, 90 counts in 15 minutes at a threshold of 1 dB below a -13 dBmO rms 1000 Hz test signal. For data application, 15 counts in 15 minutes at a threshold of 6 dB below a -13 dBmO rms 1000 Hz test signal. Phase jitter For speech application, 18 degrees peak to peak. For data applications, 10 degrees peak to peak. Non-linear For speech application, 20 dB. distortion signal to 2nd order distortion For data application, 25 dB. Signal to 3rd For speech application, 25 dB. order distortion For data application, 30 dB. 2.3.4 Multipoint Centel will provide bridging equipment in service offices and primary serving offices to provide multipoint service. Bridging charges apply per channel (interoffice channel, local channel and interexchange channel) in offices where three or more channels are bridged. Bridging charges do not apply to Foreign Exchange, Foreign Serving Office and Type 315, 317A, 317B, 342, 343 and Series 600. See 2.3.5(K) for intraexchange charges and 2.3.6(H) for interexchange charges. Standard bridging equipment will be provided unless the customer specifies another bridging arrangement. The following restrictions are applicable to multipoint service: The channel is limited to no more than five (5) points and/or 4000 circuit miles on two-wire services and no more than 20 points and/or 4000 circuit miles on four-wire circuits. These restrictions do not apply to one-way simultaneous transmission from a master station to all other stations such as broadcast type multipoint service. The transmission parameters specified in 2.3.3, preceding, are not applicable.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 15

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.5 Rates - Intraexchange

Rates for Intraexchange Private Line Services are found in Section 20 of the General Customer Services Tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 16 Cancels Original Sheet 16

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.6 Rates - Interexchange Intralata Service (Continued)

(A) Local channel, each, per termination on a premises

Monthly Rate Service Class First Additional Charge of 1/4 Mile 1/4 Mile (1) USOC Service

Type 314B (10) $29.85 $ 9.25 $174.60 1LTBY FPSVS Type 314C 0.00 0.00 174.60 1LTCY FPSVS Type 317A 10.20 5.10 174.60 1LJKY FPSVS Type 317B 10.20 5.10 174.60 1LJJY FPSVS Type 322 34.25 14.40 174.60 1L6QY DATYS Type 342 8.95 5.50 87.30 1L6EY DS5CS ( I ) Type 343 25.25 7.80 87.30 1L6FY DS5DS Type 420 17.10 9.95 87.30 1LMDY (2) PVLCS ( I ) Type 422 17.10 9.95 87.30 1LMFY (3) PVLES Type 423 7.70 3.60 87.30 1LMGY (4) PVLFS Type 424 (10) 16.50 11.00 87.30 1LMHY (5) PVLGS ( I ) Type 425 12.40 7.80 87.30 1LMJY PVLHS Type 428 12.50 5.50 87.30 1LMKY (6) PVLLS ( I ) Type 435 18.35 7.80 87.30 1LMMY (7) PVL5S

(B) Interoffice channel, each V&H 1/4 mile per channel

Service Class Monthly Charge of Rate {1} USOC Service

$4.50 $0.00 1LMFS (8) (9) ---- ( I )

Footnotes:

(1) Charge applies per point of termination. (2) Obsolete USOCs (1L6CY) (1LLCY). (3) Obsolete USOCs (1L6AY) (1LLDY). (4) Obsolete USOCs (1LPAY) (1L1OY) (1L3AY) (1LLBY). (5) Obsolete USOC (1LTAY). (6) Obsolete USOCs (1LPRY) (1LVRY). (9) Obsolete USOCs (1LJKS) (1LPJS) (1L3AS) (1L1OS) (1LVRS) (1L6DS). (10) When service terminates in a SmartTrunk Interface, a Local Channel charge will not apply for that location. All other appropriate circuit charges specified in this tariff will apply to the remainder of the circuit.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 17 Cancels Original Sheet 17

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.6 Rates - Interexchange Intralata Service (Continued)

Monthly Service Class of Rate Charge USOC Service

(C) Interoffice channel terminal, each (two required per interoffice channel)

Type 314B $0.00 $0.00 PMN4B FPSVS Type 314C 0.00 0.00 PMN4C FPSVS Type 317A 0.00 0.00 PMN17 FPSVS Type 317B 0.00 0.00 PMNB7 FPSVS Type 322 0.00 0.00 PMN22 DATYS Type 323 0.00 0.00 PMN23 DATYS Type 342 0.00 0.00 PMN42 DS5CS Type 343 0.00 0.00 PMN43 DS5DS Type 420 0.00 0.00 PMNCL (1) PVLCS Type 422 0.00 0.00 PMNEL (2) PVLES Type 423 0.00 0.00 PMNFL (3) PVLFS Type 424 0.00 0.00 PMNGL (4) PVLGS Type 425 0.00 0.00 PMNHL PVLHS Type 428 0.00 0.00 PMNLL (5) PVLLS Type 435 0.00 0.00 PMN5L (6) PVL5S Foreign Exchange 0.00 0.00 PMNFX EXCHANGE

(D) Bridging charge, (multipoint service), per local channel or interoffice channel bridged $14.50 $0.00 BQ7 (7) ---- ( I ) per interexchange channel bridged 11.70 0.00 BQ71X ----

(1) Obsolete USOC (PMN3A). (2) Obsolete USOC (PMN3B). (3) Obsolete USOC (PMN11). (4) Obsolete USOC (PMN4A). (5) Obsolete USOCs (PMN2S) (PMNDS). (6) Obsolete USOC (PMN2O). (7) Additional USOC (BQ7AL).

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 18 Cancels Original Sheet 18

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.6 Rates - Interexchange Intralata Service (Continued)

(E) Each additional point of termination of a local channel in different building, same premises. (1) (3)

Monthly Rate Service Class Each Minimum Charge of 1/10 Mile Charge (2) USOC Service

Type 420 $1.20 $6.95 $87.30 1LMDK (4) PVLCS ( I ) Type 422 1.20 6.95 87.30 1LMFK (5) PVLES Type 423 1.20 6.95 87.30 1LMGK (6) PVLFS Type 425 1.20 6.95 87.30 1LMJK (7) PVLHS Type 435 1.20 6.95 87.30 1LMKK PVL5S Extension Line 1.20 6.95 0.00 1LLBK EXCHANGE ( I )

(F) Each additional point of termination of a local channel in same building.(1) (3)

Service Class Monthly Charge of Rate (2) USOC Service

Type 420 $2.35 $87.30 MUXD3 (8) PVLCS Type 422 2.35 87.30 M8XF3 (9) PVLES Type 423 2.35 87.30 M8XG3 (10) PVLFS Type 425 2.35 87.30 MUXJ3 PVLHS Type 435 2.35 87.30 M8XK3 (11) PVL5S

(1) Additional points of termination do not apply for Types 314B, 342, 343, 424 and 428. (2) Charge applies per point of termination. (3) Obsolete - Applicable to existing installations at existing locations for existing customers. This service may be retained or discontinued per the FCC's Report and Order in CC Docket No. 88-57 (Refer to Section 1, Sheet 4.1, Par. 1.4.7). No charge is applied if the facilities used by the customer are entirely located on the customer's side of a point of interconnection and/or are part of premises wiring. (4) Obsolete USOC (1L6DK). (5) Obsolete USOC (1L6BK). (6) Obsolete USOCs (1LPJK) (1L3AK) (1L1OK). (7) Obsolete USOCs (1LPWK) (1L1MK) (1L3WK). (8) Obsolete USOC (MUX). (9) Obsolete USOC (M8X). (10) Obsolete USOCs (2SE) (M8X). (11) Obsolete USOC (M8X23).

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 19

SERVICES AND RATES

2. Description of Services (Continued) 2.3. Voice Grade Service - Series 300 and 400 (Continued) 2.3.6 Rates - Interexchange Intralata Service (Continued) (G) Interexchange channel - Schedule 1 (Applies between two category "A" primary serving offices) Mileage Monthly Rate USOC 0 to 200/4 miles $ 0.90 For each 1/4 mile 1LHU4 201/4 to 600/4 miles 180.00 Plus $0.55 for each 1LHU4 1/4 mile over 200/4 miles Over 600/4 miles 400.00 Plus $0.45 for each 1LHU4 1/4 mile over 600/4 miles - Schedule 2 (Applies between a category "A" and category "B" primary serving office) Mileage Monthly Rate USOC 0 to 200/4 miles $ 1.45 For each 1/4 mile 1LHV4 201/4 to 600/4 miles 290.00 Plus $0.95 for each 1LHV4 1/4 mile over 200/4 miles Over 600/4 miles 670.00 Plus $0.55 for each 1LHV4 1/4 mile over 600/4 miles - Schedule 3 (Applies between two category "B" primary serving offices) Mileage Monthly Rate USOC 0 to 200/4 miles $ 1.75 For each 1/4 mile 1LHW4 201/4 to 600/4 miles 350.00 Plus $1.20 for each 1LHW4 1/4 mile over 200/4 miles Over 600/4 miles 830.00 Plus $0.75 for each 1LHW4 1/4 mile over 600/4 miles

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 20 Cancels Original Sheet 20

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 - and 400 (Continued)

2.3.6 Rates - Interexchange Intralata Service (Continued)

Monthly Service Class of Rate Charge (1) USOC Service

(H) Interexchange channel terminal, (two required per interexchange channel)

Type 314B $ 7.80 $0.00 P1NH1 FPSVS Type 314C 50.15 0.00 P1NJ1 FPSVS Type 317A 18.20 0.00 P1NK1 FPSVS Type 317B 18.20 0.00 P1NX1 FPSVS Type 322 57.70 0.00 P1NM1 DATYS Type 342 2.25 0.00 P1N01 DS5CS Type 343 5.60 0.00 P1NP1 DS5DS Type 420 5.00 0.00 P1NQ1 (1) PVLCS ( I ) Type 422 5.00 0.00 P1NR1 (2) PVLES Type 423 6.95 0.00 P1NS1 (3) PVLFS Type 424 9.95 0.00 P1NT1 (4) PVLGS ( I ) Type 425 4.20 0.00 P1NU1 PVLHS Type 428 9.25 0.00 P1NV1 (5) PVLLS ( I ) Type 435 2.65 0.00 P1NW1 (6) PVL5S Foreign Exchange Between exchanges 0 to 7 miles apart 8.70 0.00 P1NF1 EXCHANGE Between exchanges over 7 miles apart 33.15 0.00 P1NF4 EXCHANGE

(1) Obsolete USOC (P1NC1). (2) Obsolete USOC (P1NE1). (3) Obsolete USOC (P1NA1). (4) Obsolete USOC (P1NG1). (5) Obsolete USOCs (P1NB1) (P1ND1). (6) Obsolete USOC (P1NL1).

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 21 SERVICES AND RATES

2. Description of Services (Continued) 2.2 Voice Grade Service - Series 300 and 400 (Continued) 2.3.7 Conditioning Options - Available for Types 314C, 343, 420 and 422 (A) The types and description of the available conditioning options are as follows: Type C - Conditioning provides assured transmission quality for frequency response and envelope delay distortion as specified below: Type C1 - For a two-point or multipoint channel -- the envelope delay distortion shall not exceed: between 1000 and 2400 Hz, a maximum difference of 1000 microseconds. -- the loss deviation with frequency (from 100 Hz, reference) shall not exceed: between 1000 and 2400 Hz, -1 dB to +3 dB. between 300 and 2700 Hz, - 2 dB to +6 dB. ("+" means loss, "-" means gain) Type C2 - For a two-point or multipoint channel -- the envelope delay distortion shall not exceed: between 1000 and 2600 Hz, a maximum difference of 500 microseconds. between 600 and 2600 Hz, a maximum difference of 1500 microseconds. between 500 and 2800 Hz, a maximum difference of 3000 microseconds. -- frequency response shall not exceed: between 500 and 2800 Hz, -1 dB to +3 dB. between 300 and 3000 Hz, -2 dB to +6 dB. ("+" means loss, "-" means gain) Type C3 - For access lines and trunks associated with a switched circuit automatic network or common control switching arrangement access lines -- the envelope delay distortion shall not exceed: between 1000 and 2600 Hz, a maximum difference of 110 microseconds. between 600 and 2600 Hz, a maximum difference of 300 microseconds. between 500 and 2800 Hz, a maximum difference of 650 microseconds. -- frequency response shall not exceed: between 500 and 2800 Hz, -0.5 dB to +1.5 dB. between 300 and 3000 Hz, -0.8 dB to 3 dB. ("+" means loss, "-" means gain)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 22 SERVICES AND RATES

2. Description of Services (Continued) 2.3 Voice Grade Service - Series 300 and 400 (Continued) 2.3.7 Conditioning Options - Available for Types 314C, 343, 420 and 422 (Continued) (A) (Continued) Trunks -- the envelope delay distortion shall not exceed: between 1000 and 2600 Hz, a maximum difference of 80 microseconds. between 600 and 2600 Hz, a maximum difference of 260 microseconds. between 500 and 2800 Hz, a maximum difference of 500 microseconds. -- frequency response shall not exceed: between 500 and 2800 Hz, -0.5 dB to +1 dB. between 300 and 3000 Hz, -0.8 dB to +2 dB. ("+" means loss, "-" means gain) Conditioning per these specifications limited to each interexchange or local access line between the customer's station and the switching center. Type C4 - For a two-point or three-point -- the envelope delay distortion shall not exceed: between 1000 and 2600 Hz, a maximum difference of 300 microseconds. between 800 and 2800 Hz, a maximum difference of 500 microseconds. between 600 and 3000 Hz, a maximum difference of 1500 microseconds. -- frequency response shall not exceed: between 500 and 3000 Hz, -2 dB to +3 dB. between 300 and 3200 Hz, -2 dB to +6 dB. ("+" means loss, "-" means gain) NOTE: On a three-point channel, conditioning per above specifications is applicable only between one station (that designated by the customer as the control point) and each of the other two stations. Type C5 - For a two-point channel -- the envelope delay distortion shall not exceed: between 1000 and 2600 Hz, a maximum difference of 100 microseconds. between 600 and 2600 Hz, a maximum difference of 300 microseconds. between 500 and 2800 Hz, a maximum difference of 600 microseconds. -- frequency response shall not exceed: between 300 and 3000 Hz, -1.0 dB to +3.0 dB. between 500 and 2800 Hz, -0.5 dB to +1.5 dB. ("+" means loss, "-" means gain)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 23 SERVICES AND RATES

2. Description of Services (Continued) 2.3 Voice Grade Service - Series 300 and 400 (Continued) 2.3.7 Conditioning Options - Available for Types 314C, 343, 420 and 422 (Continued) (A) (Continued) Type D1 - High performance data conditioning for a two-point channel not arranged for switching {1} -- Signal to C-notched noise ratio 28 dB -- Non-linear distortion: Signal to second order distortion 35 dB Signal to third order distortion 40 dB When the channel equipped with this conditioning is used for voice communications, Centel does not undertake to represent nor guarantee that the channel will be suitable for such transmission.

{1} Available only where facilities and conditions permit.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 24 Cancels Original Sheet 24

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.7 Conditioning Options - Available for Types 314C, 343, 420 and 422 (Continued)

(B) Rates

Monthly Service Rate Charge USOC Type C1

Two-point not arranged for switching, per station $13.75 $72.75 P2W ( I )

Two-point arranged for switching to another two- point channel, per station 18.35 72.75 P2X

Multipoint channel, per station 20.30 72.75 P3G

Type C2

Two-point not arranged for switching, per 40.50 90.95 P3HC2

Two-point arranged for switching, per station 60.85 90.95 P3J

Multipoint channel, per station 60.85 90.95 PH9

Type C3

On channels associated with a switched circuit automatic network or common control switching arrangement

local access line, each 16.50 123.65 P6W ( I )

interexchange access line, per exchange 50.65 123.65 P7W

trunk line, per exchange 48.70 123.65 P7G

Incremental conditioning for above local or inter- exchange access lines associated with a switched circuit automatic network to provide for operation with non-conditioned trunk lines, per access line 50.65 123.65 DJKGV

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 25 Cancels Original Sheet 25

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.7 Conditioning Options - Available for Types 314C, 343, 420 and 422 (Continued)

(B) Rates (Continued)

Monthly Service Rate Charge USOC

Type C4

Two-point channel, per station $70.95 $123.65 P4G

Three-point channel, per station 91.20 123.65 6DU

Type C5

On a two-point channel not arranged for switching, per station 101.35 123.65 UHD

Type D1 (1)

Two-point channel not arranged for switching, per station 16.50 90.95 QHA ( I )

(1) Available only where facilities and conditions permit.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 26

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.8 Foreign Exchange and Foreign Exchange Centrex (with switching equipment located on Centel premises) station service.

(A) This service is furnished to a maximum of two exchanges (in addition to the exchange in which the exchange service is furnished). The exchange service connection is provided from one exchange only.

(B) Service is furnished on the condition that additional costs to Centel may be necessary to provide a type of signaling suitable for operation with the exchange from which service is furnished, or to provide, at the customer's request, a type of signaling other than the type Centel would elect to furnish. In such cases, additional charges shall apply.

(C) Customers, for the exchange portion of the service, are subject to exchange charges and regulations; and for the private line portion of the service, are subject to the private line charges and regulations in this tariff.

(D) Off-premises extensions are provided only where facilities and conditions permit.

(E) The term "foreign exchange" refers to any telephone exchange other than the one from which the local customer is normally served. Foreign exchange service uses a private line circuit to connect the distant primary serving office (PSO) telephone number location to a PSO of another exchange where service is to be terminated at a customer location. Interexchange channel mileage and channel terminal charges as specified in 2.3.6(H) and 2.3.6(G) of this tariff are applicable for this portion of the circuit. In addition, interexchange interoffice channel mileage and channel terminal charges as specified in 2.3.6(B) and 2.3.6(C) of this tariff may be applicable. End user common line (EUCL) and TOUCH-TONE line charges are not applicable. No charge applies for a primary directory listing. A point of termination charge as specified in (F), following, is applicable. Local channel charges apply for all main and extension channels as specified in (F), following. Charges apply per minute of local exchange access use as specified in (F), following. Long distance message telecommunication service charges apply for telecommunications between station numbers in different local service areas.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Second Revised Sheet 27 Cancels First Revised Sheet 27

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.8 Foreign Exchange Service (Business Only) (Continued) (C)

(F) Rates

Per minute of local exchange access use $0.021

Where the minutes of actual use cannot be determined, monthly usage charges will apply based on the following assumed average minutes of use:

PBX trunk 3248 Business line 1040 (D) Monthly Service Rate Charge USOC

Local channel, each (5) $16.00 $186.00 1LLAY Point of termination in one foreign exchange 0.00 $174.60 T22 Point of termination in two exchanges 0.00 261.90 T1S

Remote busy line indicator To indicate when a foreign exchange line is in use. A maximum of six indicators may be operated from one common equipment. A signaling channel from the serving central office to the location of the remote indicator is required.

Monthly Service Rate Charge USOC Remote location within serving central office area: Common equipment (1) (4) $ 3.30 $14.55 Q3T Lamp indicators Tariff Rate Signaling channel Tariff Rate

Remote location outside the serving central office area but within the serving exchange: Common equipment (2) (4) 5.00 14.55 Q3U Lamp indicators Tariff Rate Continuous type signal relay (3) Tariff Rate Signaling channel Tariff Rate

(G) Reversible operation and intercept arrangement 38.40 0.00 FXV

(1) Common equipment located on the customer's premises. (2) Common equipment located at central office. (3) Required whenever remote indicator is located outside the serving central office area. (4) Obsolete - Applicable to existing installations at existing locations for existing customers. (5) When Foreign Exchange Service terminates in a SmartTrunk Interface, a Local Channel charge will not apply for that location. All other appropriate circuit charges specified in this tariff will apply to the remainder of the circuit.

ISSUED: October 22, 2008 EFFECTIVE: November 1, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 28

SERVICES AND RATES

2. Description of Services (Continued)

2.3 Voice Grade Service - Series 300 and 400 (Continued)

2.3.9 Foreign serving office and Centrex (with switching equipment located on Centel premises) station service

(A) This service is furnished to a maximum of two serving offices (in addition to the serving office in which the exchange service is furnished) within the exchange or metropolitan exchange in which the exchange service is furnished.

(B) Service is furnished on the condition that additional costs to Centel may be necessary to provide a type of signaling suitable for operation with the serving office from which service is furnished, or to provide, at the customer's request, a type of signaling other than the type would elect to furnish. In such cases, additional charges will apply.

(C) Customers, for the exchange portion of the service, are subject to exchange charges and regulations; and for the private line portion of the service, are subject to the private line charges and regulations in this tariff.

(D) Off-premises extensions are provided only where facilities and conditions permit. Type 315 local channel charges apply for off-premises extension.

(E) Rates

Monthly Service Rate Charge USOC

Point of termination in one foreign serving office {1} . . . . . $ 0.00 $174.60 T21FS

Point of termination in two foreign serving offices {2} . . . . 30.40 261.90 T1SFS

{1} In addition, private line charges as set forth in this tariff apply between the serving office of the customer premises and the serving office from which the exchange service is provided. Local channel charges do not apply to main stations but do apply to Centrex main stations and extensions. {2} Local channel charges do not apply to the main station and one extension but do apply to Centrex main stations and extensions.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 29

SERVICES AND RATES

2. Description of Services (Continued)

2.4 Reserved for Future Use

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 30 SERVICES AND RATES 2. Description of Services (Continued) 2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 2.5.1 Description of Series 600 Channels and Schedule Classifications (A) Facilities, specially equipped and operated for program transmission in one direction of music or speech. (B) Program transmission channels in connection with loudspeakers may be interconnected at Centel premises to form a network for the distribution of program material to a number of loudspeaker locations. The points at which such interconnection of such channels is made are called "distribution centers." (C) The channel facilities covered in 2.5 are the only channel facilities furnished by for use with equipment provided by Centel for program transmission in connection with loudspeakers and sound recording. (D) Channels furnished in connection with loudspeakers may be connected with paging systems. Channels furnished in connection with loudspeakers and sound recording may be interconnected with channels furnished in connection with radio broadcasting. (E) All station equipment and station wiring, other than any equipment necessary for the suitable termination of the channel facilities on the customer's or his patron's premises shall be provided by the customer. (F) Channels for program transmission in connection with loudspeakers and sound recording may be used only by the customer, except that emergency civil defense warning announcements may be made by authorized civil defense officials. Where such announcements are to be made by means of program transmission channels furnished by Centel between the civil defense office and the customer's studio. (G) Channels for program transmission in connection with loudspeakers and sound recording are furnished only directly to the customer originating the program. material. Centel does not allocate charges between, nor collect charges from, the patrons of the customer. The customer is responsible for the payment of all charges for channels furnished to him or her by Centel. (H) Channels for program transmission in connection with loudspeakers and sound recording may be furnished from an originating station to a station at fixed premises of the customer from which point separate channels will be furnished to patrons of the customer or other fixed premises of the customer for distribution to patrons of the customer. Mileage between these locations shall be measured per the provisions of 2.5.2(B)(1). Channels for program transmission in connection with loudspeakers and sound recording may be furnished from fixed premises of the customer to a distributing center, from a distributing center to patrons of the customer. Mileage between these locations shall be measured per the provisions of 2.5.2(B)(2).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 31 SERVICES AND RATES 2. Description of Services (Continued) 2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued) 2.5.2 Mileage Measurements (A) Interexchange Channels Interexchange channel rates apply between exchanges or noncontiguous zones of metropolitan exchanges. These rates are based on the airline distance between rate centers. Each exchange and each zone of a metropolitan exchange has a rate center. Where a station is not located in an exchange area, the location of the station or termination is considered to be the rate center. (1) Two-point Service The interexchange pricing mileage is the airline distance between the service points or between a service point and the point of connection with the facilities of another company in those cases where "other line" charges of another company are applied. In those cases where "other line" charges apply, Centel's maximum interexchange pricing mileage shall be the airline distance between the rate centers. (2) Multipoint Service (a) The interexchange mileage for multipoint service is the shortest airline mileage connecting service points which will produce the lowest total interexchange mileage charge. The airline distance between each pair of points is determined as per (1), preceding. (b) When the customer requests that the service points be connected in a specified sequence, the interexchange mileage is the shortest airline mileage determined as per (a), preceding, which will connect the service points in the specified sequence. (3) Interconnection Networks (a) Two or more interexchange networks or sections of networks will be connected at a service point designated by the customer or, when such service point is not so designated, at the service point which will result in the lowest total charge to the customer. (b) When networks are interconnected, the mileages will be determined separately for each network as per 2.5.2(A)(1) and (2).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 32 SERVICES AND RATES 2. Description of Services (Continued) 2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued) 2.5.2 Mileage Measurements (A) Interexchange Channels (Continued) (4) Point of Connection with Local Channels in Program Exchange Areas In the program exchange areas as defined in 2.5.3, interexchange channels from a service point outside of the program exchange area may terminate within the program exchange area at more than one point. In such cases the interexchange mileage will be measured to that point which will result in the lowest total charges to the customer, taking into consideration the availability of suitable interexchange channels, the charges for local channels, connections and other items of facilities and services. (B) Local Channels - Type 600 (1) Two-point Service The local mileage is the airline distance (fractional quarter miles being considered as full quarter miles) measured on a standard map between two stations or between a station and the point of connection with an interexchange channel. (2) Multipoint Service (a) Local network mileage is the sum of the airline distances between the customer's studio (or point of connection with an interexchange channel) via its serving central office and the first distributing center, and between each distributing center and each station (or point of connection with an interexchange channel) served therefrom via the serving central office of the station and the shortest combination of airline distances connecting distributing centers. The distances between each pair of points is determined as per 2.5.2(B)(1). (b) When the customer requests that the distributing centers be connected in a specified sequence, the mileage between centers is the shortest airline mileage determined per (a), preceding, which will connect the distributing centers in the desired sequence. 2.5.3 Program Exchange Areas The program exchange area is the exchange, district exchange, metropolitan exchange or extended service exchange areas.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 33

SERVICES AND RATES

2. Description of Services (Continued)

2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued)

2.5.4 Interconnection of Facilities

Interconnections of channels as set forth below may be made by a customer (or arranged for by a customer) at a studio or audio broadcasting transmitter, provided that such interconnections will not result in the connection, either directly or indirectly, for through transmission of Centel interexchange channels with interexchange channels of others, and further provided that no interference with or impairment of service rendered by Centel will result.

Connection with Centel interexchange channels can be made by a customer only via local channels of Centel.

-- Local channels of SWBT may be connected with interexchange channels of others when such channels operate on frequencies assigned for frequency modulation broadcasting (FM broadcast channels).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 34

SERVICES AND RATES

2. Description of Services (Continued)

2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued)

2.5.5 Rates

(A) Interexchange Intralata Channels

(1) Facilities suitable for the transmission of program material within the approximate frequency range of 50 to 8,000 Hz.

Monthly Class of Rate USOC Service

Mileage charge, per airline mile ...... $ 15.55 1LG44 POMMS

Station connections, per point of connection with a local channel . . . . . 249.45 SG5PG POMMS

(2) Facilities suitable for the transmission of program material within the approximate frequency range of 100 to 5,000 Hz.

Monthly Class of Rate USOC Service

Mileage charge, per airline mile ...... $ 12.40 1LG34 POMMS

Station connections, per point of connection with a local channel . . . . 148.10 SK5PG POMMS

(3) Facilities suitable for the transmission of program material within the approximate frequency range of 200 to 3,500 Hz.

Monthly Class of Rate USOC Service

Mileage charge, per 1/4 mile ...... $ 1.95 1LGN4 POMMS

Bridging connections, per point of connection with a local channel . . . . 40.50 5FT POMMS

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 35

SERVICES AND RATES

2. Description of Services (Continued)

2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued)

2.5.5 Rates (Continued)

(A) Interexchange Intralata Channels (Continued)

(4) Facilities suitable for the transmission of program material within the approximate frequency range of 300 to 2,500 Hz.

Monthly Class of Rate USOC Service

Mileage charge, per 1/4 mile ...... $ 1.75 1LGM4 POMMS

Bridging connections, per point of connection with a local channel . . . . . 40.50 5FR POMMS

(B) Local Channels

Mileage charge, per two-point channel, or for the extension of a channel from a serving central office. {1}

Service Monthly Charge Class of Rate {2} USOC Service

(1) For a channel within the same building {3}. . $ 4.80 $ 0.00 1LGRB POMML 0.00 65.50 AEVBM POMML (2) Between different buildings on continuous property {3} - Each 1/10 mile, air line ...... 1.90 0.00 1LGRE POMML 0.00 65.50 AEVBM POMML - Minimum charge . . . . 4.80 0.00 1LGRE POMML

{1} The maximum of such channels that may be connected to a channel from the serving central office is limited to four and may not exceed 1,000 feet route measurement in length per channel. {2} Charge applies for point of termination. {3} Obsolete - Applicable to existing installations at existing locations for existing customers. No charge is applied if the facilities used by the customer are entirely located on the customer's side of a point of interconnection and/or are part of premises wiring.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 36

SERVICES AND RATES

2. Description of Services (Continued)

2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued)

2.5.5 Rates (Continued)

(B) Local Channels (Continued)

(3) All other channels

Monthly Rate Service Class First Additional Charge of 1/4 Mile 1/4 Mile {1} USOC Service

Non- equalized . . $11.30 $0.00 $ 0.00 1LGRR POMM+ 0.00 4.10 0.00 1LGRY POMM+ 0.00 0.00 87.30 AEVPM POMM+

Equalized - approximate frequency range:

100 Hz to 5,000 Hz . . 12.10 0.00 0.00 1LG5R POMM+ 0.00 5.05 0.00 1LG5Y POMM+ 0.00 0.00 87.30 AEVPM POMM+

50 Hz to 8,000 Hz . . 12.60 0.00 0.00 1LG8R POMM+ 0.00 5.25 0.00 1LG8Y POMM+ 0.00 0.00 87.30 AEVPM POMM+

50 Hz to 15,000 Hz . . 13.30 0.00 0.00 1LG1R POMM+ 0.00 6.10 0.00 1LG1Y POMM+ 0.00 0.00 87.30 AEVPM POMM+

(C) Terminal Coils

Monthly Rate

Terminal coils, where required, each ...... $ 1.00 61H POMM+

{1} Charge applies for point of termination.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 37

SERVICES AND RATES

2. Description of Services (Continued)

2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued)

2.5.5 Rates (Continued)

(D) Amplifiers and Distributing Centers

(1) Amplifiers in two-point local channels or in two-point segments of local channel networks are provided at Centel distributing centers where required for transmission reasons to meet the requirements of the customer.

Monthly Service Rate Charge USOC

Per amplifier ...... $34.25 $189.15 67R

(2) Amplifiers and bridging equipment are provided at Centel serving offices. {1}

Monthly Service Rate Charge USOC

(a) Permanent amplifier and bridging equipment for 50 stations . . . . $93.55 {4} $378.25 677 for 40 stations . . . . 93.55 378.25 6LB

(b) Bridging equipment for additional stations: Each additional group of 30 stations . . . . . 12.60 {4} 48.00 67N Each additional group of 40 stations . . . . . 39.00 48.00 6LE (maximum capacity 320 stations)

(c) Distributing amplifier {2} 10 channel capacity . . 31.20 48.00 61N 19 channel capacity {3}. 53.05 48.00 61Q

{1} At the time of the installation of a permanent amplifier and bridging equipment in a distributing center, the customer's existing local channels emanating from his or her studio will be rearranged to emanate from the distributing center at charges based upon cost not to exceed the sum of the service charges which would otherwise have been applied for such rearrangement. {2} A termination agreement of 18 months applies. {3} Only one service charge applies on initial installation of the 19 channel amplifier. {4} Obsolete - Applicable to existing installations.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 38

SERVICES AND RATES

2. Description of Services (Continued)

2.5 Channels for Program Transmission in Connection with Loudspeakers and Sound Recording - Series 600 (Continued)

2.5.5 Rates (Continued)

(D) Amplifiers and Distributing Centers (Continued)

(3) Distributing amplifiers are provided at locations other than Centel distributing centers to meet the requirements of the customer such as office buildings and shopping centers, when the channels served from the distributing amplifier are limited to approximately one thousand feet route measurement in length and are confined to the same continuous property.

Monthly Service Rate Charge USOC

20 channel capacity {1} $34.25 $ 94.55 67Q

(E) Supplemental Order Channels

For rates and regulations applicable to supplemental order channels, refer to 2.3, preceding.

(F) Miscellaneous

Monthly Rate USOC

Adjustable clock timing arrangement ...... $ 16.30 61K

{1} A basic termination agreement of 24 months applies.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 39

SERVICES AND RATES

2. Description of Services (Continued)

2.6 Extension Services

2.6.1 Regulations

(A) In addition to the general regulations and definitions applicable to private line services and channels set forth in this tariff, the following regulations apply to Extension Service.

(1) Voice Grade Service (300 and 400 Series Channels)

Extension service is that of furnishing facilities for one or more stations for each authorized connection to a private line voice grade service equipped for communication among three or more stations at a time, and furnished to a branch or agency of the Centel States government for the collection and dissemination of information relating to air traffic control activities and similar information of public interest in connection with supervision of the flight of aircraft along civil airways.

(2) Subvoice Grade Services (200 Series Channels)

(a) Extension service is that of furnishing facilities to allow connection with a private line subvoice grade service furnished to a branch or agency of the Centel States government for the collection and dissemination of weather information or miscellaneous airways information pertaining to the supervision of flight of aircraft along civil airways.

(b) Connection may be made as follows:

- Receiving only service -- for reception of weather and miscellaneous airways information transmitted over the government service to which it is connected.

- Sending and receiving service -- for transmission of flight plans to and acknowledgment of such plans from the government service to which the connection is authorized.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 40

SERVICES AND RATES

2. Description of Services (Continued)

2.6 Extension Services (Continued)

2.6.2 Rates

(A) Voice Grade Services

(1) Local Channels

A charge as specified in 2.3, preceding, for two local channels to the customer's premises, applies for each extension service not located on the same premises as a government station and arranged for communication among three or more stations at one time.

(2) Station Equipment

The charges for station equipment not located on the same premises as a government station are as follows: Monthly Service Rate Charge USOC

(a) Main station equipped for communication among three or more stations at one time ...... $ 9.40 $ 0.00 2HV

(b) Extension station equipped for communication among three or more stations at one time . . . 9.40 15.05 2GY

(3) Extension Service Arrangements

(a) Where one or more extension services are located on the same premises and in the same building as a station on the government service, the following charge applies for each extension service so connected ...... 9.40 15.05 TNE

(b) Where one or more extension services are located on the same premises but in a different building as a station on the government service, the following charges apply for each extension service so connected:

First station ...... 14.05 15.05 UNE Each additional station . 9.40 15.05 TNE

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 41

SERVICES AND RATES

2. Description of Services (Continued)

2.6 Extension Services (Continued)

2.6.2 Rates (Continued)

(A) Voice Grade Services (Continued)

(3) Extension Service Arrangements (Continued)

Monthly Service Rate Charge USOC

(a) Where one or more extension services are connected to a government service by interexchange channels, the following charge applies at the exchange at which such connection is made, for each extension service so connected in addition to the charges for interexchange channels, local channels, interoffice channels and station equipment . . . . . $23.35 $ 0.00 ZME

(4) Interexchange Channels

The charges as specified in 2.3, preceding, apply.

(5) Interoffice Channels

The charges as specified in 2.3, preceding, apply.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 42 Cancels Original Sheet 42

SERVICES AND RATES

2. Description of Services (Continued)

2.6 Extension Services (Continued)

2.6.2 Rates (Continued)

(B) Subvoice Grade Services

(1) Local Channels

A charge for a local channel, as specified in 2.3, preceding, applies for each extension service not located on the same premises as a government station.

(a) Where more than one service teletypewriter is furnished on the same premises and connected via an additional station termination, the charge applicable to the connection with such additional service teletypewriter to the local channel is:

Monthly Rate USOC

$5.00 (1) 26C ( I ) 5.00 (1) 26F 5.00 (1) 26L 5.00 (1) 26Q ( I )

(b) Where an extension service station is connected to the government service at a station on the government service and is in the same airport as the government station, the charge is the same as that shown in 2.6.2(B)(1)(a), above.

(2) Connecting Arrangements

A connecting arrangement charge applies for each main station on a receiving only service which is connected by means of local, interoffice or interexchange channels.

Monthly Rate USOC

Per main station $7.50 AR2

(3) Interexchange Channels

The charges as specified in 2.2, preceding, apply.

(4) Interoffice Channels

The charges as specified in 2.2, preceding, apply.

(1) No charge is applied if the facilities used by the customer are entirely located on the customer's side of a point of interconnection and/or are part of premises wiring.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 43

SERVICES AND RATES

2. Description of Services (Continued)

2.7 Special Bridging Service

2.7.1 Split Bridging Arrangement

(A) Description of Service

This service provides for a four-wire frequency split common port and two-wire multiple port bridging arrangement intended for application in multipoint frequency, data or tone signaling networks.

(B) Application

Regulations applicable to special bridging arrangements, except as otherwise specified below, are in addition to the regulations contained in other sections of this tariff.

(C) Regulations

(1) Special bridging arrangements are provided on voice grade service with a transmission rate normally suitable for 75 baud, but can be used with equipment operating at rates up to a maximum of 400 baud.

(2) A maximum of three (3) serving offices each equipped with a special bridge is permitted on a multipoint network.

(3) A maximum of one hundred forty-four (144) remote stations is permitted on a multipoint network.

(4) Remote stations connected to a special bridge shall be in the same serving office area or contiguous serving office area of the same exchange in which the split band bridge is located.

(5) Access from the master station to the split band bridge is obtained through a master station channel as provided in 2.7.1(D)(2), following. Interoffice channels and channel terminals are required when appropriate between split band bridges and between the master station serving office and the split band bridge as provided in 2.7.1(D)(2), following.

(6) A voice grade bridging charge (BQ7) applies per split band bridge and master station, when more than one split band bridge is provided.

(7) Transmission parameters and specifications as specified in 2.3.3 are not guaranteed for this service.

(8) Additional points of termination are not provided with special bridging service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 44

SERVICES AND RATES

2. Description of Services (Continued)

2.7 Special Bridging Service (Continued)

2.7.1 Split Bridging Arrangement (Continued)

(D) Rates Monthly Rate USOC

(1) Special bridge and common equipment for: {1}

-- Maximum of 48 remote stations. . $ 60.85 BMC48 -- Maximum of 95 remote stations. . 91.95 BMC95

(2) Remote station connections

-- Per remote station ...... 6.95 BMD

(3) Access lines:

-- Master station (1LM4Y) - rates are equivalent to those applicable for Type 420 service.

-- Remote Station

Local channel, per remote station (1LM1Y) - rates are equivalent to those applicable for Type 101 service.

Interoffice channel, per V-H mile or fraction thereof, per channel (1LM1S) - rates are equivalent to those applicable for Type 101 service.

Interoffice channel terminal, per terminal (two required per interoffice channel) (OXN1L) - rates are equivalent to those applicable for Type 101 service.

{1} Customer must specify, transmit and receive frequency of master station.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 45

SERVICES AND RATES

2. Description of Services (Continued)

2.7 Special Bridging Service (Continued)

2.7.2 Passive Bridging Arrangement

(A) Description of Service

This service provides for a network of up to ten (10) passive two-wire, ten-port bridges. Each bridge is capable of connecting a combination of remote stations, interoffice channels or interbridge connections totaling nine, to one master station, interconnect station, interoffice channel or interbridge connection. This service is intended for application in multipoint voice frequency, data or tone signaling networks.

(B) Application

Regulations applicable to passive bridging arrangements, except as otherwise specified below, are in addition to the regulations contained in other sections of this tariff.

(C) Regulations

(1) Passive bridging arrangements are provided on voice grade service with a transmission rate normally suitable for 75 baud, but can be used with equipment operating at rates up to a maximum of 400 baud.

(2) A maximum of ten (10) serving offices each equipped with a passive bridge is permitted on a multipoint network.

(3) A maximum of ninety (90) remote stations is permitted on a multipoint network.

(4) Remote stations connected to a passive bridge are limited to the same serving office area in which the passive bridge is located.

(5) One master or interconnecting station or an interoffice voice grade channel is required for each passive bridge except as provided for in (6), following.

(a) When an interoffice channel is used to connect passive bridges, voice grade interoffice channel and channel terminal rates will apply.

(b) When an interoffice channel is used to connect passive bridges, mileage will be determined in the order that the passive bridges are connected.

(6) When more than one passive bridge is provided on a multipoint service in the same serving office, an interbridge connection charge applies to each subsequent bridge provided. This arrangement cannot be provided if two-way transmission is required.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 46

SERVICES AND RATES

2. Description of Services (Continued)

2.7 Special Bridging Service (Continued)

2.7.2 Passive Bridging Arrangement (Continued)

(C) Regulations (Continued)

(7) All equipment, located at a remote station, required for connecting a remote station access line to an interconnecting station access line is to be provided by the customer.

(8) Voice grade interoffice channels and/or interexchange channels and channel terminals are required when appropriate between the master station serving office and the passive bridge and between the interconnecting station serving office and the passive bridge it is connected to.

(9) Service can be provided under two circuit configurations as follows:

(a) Data collective system provides one-way transmission from remote stations to the master station and is designed to provide an end to end loss of 16 dB relative to 1000 Hz.

(b) Data polling system provides two-way transmission between the master or interconnect station and remote stations and is designed to provide an end to end loss of 38 dB relative to 1000 Hz.

(10) Additional points of termination are not provided with special bridging service.

(D) Rates Monthly Rate USOC

(1) Passive bridging arrangement capable of connecting 10 access lines {1} ...... $ 11.30 BMC10

(2) Access line connection

- Per access line...... 4.20 BT7

(3) Interbridge connection . . . . 6.25 MF7

(4) Access lines:

- Master station (1LM3Y) - rates are equivalent to those applicable for Type 101 service.

- Interconnecting station (1LM2Y) - rates are equivalent to those applicable for Type 423 service.

{1} Customer to specify either 16 dB or 38 db loss, relative to 1000 Hz, between master or interconnecting station and remote station.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 47

2. Description of Services (Cont’d)

2.8 Reserved for Future Use

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 48

SERVICES AND RATES

2. Description of Services (Continued)

2.9 DATAPHONE Select-A-Station (SAS) Service

2.9.1 Application

Except as otherwise specified below, the regulations for SAS Service specified herein are in addition to the regulations contained in other sections of this tariff.

2.9.2 Regulations

(A) DATAPHONE SAS Service requires the use of equipment, as outlined below, and channels offered elsewhere in this tariff.

(B) The customer shall provide terminal equipment per the interface specifications as described in the appropriate Bell System DATAPHONE SAS Technical Reference.

(C) Definitions

(1) Data Station Selector (DSS) - A private line device located in a Centel serving office which is capable of making connections between a four-wire input and up to 128 (125 for addressable operation) outputs, two-wire or four-wire, one at a time. DSSs are designated, as defined below, dependent upon the customer's service configuration:

- Primary DSS (PDSS) - The DSS which is connected directly to the Selector Control Unit (SCU).

- Secondary DSS (SDSS) - Any DSS which is connected to a PDSS in a tandem DSS arrangement.

(2) Selector Control Unit (SCU) - The equipment located at the master station for use by the customer to transmit control and/or address signals to the DSSs and receive supervisory signals from the DSSs.

(3) DATAPHONE SAS stations are described as follows:

- Master Station - The one station of SAS Service, located on a customer's premises, which communicates with each remote station and may control the connections.

- Remote Station - One of the many stations on SAS Service,which is connected to the master station by DSSs.

(4) SAS Service is provided in the following arrangements:

- Sequential Arrangement - An arrangement in which the order of connections made by the DSS from the master station to the remote station is fixed by the assignment of the DSS output ports at initial installation.

- Addressable Arrangement - An arrangement in which the order of connections made by the DSS from the master station to remote stations is under control of the master station.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 49

SERVICES AND RATES

2. Description of Services (Continued)

2.9 DATAPHONE Select-A-Station (SAS) Service (Continued)

2.9.3 Description of Service (A) DATAPHONE SAS Service is a multi-station, voice grade private line data service designed to establish point-to-point connections between a master station and a number of remote stations, one at a time. Direct transmission between remote stations is not possible, nor is simultaneous communications from the master to more than one remote station possible, except as described in 2.9.3(A)(3), following. (1) A DSS provides the connection between the master station and any one of up to 128 (125 for addressable operation) remote stations and/or other DSSs. Where more than one DSS is required, the DSS that is directly connected to the master station is termed the PDSS. Additional DSSs, designated SDSSs, may be connected to the PDSS. (2) An SCU is required and will be provided at the master station location. The SCU is used by the customer to transmit control and/or address signals to the DSSs and to receive supervisory signals from DSSs. (3) The dual channel option is a service arrangement that provides the capability of independently operating two primary links associated with a single PDSS. Depending upon the mode of operation of the basic service (see 2.9.3(A)(4) and 2.9.3(A)(5), following), the master station can simultaneously access one primary link and hold the other primary link as standby. In addition to the basic service components, the option requires access as specified in 2.9.3(A)(10), following. (4) SAS Service arranged for sequential operation requires customer specification, prior to installation, of the order in which connections from the DSS to the remote stations are made. The customer also must specify one of the following sequential arrangements. In addition, the customer may specify a dual channel option in the sequential operation, controlled step only. - Automatic Step - A DSS arrangement in which the duration and order of connections are fixed. - Automatic Step With Reset - A DSS option in which the duration and order of connection are fixed, but the DSS will reset to the beginning of the connection cycle upon command from the master station. - Controlled Step - A DSS option which allows the customer to have in-service control over the duration of the connection. However, the order of connections is fixed. A dual channel option is available with this operating method. A DSS optioned for automatic step or automatic step with reset cannot be used as a PDSS in a tandem DSS arrangement.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 50

SERVICES AND RATES

2. Description of Services (Continued)

2.9 DATAPHONE Select-A-Station (SAS) Service (Continued)

2.9.3 Description of Service (Continued)

(A) (Continued)

(5) SAS Service arranged for addressable operation provides a DSS arrangement in which the duration and order of connections are variables controlled by the master station. The dual channel option is available with the addressable arrangement.

(6) Access from the SCU to the PDSS is obtained through a Type 343 channel. A PDSS located outside of the serving office area where the SCU is located will require, additionally, voice grade interoffice channels and/or interexchange channels as described in 2.3. In all cases, one four-wire channel connection is required per PDSS to SCU access line. (See 2.9.4(A)(3), following.)

(7) Access to each remote station from the DSS (PDSS or SDSS as applicable) is obtained through a Type 342 or 343 local channel, and through the appropriate channel connection. See 2.9.4(A)(3) or (B)(3).

(8) Access to each SDSS in a different serving office from the PDSS will require voice grade interoffice and/or interexchange channels as described in 2.3. In all cases, a four-wire channel connection will also be required at the PDSS and the SDSS. See 2.9.4(A)(3) and (B)(3).

(9) Upon application for service the customer shall specify the serving office location of the DSSs. When interoffice and/or interexchange channels are required, charges are determined between the PDSS and each SDSS.

(10) Dual channel access from the PDSS to the SCU is obtained through a second Type 343 channel. A PDSS located outside of the serving office area where the SCU is located will require, additionally, voice grade interoffice and/or interexchange channels as described in 2.3.

(B) SAS Service is not designed for alternate voice-data transmission and such transmission is not supported. DC continuity between the master and remote stations is not provided. Additionally, extension stations and additional points of termination are not provided with SAS Service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 51

SERVICES AND RATES

2. Description of Services (Continued)

2.9 DATAPHONE Select-A-Station (SAS) Service (Continued)

2.9.4 Rates

Monthly Service Rates Charge USOC

(A) PDSS

(1) Sequential arrangement - Common equipment ...... $ 155.90 $0.00 DSG - Dual channel option common equipment ...... 46.00 0.00 DUQ

(2) Addressable arrangement - common equipment ...... 194.90 0.00 D7S - Dual channel option common equipment ...... 95.50 0.00 DUR

(3) Channel connections - Per two-wire channel connected to the PDSS . . . 5.05 0.00 DSK

- Per four-wire channel connected to the PDSS . . . 17.50 0.00 DSP

(B) SDSS

(1) Sequential arrangement - Common equipment ...... 155.90 0.00 DSQ

(2) Addressable arrangement - Common equipment ...... 194.90 0.00 D7Y

(3) Channel connections - Per two-wire channel connected to the SDSS . . . 5.05 0.00 DSR

- Per four-wire channel connected to the SDSS . . . 17.50 0.00 DSZ

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 52

SERVICES AND RATES

2. Description of Services (Continued)

2.10 Served Direct Service

2.10.1 Regulations

(A) This offering is for specified two-point intraexchange channel types between different buildings on different premises which do not route through a serving office.

(B) Served Direct Channel charges apply:

(1) When it is the economic decision of Centel to provide served direct facilities. {1}

(2) When there is a minimum billing of fifteen (15) channels per each two-point configuration.

(3) When the maximum airline distance between the two premises is one mile or less.

(C) A customer may request this service offering when it is not the economic decision of Centel; however, in such cases, special construction charges as specified in Section 1, 4.4 shall apply in addition to the rates and charges found in this section.

Where a customer requests a quotation for special construction charges associated with Served Direct Service and then elects not to subscribe to the service, a quotation charge for developing the charges shall apply. This charge will include all developmental hours associated with the design and preparation of an individual request.

(D) Termination liability contracts (where applicable) in a customer-initiated request for Served Direct Service would be equal to the costs incurred for rearrangements of existing facilities and/or construction of new facilities as appropriate, less net salvage. Installed cost includes any expense associated with this particular case.

(E) The service is limited to intraexchange channels but can involve Served Direct Service between two separate serving office areas.

{1} A basic termination liability contract may be applicable in this case if Centel determines the facilities are not reusable.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 53

SERVICES AND RATES

2. Description of Services (Continued)

2.10 Served Direct Service

2.10.2 Rates

Between Different Monthly Rate Service Buildings on First Add'l Charge Class of Different Premises 1/10 Mile 1/10 Mile {1} USOC Service

Type 101 . . . . . $ 8.55 $ 1.40 $ 87.30 1LMCQ {2} RMC1L Type 315 . . . . . 8.55 0.00 87.30 1LLBQ EXCHANGE 0.00 1.40 0.00 1LLJQ EXCHANGE Type 423 . . . . . 8.55 1.40 87.30 1LMGQ {3} PVLFL Type 428 . . . . . 8.55 1.40 87.30 1LMKQ {4} PVLLL

{1} Charge applies per point of termination. {2} Obsolete USOC (1L3QQ). {3} Obsolete USOCs (1LLUQ) (1LPJQ) (1LLSQ). {4} Obsolete USOCs (1LVBQ) (1LVBQ) (1LVJQ).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 54 Cancels Original Sheet 54

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling

2.11.1 Signaling options per point of termination for the capability to accommodate manual signaling on private line service using 420, 422, 423, 425, 428 and 435 type services. (2)

Monthly Service Class of Rate Charge(1) USOC Service (A) Interexchange Manual $35.85 $58.20 J1B PVL+S Automatic 37.85 58.20 J1B PVL+S

(B) Intraexchange

(1) With interoffice channel Manual 15.05 29.10 J1B PVL+L Automatic 13.75 29.10 J1A PVL+L ( I )

(2) Without interoffice channel Manual 7.70 29.10 J1BWO PVL+L ( I ) Automatic 7.50 29.10 J1AWO PVL+L

2.11.2 Regulations

(A) The Type A, B and C loop signaling arrangements for station ports of a premises PBX (or similar) switching system and the E&M signaling arrangement for tie lines are furnished for grandfathered and registered PBXs per Part 68 of the FCC regulations.

(B) For connections to registered PBX (or similar) equipment, the customer must specify the equipment capability of their registered equipment.

(C) Customers with grandfathered customer-provided PBX (or similar) equipment may, at their option:

(1) Continue to provide their own off-premises station signaling capability and use only the type 428 channel.

(2) Request that off-premises station signaling capability be provided by Centel. Where this option is selected, the customer must specify his or her equipment signaling capability.

(D) Based on information provided by the customer, Centel will furnish the appropriate signaling arrangement. Where the requested signaling arrangement is furnished and determined to be of lesser signaling range than required, and the customer requests Centel to furnish another signaling arrangement, such request will be treated as a new request for service and appropriate service charges will apply.

(1) A move charge on the same premises is one-half of the full service charge. (2) Signaling options for types 420 and 422 are obsolete - Existing installations at existing locations for existing customers. Automatic signaling is not available for multipoint services.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 55 Cancels Original Sheet 55

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling

2.11.3 Signaling options per point of termination limited to two-point service only, for the capability to accommodate signaling on private line service using Type 400 Local Channel indicated below.

Service Class Monthly Charge of Rate (1) USOC Service (A) Interexchange

(1) E & M type signaling

Type 420 (2) $28.10 $ 58.20 SLM20 PVLCS Type 422 (2) 39.35 58.20 SLM22 PVLES Type 423 (2) 29.25 58.20 SLM23 PVLFS Type 424 17.50 58.20 SLM24 PVLGS ( I ) Type 425 (2) 38.55 58.20 SLM25 PVLHS Type 428 28.80 58.20 SLM28 PVLLS Type 435 (2) 31.55 58.20 SLM35 PVL5S

(2) Loop signaling capable of operation over loops with resistance of 900 ohms or more (2)

Type 420 46.00 58.20 SLL20 PVLCS Type 422 46.00 58.20 SLL22 PVLES Type 423 48.30 58.20 SLL23 PVLFS Type 435 46.00 58.20 SLL35 PVL5S

(3) Loop signaling capable of operation over loops with resistance of less than 900 ohms (2)

Type 420 47.95 58.20 SLLC0 PVLCS Type 422 47.95 58.20 SLLC2 PVLES Type 423 49.90 58.20 SLLC3 PVLFS Type 435 47.95 58.20 SLLC5 PVL5S

(1) A move charge on the same premises is one-half the full service charge. (2) Obsolete - Existing installations at existing locations for existing customers.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 56

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling (Continued)

2.11.1 (Continued)

Service Class Monthly Charge of Rate {1} USOC Service

(A) Interexchange (Continued)

(4) Loop signaling options per local channel on Type 428 when associated with station ports of a premises switching system.

- Type A capable of operation over loops with resistance in the range of 0-199 ohms ...... $ 10.60 $ 58.20 SALAS PVLLS

- Type B capable of operation over loops with resistance in the range of 200-899 ohms ...... 10.60 58.20 SAUBS PVLLS

- Type C capable of operation over loops with resistance in the range of 900 ohms or more ...... 10.60 58.20 SAYCS PVLLS

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 57

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling

2.11.3 (Continued)

Service Class Monthly Charge of Rate {1} USOC Service

(B) Intraexchange

(1) With interoffice channel

(a) Type 420 {2} . . . $ 16.95 $ 29.10 SLM20 PVLCL Type 422 {2} . . . 16.95 29.10 SLM22 PVLEL Type 423 {2} . . . 11.30 29.10 SLM23 PVLFL Type 424 . . . . . 5.60 29.10 SLM24 PVLGL Type 425 {2} . . . 16.30 29.10 SLM25 PVLHL Type 428 . . . . . 16.30 29.10 SLM28 PVLLL Type 435 {2} . . . 16.95 29.10 SLM35 PVL5L

(b) Loop signaling capable of operation over loops with resistance of 900 ohms or more {2}

Type 420 . . . . . 21.50 29.10 SLL20 PVLCL Type 422 . . . . . 21.50 29.10 SLL22 PVLEL Type 423 . . . . . 8.55 29.10 SLL23 PVLFL Type 435 . . . . . 29.50 29.10 SLL35 PVL5L

(c) Loop signaling capable of operation over loops with resistance of less than 900 ohms {2}

Type 420 . . . . . 23.00 29.10 SLLC0 PVLCL Type 422 . . . . . 22.60 29.10 SLLC2 PVLEL Type 423 . . . . . 11.30 29.10 SLLC3 PVLFL Type 435 . . . . . 33.95 29.10 SLLC5 PVL5L

{1} A move charge on the same premises is one-half the full service charge. {2} Obsolete - Existing installations at existing locations for existing customers.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 58

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling (Continued)

2.11.3 (Continued)

Service Class Monthly Charge of Rate {1} USOC Service

(B) Intraexchange (Continued)

(1) With interoffice channel (Continued)

(d) Loop signaling options per local channel on Type 428 when associated with station ports of a premises switching system.

- Type A capable of operation over loops with resistance in the range of 0-199 ohms . . . . $ 2.65 $ 29.10 SALAW PVLLL

- Type B capable of operation over loops with resistance in the range of 200-899 ohms . . . 2.65 29.10 SAUBW PVLLL

- Type C capable of operation over loops with resistance in the range of 900 ohms or more . . . 2.65 29.10 SAYCW PVLLL

The DC resistance specification does not imply a guarantee of end to end DC continuity. The customer can expect to be provided a loop meeting the same limits as the normal central office loop, i.e., not exceeding 1300 ohms, exclusive of 200 ohm maximum terminal equipment resistance.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 First Revised Sheet 59 Cancels Original Sheet 59

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling (Continued)

2.11.3 Signaling options per point of termination … (Continued) (T)

Service Class Monthly Charge of Rate (1) USOC Service

(B) Intraexchange (Continued)

(2) Without interoffice channel

(a) Type 420 (2) $6.85 $29.10 SLMWO PVLCL Type 422 (2) 6.85 29.10 SLMW2 PVLEL Type 423 (2) 6.85 29.10 SLMW3 PVLFL Type 424 5.60 29.10 SLMW4 PVLGL Type 425 (2) 6.85 29.10 SLMW5 PVLHL Type 428 6.85 29.10 SLMW8 PVLLL Type 435 (2) 6.85 29.10 SLMW6 PVL5L

(b) Loop signaling capable of operation over loops with resistance of 900 ohms or more (2)

Type 420 8.05 29.10 SLLW0 PVLCL Type 422 6.55 29.10 SLLW2 PVLEL Type 423 5.80 29.10 SLLW3 PVLFL Type 435 8.05 29.10 SLLW6 PVL5L

(c) Loop signaling capable of operation over loops with resistance of less than 900 ohms (2)

Type 420 8.75 29.10 SLLA0 PVLCL Type 422 8.75 29.10 SLLA2 PVLEL Type 423 9.95 29.10 SLLA3 PVLFL ( I ) Type 435 8.75 29.10 SLLA5 PVL5L

(1) A move charge on the same premises is one-half the full service charge. (2) Obsolete - Existing installations at existing locations for existing customers.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 60

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling (Continued)

2.11.3 (Continued)

Service Class Monthly Charge of Rate {1} USOC Service

(B) Intraexchange (Continued)

(2) Without interoffice channel (Continued)

(d) Loop signaling options per local channel on Type 428 when associated with station ports of a premises switching system.

- Type A capable of operation over loops with resistance in the range of 0-199 ohms . . . . $ 2.65 $ 29.10 SALAL PVLLL

- Type B capable of operation over loops with resistance in the range of 200-899 ohms . . . 2.65 29.10 SAUBL PVLLL

- Type C capable of operation over loops with resistance in the range of 900 ohms or more . . . 2.65 29.10 SAYCL PVLLL

The DC resistance specification does not imply a guarantee of end to end DC continuity. The customer can expect to be provided a loop meeting the same limits as the normal central office loop, i.e., not exceeding 1300 ohms, exclusive of 200 ohm maximum terminal equipment resistance.

{1} A move charge on the same premises is one-half the full service charge.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 61

SERVICES AND RATES

2. Description of Services (Continued)

2.11 Signaling (Continued)

2.11.3 (Continued)

Service Class Monthly Charge of Rate {1} USOC Service

(B) Intraexchange (Continued)

(3) Service between premises not more than one mile apart (Served Direct Service)

(a) Loop signaling options per local channel on Type 428 when associated with station ports of a premises switching system.

- Type A capable of operation over loops with resistance in the range of 0-199 ohms . . . . $ 0.45 $ 29.10 SALAM PVLLL

- Type B capable of operation over loops with resistance in the range of 200-899 ohms . . . 0.45 29.10 SAUBM PVLLL

- Type C capable of operation over loops with resistance in the range of 900 ohms or more . . . 0.45 29.10 SAYCM PVLLL

The DC resistance specification does not imply a guarantee of end to end DC continuity. The customer can expect to be provided a loop meeting the same limits as the normal central office loop, i.e., not exceeding 1300 ohms, exclusive of 200 ohm maximum terminal equipment resistance.

{1} A move charge on the same premises is one-half the full service charge.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 62

SERVICES AND RATES

2. Description of Services (Continued)

2.12 Joint User Service

Monthly Rate USOC

For each joint user on a private line service, per month ...... $ 22.10 JNS

2.13 Alternate Use Arrangements

2.13.1 Voice Grade Services

(A) Channels furnished by Centel in connection with voice grade service may be used on an alternate basis with other voice grade services and subvoice grade services. The monthly charge for local channels, interoffice channels and interexchange channels will be the higher of the two uses. Only one type of operation can be used at one time.

(B) Alternate use charges

Monthly Service Rate Charge USOC

(1) With channels for remote metering, supervisory control, and miscellaneous signaling purposes.

- Channel termination, per station including switching key ...... $ 1.90 $ 5.50 3AM

- Includes connection of customer-provided punched-card equipment, per station (includes one switching key) . . . . . 37.40 27.30 TYM

(2) For data transmission up to 150 baud per data transmission station connected for alternate use. Includes key to transfer between the telephone termination and the data termination ...... 37.40 27.30 37R {1}

{1} Additional USOC (GHH).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 63

SERVICES AND RATES

2. Description of Services (Continued)

2.13 Alternate Use Arrangements (Continued)

2.13.1 Voice Grade Services (Continued)

(B) Alternate use charges (Continued)

Monthly Service Rate Charge USOC

(3) For data transmission over 150 baud, the alternate voice use feature (DMJ) is required with appropriate common equipment.

(4) With foreign exchange service. The foreign exchange operation is furnished only on a two- point basis.

- A voice grade local channel in addition to those already furnished (See 2.3, preceding)

- Alternate switching - To go from foreign exchange operation to voice grade operation and from voice grade operation to foreign exchange operation, apply at each of the two service points arranged for arranged use ...... $ 11.20 $ 14.55 36B

2.13.2 Subvoice Grade Services

(A) Alternate use charges (includes a switching key)

Monthly Service Rate Charge USOC

Each station equipped ...... $ 2.25 $ 7.00 TYX {1}

Where use includes use of punched-card equipment per station ...... 44.90 0.00 TYU {2}

Special charges apply for additional facilities required for alternate use to more than two points.

{1} Additional USOCs (TYO) (TYW). {2} Additional USOCs (TYM) (TYK).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 64

SERVICES AND RATES

2. Description of Services (Continued)

2.14 Reserved for Future Use

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 2 Original Sheet 65

SERVICES AND RATES

2. Description of Services (Continued)

2.15 Network Reconfiguration Service (NRS)

2.15.1 Type 420, 422, 423, 424, 425 and 435 services in this tariff may be terminated into a customer's Network Reconfiguration Service (NRS) channel port for the customer to reconfigure portions of his or her dedicated services network. Rates and regulations for NRS can be found in Section 8 of the Digital Link Services Tariff.

2.15.2 When service from this tariff is included in a customer's NRS grid, only services jurisdictionally the same may be cross-connected. A customer may not connect an intraexchange private line service to an interexchange private line service. All jurisdictionally intraexchange private line services may be changed to interexchange service at the time of retermination into the NRS system and only one service charge will apply per circuit.

2.15.3 All services terminated into the NRS grid must also be those of the same customer ordering the NRS service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 3

Original Sheet 1

RESERVED FOR FUTURE USE

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 1 LOCAL ACCESS AND TRANSPORT AREAS 1. General Local Access and Transport Areas (LATAs) denote geographic areas established for the provision and administration of communications service. LATAS encompass one or more designated exchanges, which are grouped to serve common social, economic and other purposes. 2. List of Local Access and Transport Areas (LATAS) 2.1 ABILENE LATA (550) ABILENE HERMLEIGH SNYDER ALBANY ROBY STAMFORD ANSON ROSCO SWEETWATER COLORADO CITY ROTAN WESTBROOK HAMLIN ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Baird Loraine Noodle Blackwell Lueders Nubia Buffalo Gap Maryneal Potosi Clyde McCaulley Putnam Gail Merkel Sylvester Hamby Moran Trent Hawley Nolan Tuscola Lawn 2.2 AMARILLO LATA (546) ALLISON CANYON McLEAN AMARILLO GRUVER PAMPA BORGER HEREFORD SHAMROCK CANADIAN LEFORS SKELLYTOWN STINNETT ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Adams, Okla. Dimmitt Guymon, Okla. Adrian Dodson Happy Balko, Okla. Dumas Hardesty, Okla. Beaver, Okla. East Glenrio Hart Boise City, Okla. Estelline Hartley Bovina Eva, Okla. Hedley Booker Farwell Higgins Boys Ranch Felt-Wheeless, Okla. Hooker, Okla. Bryan's Corner, Okla. Flomot Hub Bunkerhill Floris, Okla. Kenton, Okla. Cactus Follett Kerrick Channing Forgan, Okla. Keyes, Okla. Clarendon Frio Lakeview Claude Friona Lautz Cleta Fritch Logan, Okla. Coldwater Goodnight Memphis Dalhart Goodwell, Okla. Miami Darrouzett Griggs, Okla. Middlewater Dawn Groom Milo Center Gurley Mobeetie

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 2 LOCAL ACCESS AND TRANSPORT AREAS 2. List of Local Access and Transport Areas (LATAS) (Continued) 2.2 AMARILLO LATA (556) (Continued) ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES (Continued) Nazareth Spearman Turpin, Okla. Oklahoma Lane Stevens Tyrone, Okla. Panhandle Stratford Umbarger Parmer Summerfield Vega Perryton Sunray Wellington Pleasant Hill Texhoma, Okla. Westway Quitaque Texline Wheeler Sanford Tharp White Deer Silverton Turkey Wildorado South Texhoma 2.3 AUSTIN LATA (558) ADAMSVILLE LAMPASAS ROCKDALE AUSTIN LIBERTY HILL SMITHVILLE BASTROP LOCKHART TAYLOR ELGIN ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Bertram Georgetown McDade Briggs Granger Milano Buchanan Dam Hutto Paige Buda Jarrel Rocky Creek Burnet Kempner San Gabriel Coupland Kyle San Marcos Dale Lometa Thorndale-Thrall Dripping Springs Lytton Spring Wimberley Fentress Martindale 2.4 BEAUMONT LATA (562) BEAUMONT KOUNTZE SOUR LAKE BRIDGE CITY LaBELLE SOUTH VIDOR BUNA LUMBERTON SPURGER CHINA MAURICEVILLE VIDOR DEWEYVILLE NEDERLAND-PORT NECHES WARREN EVADALE ORANGE WESTBURY FANNETT PORT ARTHUR WILDWOOD JASPER SABINE PASS WOODVILLE KIRBYVILLE SILSBEE ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Anahuac Fairmount Newton Bon Wier Hamshire Nome Bronson Hankamer Pineland Burkeville Hemphill Smith Point Colmesneil High Island Wallisville Double Bayou Milam Winnie

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 3

LOCAL ACCESS AND TRANSPORT AREAS

2. List of Local Access and Transport Areas (LATAS) (Continued)

2.5 BROWNSVILLE LATA (568)

ALAMO-PHARR-SAN JUAN HARLINGEN PORT ISABEL BROWNSVILLE LOS FRESNOS RIO HONDO DONNA MCALLEN SAN BENITO EDCOUCH MERCEDES SULLIVAN CITY EDINBURG MISSION ZAPATA FALCON HEIGHTS

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES

El Sauz McCook San Isidro Hargill Port Mansfield San Perlita La Feria Raymondville Santa Rosa Lasara Rio Grande City Stillman Lyford Roma Weslaco

2.6 CORPUS CHRISTI LATA (564)

ALICE FREER ROCKPORT BAYSIDE GOLIAD SAN DIEGO BEEVILLE HALLETTSVILLE SHINER BENAVIDES HEBRONVILLE SINTON BRUNI KINGSVILLE SKIDMORE CORPUS CHRISTI MATHIS VICTORIA CUERO MOULTON WOODSBORO EDNA NORDHEIM YOAKUM FLATONIA REFUGIO YORKTOWN

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES

Agua Dulce La Ward Portland-Gregory Annarose Lolita Premont Aransas Pass Loyola Beach Riviera Berclair Mirando City Robstown Bishop Odem Sarita Blessing Orange Grove Seadrift Bloomington Palacios Taft Charco Pawnee Three Rivers Concepcion Pettus Tilden Encino Point Comfort Tivoli Falfurrias Port Alto Vanderbilt Ganado Port Aransas Waelder George West Port Lavaca Westoff Ingleside Port O'Connor

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 4

LOCAL ACCESS AND TRANSPORT AREAS 2. List of Local Access and Transport Areas (LATAS) (Continued) 2.7 DALLAS LATA (552) ALLEN ENNIS MINERAL WELLS ALVARADO FARMERSVILLE PARIS ANNA FORNEY POTTSBORO AUBREY FRISCO PRINCETON BRECKENRIDGE FT. WORTH PROSPER CELINA GAINESVILLE RANGER CISCO GORDON RED OAK CLEBURNE GRANBURY ROCKWALL COMBINE GREENVILLE ROYSE CITY CORSICANA HONEY GROVE STRAWN CRANDALL ITALY TERRELL DALLAS JEWETT WAXAHACHIE DENISON LADONIA WEATHERFORD EASTLAND MCKINNEY WILLS POINT EDGEWOOD MIDLOTHIAN WOLFE CITY ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Acton Carrollton Frost Alba Cash Garland Alexander Cayuga Gatesville Alvord Celeste Glen Rose Argyle Centerville Godley Athens Chandler Gordonville Avalon Chico Gorman Azle Collinsville Graford Bagwell Commerce Grand Saline Bardwell Como Grandview Bartonville Cooper Grapevine Bell-Savoy Covington Gunter Ben Franklin Cresson Hamilton Ben Wheeler Cross Plains Hico Birthright Cumby Howe Blooming Grove Dallas/ Irving Blossom Ft. Worth Airport Jackson Blue Ridge De Leon Jonesboro (Collin Co.) Decatur Joplin Bluffdale Denton Josephine Blum Deport Justin Bogota Desdemona Kaufman Bonham Detroit Keller Boonsville Dorchester Kemp Boyd Dublin Kerens Brashear Ector Koon Kreek Bridgeport Elkhart Kopperl Bristol Emhouse Krum Brownsboro Emory Lake Dallas Buffalo (Leon Co.) Eustace Lake Palestine East Bullard Evant Lakeside Village Caddo Mills Fairfield Leona Campbell Ferris Leonard Canton Flat Lewisville Carbon Forestburg Lipan Carlton Frankston Lone Oak

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 5

LOCAL ACCESS AND TRANSPORT AREAS

2. List of Local Access and Transport Areas (LATAS) (Continued)

2.7 DALLAS LATA (552) (Continued)

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES (Continued)

Mabank Pickton Slocum Malakoff Pilot Point Springtown Marquez Plano Stephenville Martin Mills Point Streetman May Ponder Sulphur Springs Maypearl Possom Kingdom Lake Sunset Merit Pottsville Tawakoni Milford Proctor Telephone Miller Grove Purdon Tennessee Colony Millsap Quinlan Tioga Montalba Reno Tolar Morgan Rhome Tom Bean Muenster Rice Tool-Seven Points Murchison Richland Trenton Myra Rio Vista Trinidad Myrtle Springs Rising Star Troup Neches Roane Tucker Negley Rosser Valley View Nevada Rosston Valley View East Oakland Rowlett Van Alstyne Oakwood Roxton Venus Olden Runaway Bay Walnut Springs Palestine Saint Jo Weaver Palmer Sanger Whitesboro Palo Pinto Santo Whitewright Paluxy Scurry Wilmer Paradise Sherley Windom Payne Springs Sherman Wylie Pecan Gap Sidney Yantis Perrin Slidell

2.8 EL PASO LATA (540)

ANTHONY CLINT EL PASO CANUTILLO

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES

Dell City Fort Hancock Queen, N.M. Desert Haven Guadalupe Peak Timberon, N. M. Fabens Mile High

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 6 LOCAL ACCESS AND TRANSPORT AREAS 2. List of Local Access and Transport Areas (LATAS) (Continued) 2.9 HEARNE LATA (Includes Associated Bryan Market Area Local Exchange Company Exchanges) (570) CALVERT HEARNE ASSOCIATED BRYAN MARKET AREA LOCAL EXCHANGE COMPANY EXCHANGES Borden Giddings Northrup Bryan High Hill Plum Caldwell Hostyn Schulenburg Deanville Kurten Snook-Tunis Dime Box La Grange Somerville Fayetteville Lexington Warrenton Franklin Moravia Weimar 2.10 HOUSTON LATA (560) ALVIN EL CAMPO PRAIRIE VIEW ANGLETON FREEPORT RICHMOND-ROSENBERG BAY CITY GALVESTON SAN AUGUSTINE BELLVILLE GARWOOD SEALY BRENHAM HEMPSTEAD SMITHERS LAKE CENTER HOUSTON SPLENDORA CHIRENO HUNTSVILLE SPRING CLEVELAND LIBERTY TEXAS CITY-LA MARQUE CLUTE-LAKE JACKSON LIVERPOOL TIMPSON COLUMBUS MADISONVILLE TOMBALL CORRIGAN MATAGORDA VALLEY LODGE CYPRESS NACOGDOCHES WALLER DAYTON PINEHURST WHARTON EAGLE LAKE PORT BOLIVAR ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Alto Chester Groveton Anderson Coldsprings Hardin Apple Springs Conroe Highlands Arcola Crockett Hilltop Lakes Austonio Crosby Hitchcock-Santa Fe Bacliff Cushing Hudson Batson Cut N" Shoot (Conroe) (Angelina Co.) Baytown Damon Huffman Beach City Devers Hull Beasley Dibol Humble Bedias Dickinson Huntington Blanchard Etoile Huxley Boling-New Gulf Evergreen Industry Brazoria-Churchill Fuller Springs Iola Broaddus Garrison Joaquin Brookshire Glen Flora Katy Burton Goodrich Kemah Carmine Grangerland (Conroe) Kennard Centra Grapeland

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 7 LOCAL ACCESS AND TRANSPORT AREAS 2. List of Local access and Transport Areas (LATAS) (Continued) 2.10 HOUSTON LATA (560) (Continued) ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES (Continued) Lake Conroe (Conroe) Normagee Segno League City North Zulch Shepherd Livingston Oakhurst Shiro Louise Old Ocean Stafford Lovelady Onalaska Sugar Land Lufkin Pennington Sweeny Markham Plantersville Teneha Memorial Point Porter Trinity Montgomery Porter Heights Waldon (Montgomery) (Montgomery Co.) Raywood Wallis Mont Belvieu Reklaw Washington Nassau Bay Richards Waterwood Navasota River Brook Wells Needville (Conroe) West Columbia New Ulm Rosharon Willis New Waverly Ruby Zavalla Normagee Saratoga 2.11 LONGVIEW LATA (554) ATLANTA LONGVIEW OMAHA CARTHAGE MARSHALL OWENTOWN DEADWOOD MINEOLA PITTSBURG JEFFERSON MT. PLEASANT TYLER LINDALE-SWAN ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Annona Harleton Overton Arp Hawkins Pine Acres Avery Henderson Pine Hill Avinger Hooks Pine Mills Beckville Hudson Price Bettie (Cherokee Co.) Pritchett Big Sandy Hughes Springs Quitman Bloomburg Jacksonville Red Springs Clarksville Jim Hogg (Smith Co.) Cypress Springs Karnack Redwater Daingerfield Kilgore Rosewood De Berry Laneville Rusk Dekalb Linden Sandy Creek Doddridge, Ark. Lone Star Simms Douglasville Marietta Talco Dry Creek Maud Tatum Elysian Fields Maydelle Texarkana Fouke, Ark. Mims Texarkana, Ark. Garland, Ark. Minden Trigg, Ark. Gary Mount Enterprise Turnertown Gilmer Mount Vernon Uncertain Gladebranch Naples Van Gladewater New Boston Waskom Golden New London Whitehouse Good Springs New Summerfield Winfield Hallsville Oak Hill Winnsboro Ore City Wynne

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 8

LOCAL ACCESS AND TRANSPORT AREAS

2. List of Local Access and Transport Areas (LATAS) (Continued)

2.12 LUBBOCK LATA (544)

FLOYDADA LOCKNEY PLAINVIEW HALE CENTER LUBBOCK SLATON

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES

Abernathy Hollandville Plains Acuff Hurlwood Post Afton Idalou Punkin Center Amherst Jayton Ralls Anton Kress Ransom Canyon Arnett Lamesa Redmon Aten Lariat Roaring Springs Ausborne Lazbuddie Ropesville Bean Lehman Seagraves Brownfield Levelland Shallowater Bula Littlefield Smyer Caprock Loop Southland Cone Lorenzo Spade Cotton Center Maple Springlake County Line Matador Spur Crosbyton McAdoo Sudan Denver City Meadow Sundown Dickens Merrell Tahoka Dry Lake Morton Tulis Earth Muleshoe Union Edmondson Needmore Verbena Elkins Nelms Vigo Park Fieldton New Home West Lakes Fletcher Carter O'Donnell Wheatley Girard Olten White Face Hackmont Paducah White River Halfway Patricia Whitharral Happy Union Peacock Wilson Hatch Petersburg Wolfforth Higginbotham Pettit Woodrow

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 9 LOCAL ACCESS AND TRANSPORT AREAS 2. List of Local Access and Transport Areas (LATAS) (Continued) 2.13 MIDLAND LATA (542) ALPINE KERMIT ODESSA BIG SPRING MARATHON PYOTE CRANE MARFA RANKIN FORT DAVIS McCAMEY SEMINOLE FORT STOCKTON MIDKIFF STANTON GOLDSMITH MIDLAND TERMINAL GRANDFALLS MONAHANS WINK IRAAN ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES Ackerly Heath Canyon Saint Lawrence Alamito Imperial Sand Springs Andrews Lajitas Sanderson Balmorhea Langtry Sheffield Big Bend Natl' Park Lenorah Sierra Blanca Big Canyon Lomax Six Shooter Calamity Creek Luther Terlinqua Coahoma Mentone Toyah Comstock Orla Valentine Coyanosa Pecos Van Horn Forsan Presidio Vincent Frankel City Redford West Stanton Garden City 2.14 SAN ANGELO MARKET AREA LOCAL EXCHANGE COMPANY EXCHANGES (Not Associated With Any Lata) (961) Ballinger Goldthwaite Paint Rock Bangs Gustine Pontotoc Barnhart Junction Priddy Bend Katemcy Richland Springs Big Lake Kingsland Robert Lee Big Valley Lake Brownwood Rochelle Blanket Lake Coleman Rockwood Bradshaw Llano Rowena Brady Locker San Angelo Bronte Lohn San Saba Brownwood London Santa Anna Burkett Mason Sonora Carlsbad Melvin Star Cherokee Menard Sterling City Christoval Mercury Streeter Coleman Mertzon Tow Comanche Miles Valera Crews Mozelle Voca Doole Mullen Water Valley Eden Newburg Wingate Eldorado Norton Winters Eola Ozona Zephyr Fredonia

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 10

LOCAL ACCESS AND TRANSPORT AREAS

2. List of Local Access and Transport Areas (LATAS) (Continued)

2.15 SAN ANTONIO LATA (566)

ASHERTON DEVINE MARION BANDERA EAGLE PASS MEDINA LAKE BATESVILLE ENCINAL NEW BRAUNFELS BIG WELLS HONDO PEARSALL BRACKETTVILLE KARNES CITY- PIPE CREEK CAMBELLTON FALLS CITY PLEASANTON CARRIZO SPRINGS KENEDY POTEET CASTROVILLE La COSTE RUNGE CATARINA La PRYOR SABINAL CHRISTINE LAREDO SAN ANTONIO COTULLA LULING SEGUIN CRYSTAL CITY LYTLE UVALDE

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES

Artesia Wells Garven Store Mountain Home Balcones Gillett Nixon Barksdale Gonzales Poth Blanco Granite Shoals Rocksprings Boerne Hancock Round Mountain Bulverde Harper Sabina Camp Wood Hunt San Miguel Center Point Ingram Sattler Charlotte Johnson City Saturn Comfort Jourdanton Sisterdale Cost Kenberg Smiley Cranes Mill Kerrville Smithson's Valley D'Hanis Kingsbury Somerset Del Rio Knippa Stockdate Dilley Kosciusko Stonewall Doss Lavernia Sutherland Springs Floresville Leesville Tarpley Fowlerton Marble Falls Utopia Fredericksburg Medina Vinegarron Frio Canyon Millett Willow City

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 4 Original Sheet 11

LOCAL ACCESS AND TRANSPORT AREAS

2. List of Local Access and Transport Areas (LATAS) (Continued)

2.16 WACO LATA (556)

BARTLETT MARLIN TEAGUE BELTON MERIDAN TEMPLE CAMERON MEXIA TROY HILLSBORO OGLESBY WACO ITASCA REAGAN WORTHAM

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES

Ben Hur Fort Hood Nolanville Brandon Groesbeck Oenaville Bremond Heidenheimer Prairie Hill Buckholts Holland Reisel Burlington Hubbard Rogers Bynum Iredell Rosebud Chilton Irene Salado Clifton Killeen Sandy Coolidge Kosse Tehuacaha Copperas Cove Laguna Park Thornton Cranfills Gap Little River Turnersville Crawford Lott Valley Mills Dawson Malone Whitney Donie Moffat Zabcikville Florence Mount Calm

2.17 WICHITA FALLS LATA (548)

BELLEVUE CHILLICOTHE JACKSBORO BOWIE GRAHAM QUANAH BURKBURNETT HENRIETTA VERNON CHILDRESS IOWA PARK WICHITA FALLS

ASSOCIATED LOCAL EXCHANGE COMPANY EXCHANGES

Archer City Jermyn Oklaunion Aspermont Joy Olney Benjamin Kamay Orth Blue Grove Kirkland Petrolia Bonita Knox City Ringgold Bryson Lake Arrowhead Rochester Byers Lake Kemp Rule Cee Vee Lake Kickapoo Scotland Charlie Loving Seymour Crowell Medicine Mound Spanish Fort Elbert Megargel Thalia Electra Montague Throckmorton Eliasville Munday Truscott Goodlett Newcastle Weinert Haskell Nocona Windthorst Holliday Odell Woodson

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 5 First Revised Sheet 1 Cancels Original Sheet 1

INTEREXCHANGE 911 SERVICE

1. Description of Service

1.1 Interexchange Channels for 911 Service - Interexchange private lines that are used solely for the provision of Universal Emergency Number (911) Service or Private Switch 911 (PS 911) Service.

2. Application of Service (1)

2.1 This service applies under the following conditions:

(a) When interexchange channels are required between a serving office and a Public Safety Answering Point (PSAP).

(b) When interexchange channels are required between a serving office and a 911 tandem or access tandem that performs a concentration function.

(c) When interexchange channels are required between a serving office and a 911 tandem or access tandem that performs a concentration function.

(d) When interexchange channels are required between an access tandem that provides a concentration function and a 911 tandem.

(e) When interexchange channels are required between a PSAP and a Data Management System (DMS) node or DMS computer.

(f) When interexchange channels are required between a private switch and a 911 tandem or between a private switch and a PSAP for the purpose of providing PS 911 Service.

3. Rates - Interexchange Channels for 911 Service

3.1 In-service 911 customers and 911 customers who have placed firm orders as of the effective date of this tariff may continue with their executed contractual agreements. (2)

Monthly Nonrecurring Class of Rate Charge USOC Service

3.2 Interexchange channel, each $49.00 $165.00 N9N1X PVCVS ( I )

(1) For Centel's provision of 911 Service, please see Section 22 of Centel's General Customer Services Tariff. For Centel's provision of Private Switch 911 Service please see Section 6 of this tariff.

(2) Customers cannot add to, cannot outside move and cannot supersede.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 6 Original Sheet 1

PRIVATE SWITCH 911 SERVICE

1. Description of Service

1.1 Private Switch 911 Service (PS 911) is a service offering which allows a Public Safety Answering Point (PSAP) to receive either (1) Automatic Number Identification (ANI) or (2) a combination of ANI and Automatic Location Identification (ALI) information on 911 calls originating from Direct Inward Dialing (DID) stations served by a private switch.

The ANI-only option is available if the 911 customer's system is equipped with the ANI feature and if the private switch is equipped to send properly formatted ANI information to the Local Exchange Carrier (LEC) on 911 calls.

The option which provides ANI and ALI is available if (1) the Private Switch Provider (PSP) arranges to provide and update number, name, and location information for each DID station served by the private switch in the format required for the LEC's data base; (2) the private switch sends ANI to the LEC on 911 calls; and (3) the PSAP is equipped to provide 911 service with the ALI feature.

1.2 Service availability is dependent upon the type and configuration of the 911 system in place for the service area. If the 911 system design uses a Control Office, then facilities are required between the private switch and the Control Office. If the 911 system design does not include a Control Office, then facilities are required between the private switch and the PSAP. Rates and charges for intraexchange facilities are provided in paragraph 5.1.2 of this tariff, while interexchange facilities are provided in Section 5 of Centel's Private Line Service Tariff.

1.3 The PS 911 customer may be a municipality, a council of governments, a communication district, or other state or local governmental unit, or an authorized agent of one or more municipalities or other state or local governmental units to whom authority has been lawfully delegated. The PS 911 customer must be legally authorized to subscribe to the service and have public safety responsibility to respond to telephone calls from the public for emergency police and fire service within the telephone central office areas arranged for 911 service calling.

1.4 The Private Switch Providers referred to in this tariff might include such organizations as: schools, nursing homes, hospitals, planned communities, shared tenant service (STS) providers, and residential multitenant service (RMTS) providers.

2. Explanation of Terms

Administrative Site: A location responsible for administration of private switch end user records associated with one or more private switches. This location has the computer hardware and software necessary to create and transmit private switch end user (PSEU) information to the LEC data base.

Automatic Location Identification (ALI): A feature by which the name and address associated with the calling party's telephone number (identified by the ANI feature) are forwarded to the PSAP for display.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 6 Original Sheet 2

PRIVATE SWITCH 911 SERVICE

2. Explanation of Terms (Continued)

Automatic Number Identification (ANI): A feature by which the calling party's telephone number is forwarded to the PSAP for display.

Central Office: A LEC switching system where telephone exchange service customer station loops are terminated for purposes of interconnection to each other and to trunks.

Control Office: The LEC central office providing tandem switching capabilities for 911 service calls from all end offices. It controls the switching of ANI information to a PSAP and also provides the Selective Routing service feature, Speed Calling features, Call Transfer services and certain maintenance functions for each PSAP.

Data Base: A system of manual procedures and computer programs used to create, store, and update the data required to provide the Selective Routing (SR) and ALI features.

Intraexchange Facilities: The facilities used to connect a private switch to a Control Office or a PSAP located within the same exchange area as defined within Centel's Local Exchange Tariff.

Interexchange Facilities: The facilities used to connect a private switch to a Control Office or a PSAP located in a different exchange area as defined within Centel's Local Exchange Tariff.

Local Exchange Carrier (LEC): A telecommunications utility which provides local exchange service.

911 Customer: The local governmental agency, or its authorized agent, that is legally authorized to subscribe to 911 service.

Private Switch (PS): A switch, such as a Private Branch Exchange (PBX), that provides wireline basic telephone service, but is not owned and operated by a LEC.

Private Switch End User (PSEU): An individual or organization authorized to use the telephone services provided by the private switch.

Private Switch Provider (PSP): A private entity that provides telephone service to a group of residential or business end users served by the provider's private switch (e.g., Private Branch Exchange).

Public Safety Answering Point (PSAP): The location where 911 calls are answered.

Record: A telephone number and the 911 data base information associated with that number.

3. Technical Specifications

3.1 Network interface requirements for PS 911 customer access are described in detail in the PS 911 Technical Interface Standards. A copy of the requirements can be obtained from the Advisory Commission on State Emergency Communications, 1101 Capital of Texas Highway South, Suite B100, Austin, Texas 78746 (512 327-1911).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 6 Original Sheet 3

PRIVATE SWITCH 911 SERVICE

4. Rules and Regulations

4.1 Application for Service

Requests for this service: (1) will only be accepted from a 911 customer; (2) must be provided to the LEC in writing; and (3) must identify service locations and arrangements.

4.2 Customer Obligations

A. The 911 customer is responsible for coordinating with the PSP so that the private switch provides full seven-digit Automatic Number Identification (ANI) according to the technical specifications established by the LEC. The private switch number information must be approved by the LEC prior to implementation to ensure that the service will function properly. PS 911 Service will not function properly if ANI is not in the proper format, if duplicate telephone numbers exist at the private switch, or if any telephone numbers assigned by the PSP are inconsistent with the LEC's numbering plan.

B. The 911 customer is responsible for coordinating with the PSP so that the PSP creates, maintains, and forwards to the LEC current telephone number and address data according to the format and procedures specified by the LEC.

C. The 911 customer is responsible for coordinating with the PSP so that the PSP develops and implements procedures to prevent the unauthorized or illegal use of PS 911 Service facilities. These dedicated facilities may not be used for any purpose other than for 911 service.

D. The 911 customer is responsible for coordinating with the PSP so that the PSP uses computer hardware and software for ongoing Private Switch End User (PSEU) record update programs and processes, that conform to the specifications outlined in the PS 911 Technical Interface Standards.

E. PS 911 Service information consisting of the name, address and telephone number of PSEUs is confidential. The 911 customer agrees to use such information only for the purpose of responding to emergency calls.

F. The PSEU forfeits the privacy afforded by nonlisted and nonpublished service to the extent that the telephone number, the address and name associated with the originating station location are furnished to the PSAP and to the LEC. The PSEU (published and nonpublished) consents to the storage and retention of PSEU name, telephone number, and address in the data base and also consents to access to this information by the PSAP for the sole purpose of responding to an emergency call.

G. The rates charged for PS 911 Service do not include, and the LEC does not undertake, inspection or constant monitoring to discover errors, defects and malfunctions in the service. The 911 customer has the responsibility for reporting all errors, defects and malfunctions to the LEC.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 6 Original Sheet 4

PRIVATE SWITCH 911 SERVICE

4. Rules and Regulations (Continued)

4.2 Customer Obligations (Contd')

H. Cancellation of the service in whole or in part by the 911 customer prior to establishment thereof, will require payment to the LEC of an amount equal to the cost of engineering, manufacturers' billings resulting from equipment orders, installation, assembly, labor, cost of removal and any other costs incurred by the LEC up to the time of cancellation resulting from the 911 customer's order for service, but not to exceed the total nonrecurring charges.

4.3 Liabilities

A. The LEC's entire liability to any person for interruption or failure of PS 911 Service shall be limited by the terms set forth in the Texas Health and Safety Code, Chapters 771 and 772, as amended, and the terms set forth in this section and other sections of this tariff. The LEC or its officers or employees, may not be held liable for any claim, damage, or loss arising from the provision of PS 911 Service unless it is proven that the act or omission proximately causing the claim, damage, or loss constitutes gross negligence, recklessness, or intentional misconduct on the part of the LEC.

B. PS 911 Service is provided solely for the benefit of the 911 customer; the provision of such service shall not be interpreted, construed or regarded as being for the benefit of, or creating any LEC obligation toward, or any right of action on behalf of, any third person or other legal entity.

C. Terminal equipment used in connection with PS 911 Service, whether such equipment is provided by the LEC or the 911 customer, shall be configured so that it is unable to extract any information from the data base other than as it relates to an emergency call. Any PSEU information obtained from the data base in connection with an emergency call shall be used solely for the purpose of answering, handling and responding to emergency calls in a manner consistent with the nature of the emergency. Any permanent record associating a PSEU's telephone number with his/her name or address shall be secured by the 911 customer and disposed of in a manner that will retain that security.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 6 Original Sheet 5

PRIVATE SWITCH 911 SERVICE

4. Rules and Regulations

4.3 Liabilities (Continued)

D. To the extent allowed by law, the 911 customer agrees to release, indemnify, defend and hold harmless the LEC from any and all loss, claims, demands, suits or other action, or any liability whatsoever, to any other party or person, for any personal injury to or death of any person or persons, or for any loss, damage or destruction of any property, whether owned by the 911 customer or others.

E. To the extent allowed by law, the 911 customer also agrees to release, indemnify and hold harmless the LEC for any infringement or invasion of the right of privacy of any person or persons, caused or claimed to have been caused, directly or indirectly, by the installation, operation, failure to operate, maintenance, removal, presence, condition, occasion or use of 911 service features and the equipment associated therewith, or by any services furnished by the LEC in connection therewith, including, but not limited to, the identification of the telephone number, address or name associated with the telephone used by the party or parties accessing 911 service hereunder, and which arise out of the negligence or other wrongful act of the LEC, the 911 customer, its user, agencies or municipalities or the employees or agents of any one of them.

F. PS 911 Service will be designed by the LEC to provide at least the same level of service reliability and quality as local exchange telephone service in the exchanges where 911 systems are equipped with the features required to provide PS 911 Service.

G. Adjustments for service interruptions experienced by the 911 customer are governed by and limited to Section 2 of the General Customer Services Tariff.

5. Private Switch 911 Service Rates and Charges

5.1 Rates and Charges for Facilities

5.1.1 Interexchange Facilities

See Section 5 of the Private Line Service Tariff for the appropriate rates and charges for interexchange facilities.

5.1.2 Intraexchange Facilities

Monthly Nonrecurring Rate Charge USOC

(A) From Private Switch to Control Office $ 54.00 $ 315.00 9PS (per facility)

(B) From Private Switch to PSAP 62.00 515.00 9PT (per facility)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Private Line Service of Texas dba Embarq Section 6 Original Sheet 6

PRIVATE SWITCH 911 SERVICE

5. Private Switch 911 Service Rates and Charges (Continued)

5.2 Database Management System

The rates and charges in this section relate to the administration and storage of PS 911 Service data records. The nonrecurring charges in A (below) apply at the time the records are initially created in the LEC’s database. The recurring rate is applied on a monthly basis for each month until the records are deleted. There is no charge to update the information associated with an individual record.

The nonrecurring charge in part B applies at the time an administrative site is first established. This charge applies when procedures are established enabling the administrative site to create and update records.

Monthly Nonrecurring Rate Charge USOC

(A) Charge per 10 records per PSP per $ 0.70 $ 5.05 ED2PG 911 Customer

(B) Nonrecurring Charge to Establish an 155.00 NR99P Administrative Site

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Index Original Sheet 1

SECTION 1

REGULATIONS SHEET

1. Undertaking of Centel ...... 1-4 2. Obligations of the Customer ...... 4-5 3. Use ...... 5 4. Payment Arrangement and Credit Allowances ...... 6-10 5. Definitions ...... 11-16 6. Connections ...... 17-20 7. Distance Learning and Information Sharing Program Discounts ...... 20

SECTION 2

DIGILINK - STANDARD DIGITAL SERVICE

1. General ...... 1 2. Regulations ...... 1-2 3. Description of Service ...... 2-3 4. Rates and Charges...... 4-5

SECTION 3

TRANSLINK - WIDEBAND DIGITAL SERVICE/1.544 Mbps

1. General ...... 1 2. Regulations ...... 1-3 3. Rate Configuration...... 4-7 4. Rates and Charges...... 8-9

SECTION 4

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

1. General ...... 1 2. Definitions ...... 1-2 3. Regulations ...... 3 4. Responsibility of the Customer...... 4 5. Responsibility of the Telephone Company ...... 4 6. Primary Market Area (PMA) ...... 5-9 7. Rate Applications ...... 10-15

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Index (T) First Revised Sheet 2 Cancels Original Sheet 2

SECTION 5

RESERVED FOR FUTURE USE SHEET (T)

(D)

(D)

SECTION 6

BUSINESS VIDEO SERVICE

1. General ...... 1 2. Regulations ...... 2-4 3. Method of Applying Rates ...... 4 4. Rates and Charges ...... 5

SECTION 7

SELECTVIDEO PLUS SERVICE

1. General ...... 1 2. Definitions ...... 2 3. Service Components ...... 3 4. Regulations ...... 4-5 5. Responsibility of the Customer ...... 6 6. Responsibility of the Telephone Company...... 7 7. Service Availability ...... 8 8. Application of Rates and Charges ...... 9-10 9. Rates and Charges ...... 11-12

SECTION 8

NETWORK RECONFIGURATION SERVICE

1. General ...... 1 2. Regulations ...... 1 3. Options and Features ...... 1-2 4. Technical Specifications ...... 3 5. Rate Regulations ...... 3-4 6. Rates and Charges ...... 4

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Index Original Sheet 3

SECTION 9

LIGHTLINK SERVICE SHEET

1. General ...... 1 2. Regulations ...... 1-6 3. Term Discount Plan (TDP) ...... 7 4. Termination Liability Charges ...... 8 5. Rate Categories ...... 9-10 6. Application of Rates ...... 11 7. Rates and Charges ...... 12-15

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 1

REGULATIONS

1. Undertaking of Centel

1.1 Scope

1.1.1 This tariff section contains the regulations and definitions governing the furnishing of Digital Link Service by Centel.

1.1.2 Digital Link Service is the furnishing of Centel facilities for communications between specified locations, within the local access and transport areas (LATAs) all within the state of Texas, 24 hours daily, seven days per week. Facilities may be those of Centel only, or those of Centel and other LECs.

1.1.3 Centel does not undertake to transmit messages, but offers the use of its facilities where available to customers for such purposes.

1.1.4 Services provided under this tariff shall be used by Digital Link Service customers for end-to-end service within the LATA. To establish end-to-end service, customers may order segements of Digital Link Services between a customer premises and a Centel-designated hub location when the services terminate in certain additional service features or central office-based services, e.g., central office multiplexing or Network Reconfiguration Service. Interexchange Carriers (ICs) may use services found in this tariff that will meet their administrative needs, however, an IC is restricted from using services found in this tariff to furnish a portion of their authorized service offerings.

1.2 Limitations

1.2.1 The use and restoration of services shall be in accordance with Part 64, Subpart D, Appendix A, of the Federal Communications Commission's (FCC's) Rules and Regulations which specify the priority system for such activities.

1.2.2 The furnishing of service under this tariff will require certain physical arrangements of the facilities of Centel and is therefore subject to the availability of such facilities.

1.2.3 Digital Link Service may be limited in order to comply with orders issued under wartime authority of the President of the Centel States.

1.3 Liability

1.3.1 In view of the fact that the customer has exclusive control of communications over the facilities furnished him or her by Centel, and of the other uses for which facilities may be furnished by Centel, and because of unavoidableness of errors incident to the services and to the use of such facilities of Centel, the services and facilities furnished by Centel are subject to the terms, conditions and limitations herein specified.

1.3.2 Centel's failure to provide or maintain facilities under this tariff shall be excused by labor difficulties, governmental orders, civil commotions, acts of God and other circumstances beyond Centel's reasonable control, subject to the interruption allowance provisions of this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 2 REGULATIONS 1.3 Liability - (Continued)

1.3.3 Centel's liability, if any, for its gross negligence or willful misconduct is not limited by this tariff. With respect to any other claim or suit, by a customer or any others, for damages arising out of mistakes, omissions, interruptions, delays, errors, or defects in transmission occurring in the course of furnishing service hereunder, Centel's liability, if any, shall not exceed an amount equivalent to the proportionate charge to the customer for the period of service during which such mistake, omission, interruption, delay, error, or defect in transmission or service occurs and continues. This liability shall be in addition to any amounts that may otherwise be due to the customer under this Tariff as an allowance for interruptions. However, any such mistake, omission, interruption, delay, error, or defect in transmission or service which is caused or contributed to by the negligence or willful act of the customer or user or which arises from the use of customer provided facilities or equipment shall not result in the imposition of any liability whatsoever upon Centel.

1.3.4 Centel shall be indemnified and saved harmless by the customer or user against:

(A) claims for libel, slander and infringement of copyright arising from the material transmitted over the facilities;

(B) claims for infringement of patents arising from combining with or using in connection with, facilities furnished by Centel apparatus and systems of the customer or user; and (C) all other claims arising out of any act of omission of the customer or user in connection with the facilities provided by Centel. 1.3.5 Centel will not be liable for any consequential, incidental or indirect damages for any cause of action, whether in contract or tort. Consequential, incidental and indirect damages include, but are not limited to, lost projects, lost revenues and loss of business opportunity, whether or not Centel was aware or should have been aware of the possibility of these damages. 1.3.6 Centel does not guarantee nor make any warranty with respect to equipment provided by it for use in an explosive atmosphere. The customer or user indemnifies and holds Centel harmless from any and all loss, claims, demands, suits, or other action, or any liability whatsoever, whether suffered, made, instituted or asserted by the customer or user or by any other party or persons, for any personal injury to or death of any person or persons and for any loss, damage or destruction of any property, whether owned by the customer or others, caused or claimed to have been caused directly or indirectly by the installation, operation, failure to operate, maintenance, removal, presence, condition, location or use of said equipment so provided. Centel will require each customer to sign an agreement for the furnishing of such equipment as a condition precedent to the furnishing of such equipment.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 3

REGULATIONS

1.3 Liability - (Continued)

1.3.7 Centel is not liable for any defacement of or damage to the premises of a customer (or user) resulting from the furnishing of channel facilities or the attachment of apparatus and associated wiring furnished by Centel on such premises or by the installation or removal thereof, when such defacement or damage is not the result of negligence of the agents or employees of Centel.

1.3.8 Centel shall in no way be liable for any harm or any damages arising in connection with any failure by the customer to properly bond or ground a mobile premises or any mobile structure in which service is to be provided (e.g., boats, RVs and mobile homes), as well as equipment and associated wiring located on the customer's side of the point of interconnection at any premises, whether fixed or mobile.

1.3.9 Centel will make reasonable efforts to cure any material failure to provide service caused solely by year 2000 defects in Centel hardware, software or systems. Due to the interdependence among telecommunications providers and the interrelationship with non-Centel processes, equipment and systems, Centel is not responsible for failures caused by circumstances beyond its control including, but not limited to, failures caused by: 1) the Customer; 2) other telecommunications providers; or 3) customer premises equipment. In addition, Centel does not ensure compatibility between Centel and non-Centel services used by the Customer.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 4

REGULATIONS

1.4 Provision of Facilities

1.4.1 Centel will provide all facilities necessary for Digital Link Service. The customer or user must provide his own terminal equipment or communications system for use with the service as specified in this tariff.

1.4.2 Digital Link Service furnished by Centel will be furnished at the rates contained in this tariff, provided the necessary facilities are available. Where facilities are not available, and unusual expenditures are involved in making Digital Link Service available, the customer may be required to pay additional charges to cover the unusual expenditure, or to contract for service beyond the initial period, or both.

1.4.3 The charges specified in this tariff do not contemplate work being performed by Centel employees involved at a time when overtime wages apply, due to the request of the customer, nor do they contemplate work once begun being interrupted by the customer.

If the customer requests labor be performed at hours of the day or days of the week other than normal work hours or days or on holidays, or interrupts work once begun, an additional charge based on the additional costs involved applies. Such charges do not apply if sufficient advance notice is given so that employees' work schedules can be changed and it is agreeable to Centel. The additional charge does not apply to overtime or premium time work at Centel's convenience.

1.4.4 The apparatus and associated wiring on customer's premises, furnished by Centel, shall be and remain the property of Centel, whose agents and employees have the right to enter said premises at any reasonable hour for the purpose of installing, inspecting, maintaining or repairing the channel facilities, apparatus and associated wiring and upon termination of the service, for the purpose of removing such channel facilities, apparatus and associated wiring.

2. Obligations of the Customer

2.1 The customer shall be responsible for:

2.1.1 Damages to facilities of Centel caused by the negligence or willful act of the customer or users.

2.1.2 Reimbursing Centel for any loss through theft of its equipment or apparatus on the customer's or user's premises.

2.1.3 Provision of the power required to operate Centel facilities installed on the premises of the customer or users.

2.1.4 Provision, installation and maintenance of sealed conduit with explosive-proof fittings between equipment furnished by Centel in explosive atmospheres and points outside the hazardous area where connection may be made with regular facilities of Centel, and may be required to install and maintain Centel equipment within the hazardous area if, in the opinion of Centel, injury or damage to Centel employees or property might result from installation or maintenance by Centel.

2.1.5 Obtaining permission for Centel agents or employees to enter the premises of the customer or user at any reasonable hour for the purpose of installing, inspecting, repairing or upon termination of the service, removing the facilities of Centel.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 5 REGULATIONS

2. Obligations of the Customer (Continued)

2.1 The customer shall be responsible for: (Continued)

2.1.6 Bonding and/or grounding a mobile premises or any mobile structure in which service is to be provided or used (e.g., boats, RVs and mobile homes), as well as any equipment and associated wiring on the customer's side of the point of interconnection at any premises, whether fixed or mobile.

2.2 Assignment and Transfer of Facilities

The customer may not assign or transfer the use of services provided under this tariff except, where there is no interruption of use or relocation of the services, such assignment or transfer may be made to:

2.2.1 Another customer, whether an individual, partnership, association or corporation, provided the assignee or transferee assumes all outstanding indebtedness for such services, and the unexpired portion of the minimum period and the termination liability applicable to such services, if any; or

2.2.2 A court appointed receiver, trustee or other person acting pursuant to law in bankruptcy, receivership, reorganization, insolvency, liquidation or other similar proceedings, provided the assignee or transferee assumes the unexpired portion of the minimum period and the termination liability applicable to such services, if any.

In all cases of assignment or transfer, the written acknowledgment of Centel is required prior to such assignment or transfer. All regulations and conditions contained in this tariff shall apply to such assignee or transferee.

The assignment or transfer of services does not relieve or discharge the assignor or transferor from remaining jointly or severally liable with the assignee or transferee for any obligations existing at the time of the assignment or transfer.

3. Use

3.1 General

Digital Link Service may be used for the transmission of communications to or from any station on the service.

3.2 Shared Use

3.2.1 A user must have a station on the service and the station must be located on the premises of the user and connected to the service by means of a separate local distribution channel.

3.2.2 An interexchange carrier who is a customer for Digital Link Service may not enter into a shared use arrangement between itself and others. (1)

3.2.3 Centel shall not be responsible for the manner in which the use of service will be allocated. Orders which involve the start, rearrangement, release, or discontinuance of service will be accepted by Centel only from the customer.

3.2.4 The charges for Digital Link Service shall be determined as provided in this tariff and all charges for the service will be billed to the customer.

(1) Customers wishing to use DigiLink_ in the provisioning of a resold or shared use arrangement should refer to the Special Access Section of the Access Service Tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 6

REGULATIONS

3. Use (Continued)

3.3 Unlawful Use

The service furnished under this tariff shall not be used for any purpose or in any manner directly or indirectly in violation of the law or in aid of any unlawful act or undertaking.

3.4 Resale of Use for Others (1)

Digital Link service shall not be used for any purpose for which a payment or other compensation shall be received by either the customer or user, or in the collection, transmission, or delivery of any communications for others.

4. Payment Arrangements and Credit Allowances

4.1 Payment of Charges and Deposits

4.1.1 The customer is responsible for payment of all charges as specified in this tariff for services furnished the customer or user. Nonrecurring charges are payable upon request.

A one-time penalty as allowed per P.U.C. SUBST. R. §26.27(a) will be applicable on any bill not received by Centel or at Centel's authorized payment agency by the next bill date. For purposes of applying the penalty, the due date should be extended to the first following business day if it would otherwise fall on a weekend or holiday. No penalty shall be assessed on federal, state, or local government bills. The penalty shall not be applied to any balance to which the penalty was applied in a previous billing. The onetime penalty shall only apply on undisputed amounts or if the dispute is resolved in favor of Centel.

4.1.2 If billing for Centel's utility services is found to differ from Centel's tariffed rates, or if Centel fails to bill the customer for such services, a billing adjustment will be calculated by Centel. If the customer is due a refund, an adjustment shall be made for the entire period of the overcharges. If an overcharge is adjusted by Centel within three billing cycles of the bill in error, interest is not applicable. However, if an overcharge is not adjusted by Centel within three billing cycles of the bill in error, interest shall be applied to the amount of the overcharge as specified in P.U.C. SUBST. R. §26.27(a). The rate of interest is set annually by the Commission for a twelve month period and is based on an average of prime commercial paper rates for the previous twelve month period. (2)

(1) Customers wishing to use DigiLink_ in the provisioning of a resold or shared use arrangement should refer to the Special Access Section of the Access Service Tariff. (2) The rates of interest to be paid on customer deposits in accordance with Texas Utilities Code Annotated §183.003 (Vernon 1998), and overbillings or underbillings per P.U.C. SUBST. R. §26.27(a), are established annually on December 1 for the subsequent calendar year by the Commission, as reflected in the Order Setting Interest Rates included in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 7

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.1 Payment of Charges and Deposits (Continued)

4.1.3 Centel may, in order to safeguard its interests, require an applicant or customer for service to make a deposit to be held by Centel as a guarantee of the payment of charges. Such deposit will be equivalent to up to two months charges for the service. The fact that a deposit has been made in no way relieves the applicant or customer from complying with the prompt payment of bills on presentation. At such time as the service is terminated the amount of the deposit is credited to the customer's account and any credit balance which may remain is refunded. Simple interest set annually by the Commission at the rate of not less than six percent per annum or greater than twelve percent per annum will be paid on deposits. (1) Payment of the interest to the customer shall be annually if requested by the customer, or at the time the deposit is returned or credited to the customer's account. The deposit shall cease to draw interest on the date it is returned or credited to the customer's account.

A transfer of service from one premises to another within the service area of Centel shall not be deemed a disconnection within the meaning of these rules, and no additional deposit may be demanded unless permitted by these rules.

When the customer has paid bills for service for 12 consecutive residential billings or for 24 consecutive commercial or industrial billings without having service disconnected for nonpayment of bill and without having more than two occasions in which a bill was delinquent, and when the customer is not delinquent in the payment of the current bills, Centel shall promptly and automatically refund the deposit plus accrued interest to the customer in the form of cash or credit to a customer's bill.

4.2 Cancellation for Cause

4.2.1 Centel, ten days after written notice to the customer prior to the stated date of disconnection, may immediately discontinue the furnishing of Digital Link Service without incurring liability upon:

(A) nonpayment of any sum due Centel or

(B) a violation of any condition governing the furnishing of service.

(1) The rates of interest to be paid on customer deposits in accordance with Texas Utilities Code Annotated §183.003 (Vernon 1998), and overbillings or underbillings per P.U.C. SUBST. R. §26.27(d) and (e), are established annually on December 1 for the subsequent calendar year by the Commission, as reflected in the Order Setting Interest Rates included in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 8

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.3 Minimum and Fractional Rates and Charges

4.3.1 The minimum period for which service is furnished and for which charges are applicable is one month, unless otherwise specified.

4.3.2 In applying a rate involving a fraction of a cent, the fraction is carried through the entire computation of the charge for the service. When the charge so computed includes a fraction of a cent, a fraction of less than one-half cent is disregarded and a fraction of one-half cent or more is treated as one cent.

4.3.3 If the period of use exceeds the minimum period, the charges for any fractional part of a month following the minimum period will be a proportionate part of the monthly charges based on the actual number of days the facilities are furnished. For the purpose of administering this regulation with respect to the determination of charges for a fractional part of a month, every month is considered to have thirty days.

The applicable charges for a Digital Link Service, or any component thereof, including additions to an existing service, shall commence on the day after service is furnished and will continue to accrue through and include the day on which such service is discontinued.

When an existing Digital Link Service, or any component thereof, is changed or rearranged at the request of the customer without the addition of equipment, access lines or channels, any revision in charges necessitated thereby shall commence on the same day that the change or rearrangement is completed.

4.4 Cancellation of Application for Service

4.4.1 Where the applicant cancels an application for service prior to the start of installation, no charge applies.

4.4.2 Where installation of facilities has been started prior to the cancellation, the charge specified in (A) or (B) following (whichever is lower) applies.

(A) A charge equal to the estimated costs incurred in such installation, less estimated net salvage.

(B) The charge for the minimum period of the service ordered by the customer as provided in this tariff, plus the full amount of any termination charges applicable.

4.4.3 Installation of facilities for a customer is considered to have started when Centel incurs any expense in connection therewith or in preparation therefore which would not otherwise have been incurred provided:

(A) The customer has advised Centel to proceed with the installation, or

(B) Centel has advised the customer that, per his order, it is commencing the installation.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 9

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.5 Suspension of Service

Upon request of the customer, service will be suspended without cancellation at any time after the minimum billing period, subject to (A) and (B) following:

(A) Service will be suspended for a period of not less than two weeks.

(B) Billing shall continue at the full rate.

4.6 Allowance for Interruptions

In the event a customer's service is interrupted other than by the negligence or willful act of the customer, and it remains out of order for eight normal working hours or longer after access to the premises is made available and after being reported to be out of order, appropriate adjustments or refunds shall be made to the customer. The amount of adjustment or refund shall be determined on the basis of the known period of interruption, generally beginning from the time the service interruption is first reported. The refund to the customer shall be the pro rata part of the month's flat rate charges for the period of days and that portion of the service facilities rendered useless or inoperative. The refund may be accomplished by a credit on a subsequent bill for telephone service.

For Business Video Service, no credit shall be allowed for an interruption of less than 24 hours. The customer shall be credited for an interruption of 24 hours or more at the rate of 1/30th of the applicable monthly rates for each period of 24 hours or fraction thereof that the interruption continues.

4.7 Special Charges, Fees and Taxes

There shall be added to the customer's bill for service, an additional charge equal to the pro rata share of any occupation, franchise, business, license, excise, privilege or other similar charge or tax, now or hereafter imposed upon the gross receipts or revenue of Centel by any municipal taxing body or municipal authority whether by statute, ordinance, law or otherwise, and whether presently due or to hereafter become due. The charge applicable to each customer will appear separately on the customer's regular monthly bill and shall be determined on a basis equal to the tax levied by each municipal taxing body or municipal authority. The amount of charge to the customer shall be computed by dividing the tax expressed as a percentage by 100% minus the tax expressed as a percentage and multiplying the decimal thus obtained by the customer's service charges to which such tax applies as reflected by the following formula: Tax % Amount of Charge to 100% - Tax % x Service Charges Subject to Tax = Customer.

The amount of charge to the customer will be rounded to the nearest cent.

4.8 Special Construction

4.8.1 Rates and charges for special construction will be based on estimated costs incurred by Centel and may include (1) one-time service charges, (2) recurring type charges, (3) termination liabilities, (4) or combination thereof. Special construction rates and charges are in addition to rates and charges for Digital Link Service in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 10

REGULATIONS

4. Payment Arrangements and Credit Allowances (Continued)

4.8 Special Construction (Continued)

4.8.2 Special construction is that construction undertaken:

(A) where facilities are not presently available, and there is no other requirement for the facilities so constructed.

(B) where facilities are of a type other than that which Centel would normally use in the furnishing of its services.

(C) where facilities are provided over a route other than that which Centel would normally use in the furnishing of its services.

(D) where facilities are provided in a quantity greater than that which Centel would normally construct to serve the customer needs.

(E) where facilities are provided on a temporary basis until permanent facilities are available.

(F) where facilities requested involve abnormal costs.

(G) where the service requested is provided on an expedited basis.

4.8.3 No charge applies where special construction has been started prior to cancellation and it is determined by Centel there is another requirement for the facilities.

4.8.4 No charge applies where the applicant cancels an application for service prior to the start of special construction of facilities.

4.8.5 Where special construction has been started prior to cancellation, and there is no other requirement for the specially constructed facilities, a charge equal to the costs incurred in the special construction, less net salvage, applies; except that where one or more, but not all, of the services involved in the special construction are canceled, a charge equal to the cost, less net salvage, incurred for the discontinued services applies instead. Net salvage is determined based on the value of reusable material, less cost of removal. In determining the charge, each canceled service is treated as discontinued as of the date on which it was to have been placed in service.

Special construction of facilities for a customer is considered to have started when Centel incurs any expense which would not otherwise have been incurred; provided, (1) the customer has advised Centel to proceed with the installation or, (2) Centel has advised the customer that per his order it is commencing the installation.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 11

REGULATIONS

5. Definitions

accessories - Devices which are mechanically attached to, or used with, the facilities furnished by Centel and which are independent of, and not electrically, acoustically, or inductively connected to, the conductors in the communications path of Centel facilities.

bit - The smallest unit of information in the binary system of notation.

Business Video local distribution channel - A channel for the transmission for a single standard 525-line/60-field monochrome or National Television Systems Committee (NTSC) - System M color video signal and an associated audio signal in the 7 kHz frequency range.

carrier or common carrier - See interexchange carrier.

category I - Private line services identified in Section 68.2(a)(iii) of the FCC's Rules and Regulations.

category III - Private line services identified in Section 68.2(a)(iii) of the FCC's Rules and Regulations.

central office - A local Centel switching system where telephone exchange service customer station loops are terminated for purposes of interconnection to each other and to trunks.

channel - A communications path between two or more points of termination.

channelize - The process of multiplexing-demultiplexing wider bandwidth or higher speed channels into narrower bandwidth or lower speed channels.

Clear Channel Capability - A feature that provides customers with an increase in usable bandwidth by providing an unconstrained data stream across the network.

communications system - Channels and other facilities which are capable, when not connected to the telecommunications network, of two-way communications between customer-provided terminal equipment.

composite data service - The combined use of terminal and customer-provided data switching equipment with the use of communications services of Centel by a composite data service vendor to perform data switching for others.

composite data service vendor - A customer that has been certificated by the proper state or municipal regulatory body, and/or the FCC pursuant to section 214 of the Communications Act of 1934, as amended to acquire and operate facilities to perform data switching for others. A customer shall be classified as a composite data service vendor only with respect to use of those exchange services which are used for the provision of composite data service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 12

REGULATIONS

5. Definitions (Continued)

customer - Any individual, partnership, association, joint-stock company, trust, corporation, governmental entity or any other entity which orders service and is responsible for the payment of charges and compliance with Centel regulations. A customer for Digital Link Service must have a communication requirement of his own for its use, except where:

- the customer is a composite data service vendor; or

- the service is provided for the transmission of communications relating directly to the business of a subsidiary corporation over which the customer exercises control through ownership of more than 50% of the voting stock; or

- the customer for Digital Link Service orders the addition of service points to meet the communications requirements of a user of such service and such additional service points are required to extend the transmission of communications to or from the Digital Link Service for which the customer has a communication requirement of his own.

data switching - As used in connection with composite data service denotes the switching of data (non-voice) messages by the interchange, controlling and routing of data messages between two or more stations, via communications facilities, wherein the information content of the message remains unaltered.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 13

REGULATIONS

5. Definitions (Continued)

distance learning - Instruction, learning, and training that is transmitted from one site to one or more sites by telecommunications services that are used predominantly for such instruction, learning, or training, including video, data, voice, and electronic information.

duplex - An operation which permits customers or users to communicate in both directions simultaneously.

educational institution - Accredited primary or secondary schools owned or operated by state and local government entities or by private entities; institutions of higher education as defined by the Education Code, §61.003(13); the Central Education Agency, its successors and assigns; regional education service centers established and operated pursuant to the Education Code §11.32 and §11.33; and the Texas Higher Education Coordinating Board; its successors and assigns.

encoded analog content - An analog signal which has been multiplexed and coded within a digital signal.

equivalent analog signal power - The power of the analog signal at the output of a zero level decoder, obtained when a digital signal is the input to the decoder. A zero level decoder yields an analog level of OdBm at its output when the input is a digital milliwatt signal.

exchange - A unit generally smaller than a local access and transport area (LATA), established by Centel for the administration of communications service in a specified area which usually embraces a city, town or village and its environs. It consists of one or more central offices together with the associated facilities used in furnishing communications service within that area. One or more designated exchanges comprises a given LATA.

High Capacity Service (DS1) - A special access service with a bandwidth of 1.544 mbps equivalent to TransLink - Wideband Digital Service/1.544 Mbps.

interactive multimedia communications - Real-time, two way, interactive voice, video, and data communications conducted over networks that link geographically dispersed locations. This definition includes interactive communications within or between buildings on the same campus.

interexchange carrier (IC) or interexchange common carrier - Any individual, partnership, association, joint-stock company, trust, governmental entity or corporation engaged for hire in interstate or foreign communication by wire or radio, between two or more exchanges.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 14

REGULATIONS

5. Definitions (Continued)

interoffice channel mileage - The component of a service between two Centel serving wire centers, between a serving wire center and a Centel-designated digital hub, between two digital hub locations or between a digital hub and an NRS hub.

intraLATA service - Digital Link Service where service point locations are all within the same LATA.

isochronous - Transmission timing derived from the signal carrying the data (i.e., no timing or clock lead is provided at the customer interface).

local access and transport area (LATA) - A geographic area established for the administration of telecommunications service. It encompasses designated local operating Centel exchanges which are grouped to serve common social, economic and miscellaneous purposes.

local distribution channel - A channel between a customer's premises and the Centel serving wire center or a Centel- designated digital or NRS hub which is also the customer's normal serving wire center.

move - As used in connection with the application of move charges for Digital Link Service denotes a change in the physical location (whether on the same or different premises), when made at the request of the customer without discontinuance of service, or facilities and items of equipment provided by Centel.

multiplexing - An arrangement that converts a higher bit rate signal to lower bit rate, or bandwidth, or from digital to voice grade channels.

network channel terminating equipment (NCTE) - Equipment located on customer premises for the purpose of providing certain transmission enhancements and network maintenance capabilities. For instance, NCTE corrects electrical distortion and static, tests for problems in transmission lines, performs signal amplification, and protects against hazardous power surges.

network interface - That point of connection at the customer's premises where premises services are connected to the telecommunications network. The network interface is a standard registration jack or its equivalent. (See point of interconnection.)

Network Reconfiguration Service (NRS) - A central office-based service which permits customers to remotely reconfigure their dedicated networks without going through normal Centel service order procedures.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 15

REGULATIONS

5. Definitions (Continued)

Network Reconfiguration Service hub (NRS hub) - Designated Centel serving wire center where NRS is provided. An NRS hub may be collocated with a Centel-designated digital hub, but not all digital hubs are designated as NRS hubs. NRS hub locations are specified in the National Exchange Carrier Association Inc. Wire Center Information Tariff (NECA Tariff).

other participating carrier-provided communications systems - The facilities provided by an other participating carrier to its customer which are capable, when not connected to Digital Link Service, of communications between customer-provided terminal equipment.

patron - As used in connection with composite data service, denotes a subscriber to the data switching services of a composite data service vendor.

point of interconnection -

The point of interconnection between Centel communications facilities and terminal equipment, protective apparatus or wiring at a subscriber's premises. Centel-installed facilities at, or constituting, the point of interconnection shall consist of wire or a jack conforming to Subpart F of Part 68 of the Commission's rules. "Premises" as used herein generally means a dwelling unit, other building or a legal unit of real property such as a lot on which a dwelling unit is located, as determined by Centel's reasonable and nondiscriminatory standard operating practices. The "minimum point of entry" (MPOE) as used herein shall be either (1) the closest practicable point to where the wiring crosses a property line or (2) the closest practicable point to where the wiring enters a multiunit building or buildings. Centel's reasonable and nondiscriminatory standard operating practices shall determine which of (1) or (2) shall apply. Centel is not precluded from establishing reasonable classifications of multiunit premises for purposes of determining which of (1) or (2) above shall apply. Multiunit premises include, but are not limited to, residential, commercial, shopping center and campus situations.

(a) Single Unit Installations. For single unit installations existing as of June 9, 1994 and installations installed after that date the point of interconnection shall be a point within twelve inches of the protector or, where there is no protector, within twelve inches of where the telephone wire enters the customer's premises.

(b) Multiunit Installations. (1) In multiunit premises existing as of June 9, 1994, the point of interconnection shall be determined in accordance with Centel's reasonable and nondiscriminatory standard operating practices. Provided, however, that where there are multiple points of interconnection within the multiunit premises, a point of interconnection for a customer shall not be further inside the customer's premises than a point twelve inches from where the wiring enters the customer's premises.

(2) In multiunit premises in which wiring is installed after June 9, 1994, the multiunit premises owner shall determine the location of the interconnecting point(s). The multiunit premises owner shall determine whether there shall be a single point of interconnection location for all customers or separate such locations for each customer. Provided, however, that where there are multiple points of interconnection within the multiunit premises, a point of interconnection for a customer shall not be further inside the customer's premises than a point twelve inches from where the wiring enters the customer's premises.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 16 REGULATIONS 5. Definitions (Continued) premises - - All portions of the same building occupied by the same customer, provided that: All portions are not separated from each other by intervening offices, rooms or suites not occupied by the customer. The portions on different floors are contiguous and that the portion on the upper floor is directly above the portion occupied on the lower floor. - All of the buildings occupied by the same customer, provided that: All of the buildings are located on the same continuous property, which is owned and/or leased by the same customer, and are not separated by a public highway. Note: A public highway is considered to mean a vehicular thoroughfare which is governmentally owned. Px64 Standards Compliance - Consultative Committee on International Telephony and Telegraphy (CCITT) established compressed digital video standards compliance that describes the video displays and compression requirements for digital services transmission. registered equipment - Customer premises equipment (CPE) which complies with and has been approved within the Registration Provisions of Part 68 of the FCC's Rules and Regulations. Secondary Channel Capability - An enhancement that provides additional capacity on DigiLink_ Digital Services, for use as a lower speed (secondary) channel through which the customer has the capability of performing functions such as on-line diagnostics, data monitoring, traffic measurements and network configuration management. serving wire center - The end office from which the customer designated premises would normally obtain dial tone from Centel for Local Exchange Service purposes. station - When used in connection with Digital Link Service denotes a point on a customer's or user's premises or a Centel-designated hub at which the Digital Link Service is terminated. telecommunications network - All facilities of Centel that are used to provide its service. Uniform Service Order Code (USOC) - A three or five character alphabetic, numeric, or an alphanumeric code that identifies a specific item of service or equipment. user - A person, firm, or corporation who is designated by the customer as a "user" of a Digital Link Service furnished to the customer and who may share such service with the customer in accordance with the provisions set forth in 3.2. A user must be specifically named in the customer's application for service. V and H coordinates method - A method for computing airline miles between two points by using an established formula which is based on the vertical (V) and horizontal (H) coordinates of the two points. wire center - A building in which one or more central offices, used for the provision of telephone exchange services, are located.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba CenturyLink Section 1 1st Revised Sheet 17 Cancels Original Sheet 17

REGULATIONS

6. Connections

6.1 General

Terminal equipment, derivation equipment and communications systems may be connected to Digital Link Service provided by Centel when such connection is made under the provisions of 6.2.

All connections as provided for in 6.2 shall be made through equipment furnished by the customer or user. The responsibility of Centel shall be limited to the furnishing of service to that point on the customer's or user's premises where provision is made for the connection of such equipment. The customer or user is responsible for testing its equipment or facilities to insure that when they are connected with Digital Link Service such equipment or facilities are operating properly.

The customer shall be responsible for payment of a Maintenance of Service Charge, for each repair visit by a Centel employee to the premises of the customer or user where the service difficulty or trouble report results from the use of equipment or facilities provided by the customer or user.

Maintenance of Service Charge, each visit . . . . . $ 30.00

The responsibilities of the customer and the responsibilities of Centel are further set forth in 6.4 and 6.5, respectively.

6.2 Connection of Terminal Equipment, Derivation Equipment and Communications Systems

6.2.1 The customer or user, by use of its own derivation equipment, may create digital bit streams from a Digital Link Service and such equipment may be connected at the customer's or user's premises for the transmission of such bit streams to facilities furnished for Private Line Service, Digital Link Service, Local or Long Distance Message Telecommunications Service furnished under the rates (D) and regulations of Centel's tariffs.

6.2.2 Connection to Digital Link Service

(A) Connection of terminal equipment and communications systems which do not have the capability to transmit signals with encoded analog content, may be connected to the telecommunications network or to category I or category III private line services via Digital Link Service. All connections to a Digital Link Service are made at the Centel provided network interface and must be made per the following regulations.

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 18

REGULATIONS

6. Connections (Continued)

6.2 Connection of Terminal Equipment, Derivation Equipment and Communications Systems (Continued)

6.2.2 Connection to Digital Link Service (Continued)

(B) Terminal equipment may be connected to Digital Link Service through, or in combination with, channel derivation equipment. If the connection provides the capability to transmit signals with encoded analog content via the Digital Link Service to the telecommunications network or to a category I or category III private line service, the terminal equipment must be connected in accordance with the FCC Registration Program. (See Registration Program)

In addition, when voice-band data terminal equipment is used with the channel derivation equipment the voice-band data terminal equipment must comply with Part 68 of the FCC's Rules and Regulations to ensure continued billing integrity.

(C) Registration Program - Part 68 of the FCC's Rules and Regulations (Registration Program) includes certain connections to Digital Link Service.

6.2.3 Unless a specific waiver has been granted by the FCC, or except as otherwise provided in 6.2.4 following, all connections of registered equipment to services furnished by Centel will be made through a point of interconnection. In most cases, this will be through a Centel-provided standard jack. In the case of a registered communications system utilizing complex wiring, a method of connection, jacks, terminal strips, etc., will be provided by Centel.

6.2.4 The requirement for the use of standard jacks as described in 6.2.3, preceding, is waived for registered equipment which is located in hazardous or inaccessible locations.

6.3 Accessories

Accessories provided by customers or users may be used in conjunction with Digital Link Service provided that such accessories comply with the provisions of 6.4.

6.4 Responsibility of the Customer

6.4.1 Where Digital Link Service is available under this tariff for use in connection with terminal equipment or communications systems provided by a customer or user, the operating characteristics of such equipment or systems shall be such as not to interfere with any of the services offered by Centel. Such use is subject to the further provisions that the equipment of a customer or user does not endanger the safety of Centel employees or the public; or damage, require a change in or the alteration of the equipment or other facilities of Centel; interfere with the proper functioning of such equipment or facilities; impair the operation of Centel's facilities or otherwise injure the public in its use of Centel services. Upon notice from Centel that the equipment provided by a customer or user is causing or is likely to cause such hazard or interference, the customer shall take such steps as shall be necessary to remove or prevent such hazard or interference.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 19

REGULATIONS

6. Connections - (Continued)

6.4 Responsibility of the Customer - (Continued)

6.4.2 Where a customer elects to connect a communications system to Digital Link Service the customer shall be responsible for:

(A) Compatibility of the connected communications system to Digital Link Service. This includes the replacing of channel service units due to technological changes in the network.

(B) Testing, sectionalization and clearance of trouble conditions or service difficulties on any communications system which is connected to Digital Link Service.

6.4.3 The consent of the customer must be obtained by the user prior to the connection of user provided terminal equipment or communications systems to a Digital Link Service provided to the customer.

6.5 Responsibility of Centel

6.5.1 Centel shall not be responsible for installation, operation or maintenance of any terminal equipment or communications systems provided by a customer or user. Digital Link Service is not represented as adapted to the use of such equipment or system and where such equipment or system is connected to Centel facilities the responsibility of Centel shall be limited to the furnishing of facilities suitable for Digital Link Service and to the maintenance and operation of such facilities in a manner proper for such digital service. Subject to this responsibility Centel shall not be responsible for (i) the through transmission of signals generated by such equipment or system, or for the quality of, or defects in such transmission or (ii) the reception of signals by such equipment or systems or (iii) damage to terminal equipment or communications systems provided by a customer or user due to testing.

6.5.2 Centel shall not be responsible to the customer or user, if changes in any of the facilities, operations or procedures of Centel used in the provision of Digital Link Service render any facilities provided by a customer or user obsolete or require modification or alteration of such equipment or system or otherwise affect its use or performance.

6.5.3 Centel undertakes to maintain and repair during normal working hours the facilities which it furnishes hereunder. The customer or user may not rearrange, disconnect, remove or attempt to repair any equipment installed by Centel without prior written consent of Centel.

6.6 Violation of Regulations

Where any terminal equipment or communications system provided by a customer or user is used with services furnished by Centel, and any of the provisions in Section 1, 6 are violated Centel will take such immediate action as necessary for the protection of its facilities, and will promptly notify the customer of the violation. The customer shall take such steps as are necessary to discontinue such use of the equipment or system or correct the violation and shall confirm in writing to Centel within ten days, following the receipt of written notice from Centel, that such use has ceased or that the violation has been corrected. Failure to discontinue such use or to correct the violation and to give the required written confirmation to Centel within the time stated above shall result in suspension of the customer's service until such time as there is compliance with the provisions of this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 1 Original Sheet 20

REGULATIONS

6. Connections - (Continued)

6.7 Connection of Network Channel Terminating Equipment

Effective January 2, 1986, in accordance with the FCC's Memorandum Opinion and Order on CC Docket 81-216, (FCC 85-564), Part 68 of the FCC's Rules and Regulations (Registration Program), was amended to provide for inclusion of NCTE for direct connection to subrate and high capacity digital services. The following dates and regulations were established.

6.7.1 Grandfathered equipment - Terminal equipment, including its premises wiring and protective apparatus (if any) and multiline terminating systems that were directly connected to subrate digital services on January 2, 1986, may remain connected and be reconnected to such digital services for life without registration, unless subsequently modified.

6.7.2 Interim installations - An interim program established by the FCC and Centel allowed for connection of terminal equipment, including premises wiring and protective apparatus (if any) to be installed (including additions to existing systems) up to June 30, 1987, without registration of any terminal equipment involved, provided that this terminal equipment is of a type directly connected to subrate or 1.544 mbps digital services as of January 2, 1986, or they appeared on the interim program summary for approved equipment. Any equipment connected under this interim program may require modification at the owners expense in response to Part 68 of the rules as adopted.

6.7.3 Registered only equipment - Any terminal equipment connected to subrate digital services after June 30, 1987 must comply with the FCC's Registration Program. The equipment must also comply with the requirements of Technical Reference Publications 62411 and/or 62310.

7. Distance Learning and Information Sharing Program Discounts

Upon submission of an affidavit that complies with the requirements of P.U.C. SUBST. R. §26.141(d) and HB2128, an educational institution or library may obtain a 25 percent discount on the tariffed rate for any tariffed service that is used predominantly for distance learning or information sharing programs.

"Distance learning" means instruction, learning and training that is transmitted from one site to one or more sites by telecommunications services that are used by an educational institution predominantly for such instruction learning or training, including video, data, voice and electronic information.

"Educational institution" means and includes: (a) accredited primary or secondary schools owned or operated by state and local governmental entities or private entities; (b) institutions of higher education as defined by Section 61.003, Education Code; (c) private institutions of higher education accredited by a recognized accrediting agency as defined by Section 61.003 (13), Education Code; (d) the Central Education Agency, its successors and assigns; (e) regional education service centers established and operated pursuant to Sections 11.32 and 11.33, Education Code; and (f) the Texas Higher Education Coordinating Board, its successors and assigns.

"Library" means a "public library" or "regional library system" as those terms are defined by Section 441.122, Government Code, or a library operated by an institution of higher education or a school district.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 2 Original Sheet 1

DigiLink - STANDARD DIGITAL SERVICE

1. General

DigiLink - Standard Digital Service is a service which supports synchronous, full-duplex transmission at bit rates of 2.4, 4.8, 9.6, 19.2 and 56 kilobits per second (kbps). This service is offered between specified locations on an intraLATA basis, when suitable facilities are available.

DigiLink - Standard Digital Service must be routed between customer premises via a Centel- designated digital serving office (DSO) within the same LATA.

2. Regulations

2.1 The regulations and rates specified herein are in addition to the applicable regulations found in other sections of this tariff.

2.2 Availability of Service

DigiLink - Standard Digital Service can only be provided where digital facilities exist. Serving offices where DigiLink - Standard Digital Service is available are determined by Centel.

2.3 Provision of Service

2.3.1 The minimum period of which DigiLink - Standard Digital Service is provided and for which rates and charges are applicable is six months, unless a different minimum period is established with Special Construction as provided in Section 1 of this tariff. Customers will be required to sign a six-month minimum billing contract. When a service is discontinued prior to the expiration of the minimum period, charges are applicable for the remaining portion of the minimum period, whether the service is used or not, and will be based on the rates in effect for the service at the time of discontinuance. The six month minimum billing period does not apply to 19.2 kbps service.

2.3.2 DigiLink - Standard Digital Service is furnished on a full-time basis (24 hours a day, seven days per week).

2.3.3 DigiLink - Standard Digital Service may be independently timed when access to a nationwide synchronization network is not available.

2.3.4 Customer requests for special routing of DigiLink - Standard Digital Service channels are provided in accordance with Section 1 of this tariff.

2.3.5 In the event suitable facilities are not available, or modifications to existing facilities are required, special construction charges will be applicable as provided in Section 1 of this tariff. Service availability will be negotiated locally.

2.3.6 Centel has the service responsibility up to the point of interconnection. The point of interconnection will be provided by Centel as set forth in Technical Reference - PUB 62310. Section 10 of this publication describes the four-wire physical interface specifications.

2.3.7 The customer shall be responsible for ordering DigiLink - Standard Digital Service and specifying the transmission speed required for operation with terminal equipment or communications systems provided by the customer.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 2 Original Sheet 2

DigiLink - STANDARD DIGITAL SERVICE

2. Regulations (Continued)

2.3 Provision of Service (Continued)

2.3.8 Digital equipment provided by the customer is subject to the regulations set forth in Section 1, 6.2 and 6.7.

2.3.9 DigiLink - Standard Digital Service may be used as a derived channel of a TransLink service through the use of the central office multiplexing additional service feature found in Section 4 of this tariff. It is the customer's responsibility to determine channel assignments for the derived channels of the TransLink service. Additional interoffice channel mileage may be required in order to route the DigiLink service to a central office multiplexing hub location for termination in the central office multiplexing arrangement.

2.3.10 DigiLink - Standard Digital Service may be terminated in a channel port of a Network Reconfiguration Service (NRS) found in Section 8 of this tariff. Additional interoffice channel mileage may be required to route the DigiLink service to an NRS hub location.

2.4 Allowance for Interruptions

Credit allowances are determined in accordance with regulations set forth in Section 1 of this tariff.

3. Description of Service

DigiLink - Standard Digital Service channels provide the transmission paths for digital data signals between two or more customer premises within a LATA.

3.1 Access Channels to a Digital Serving Office

3.1.1 Local Distribution Channel

A two-point transmission path between a customer's premises and the Centel serving office or NRS hub. Local distribution channels suitable for synchronous data rates of 2.4, 4.8, 9.6, 19.2 and 56 kbps, respectively, are provided.

3.1.2 Interoffice Channel

A two-point transmission path between the digital serving office or NRS hub and the serving office of the customer. Charges are based on the vertical and horizontal (V-H) distance between the digital serving office or NRS hub and the serving office of the customer. A fixed charge and rate per mile for the requested transmission speed will apply for each interoffice channel.

3.2 Channel Between Digital Serving Offices

3.2.1 Inter-Digital Serving Office Channel

A two-point transmission path between two digital serving offices or between a digital serving office and an NRS hub within the same LATA. Inter-digital serving office channels suitable for synchronous data rates of 2.4, 4.8, 9.6, 19.2 and 56 kbps, respectively, are provided.

3.3 Nonrecurring Charge

A nonrecurring charge applies per point of termination installed or moved as provided in 4, following.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 2 Original Sheet 3

DigiLink - STANDARD DIGITAL SERVICE

3. Description of Service (Continued)

3.4 Multi-Station Arrangement

A multi-station arrangement is required to provide for DigiLink - Standard Digital Service between three or more digital stations on the same and/or different premises located within a LATA.

This offering may consist of standard digital service for intraLATA service between three or more stations at speeds of 2.4, 4.8, 9.6 or 56 kbps. 19.2 kbps is not available at this time.

Multi-station arrangements will be provided at a digital serving office.

The number of two-point channels that may be specified for a given service may be limited by operating and transmission factors.

The rate for a multi-station arrangement is set forth in 4.3, following.

3.5 Secondary Channel Capability

This arrangement provides for a secondary channel which operates at a speed equivalent to one-third of the primary channel speed. This secondary channel operates independently from, but over the same physical facility as the primary channel, and is normally used by the customer for performing network management operations such as on-line diagnostics, data monitoring, traffic measurements and network configuration management.

Secondary channel capability is available on point-to-point or multi-point services which use non- repeatered local distribution channels. Secondary channel capability can only be provided at digital serving offices for DigiLink services.

Complementary customer-provided terminal equipment must be coupled with this service.

The rate for secondary channel capability is set forth in 4.4, following.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 2 First Revised Sheet 4 Cancels Original Sheet 4

DigiLink - STANDARD DIGITAL SERVICE

4. Rates and Charges (1)

4.1 Access Channels to a Digital Serving Office

4.1.1 Local Distribution Channel

- Per termination of a local distribution channel on a customer's premises.

For Transmission Monthly Nonrecurring Speed of: Rate Charge USOC

2.4 kbps $87.00 $150.00 SYN24 4.8 kbps 97.00 150.00 SYN48 9.6 kbps 115.00 150.00 SYN96 19.2 kbps 185.00 395.00 SYN19 ( I ) 56 kbps 215.00 200.00 SYN56

4.1.2 Interoffice Channel

- Per V-H mile between the digital serving office or NRS hub and the serving office for the mileage portion plus the fixed charge.

Monthly For Transmission Fixed Rate Per Speed of: Charge Mile USOC

2.4 kbps $12.65 $1.35 1LNQQ 4.8 kbps 14.25 1.60 ILNRQ 9.6 kbps 17.35 1.90 ILNSQ 19.2 kbps 35.70 2.75 ILNJQ 56 kbps 55.00 4.40 1LNTQ

4.2 Channels Between Digital Serving Offices

Inter-Digital Serving Office Channel

- Per V-H mile between the digital serving offices or between the digital serving office and the NRS hub for the mileage portion plus the fixed charge.

Monthly For Transmission Fixed Rate Per Speed of: Charge Mile USOC

2.4 kbps $17.75 $0.70 ILNQN 4.8 kbps 19.75 0.75 ILNRN 9.6 kbps 24.00 0.90 ILNSN 19.2 kbps 40.00 1.60 ILNJN ( I ) 56 kbps 59.00 2.20 ILNTN

(1) There is a six-month minimum billing period for DigiLink - Standard Digital Service in accordance with 2.3.1, preceding.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 2 Original Sheet 5

DigiLink - STANDARD DIGITAL SERVICE

4. Rates and Charges (1) (Continued)

4.3 Multi-Station Arrangement

When a DigiLink circuit is arranged for multi-station operation for transmission speeds of 2.4, 4.8, 9.6 and 56 kbps, the following charge applies per channel connected at a digital serving office in addition to other charges in this tariff.

Monthly Charge USOC

$18.00 6BN

Multi-station service is described in 3.4, preceding.

4.4 Secondary Channel Capability

When a DigiLink circuit is arranged for secondary channel capability, the following charge applies per local distribution channel connected on the circuit. This charge is in addition to other charges in this tariff.

For Transmission Monthly Nonrecurring Speed of: Charge Charge USOC

For all speeds $ 9.89 $ 112.00 SCA

Secondary channel capability is described in 3.5, preceding.

(1) There is a six-month minimum billing period for DigiLink – Standard Digital Service in accordance with 2.3.1, preceding.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 1

TransLink - WIDEBAND DIGITAL SERVICE 1.544 MBPS 1. General TransLink - Wideband Digital Service/1.544 Mbps, hereinafter referred to as TransLink service, is an intraLATA dedicated high capacity channel used for simultaneous two-way transmission of serial, bipolar, return-to-zero isochronous digital signals at a transmission speed of 1.544 megabits per second (mbps). The channel design, performance and maintenance objectives are specified in Southwestern Bell's Technical Publication. This service is available to customers in those LATAs served by and within the service territories of Centel only. TransLink is offered to customers for their administrative use. TransLink is not offered for resale. 2. Regulations 2.1 The regulations and rates specified herein are in addition to the applicable regulations found in other sections of this tariff. The services provided for TransLink are primarily designed to meet the private line communications requirements of business customers, i.e., non-interexchange carriers, and the regulations herein reflect reasonable support on the part of Centel in assisting the customer in the ordering and provisioning of private line services. This assistance includes, but is not limited to, advice as to which private line service best meets the customer's requirements, taking into consideration the customer's present and future communications needs. In addition, Centel will continue to assist and advise the customer and cooperatively respond to the requirements of the customer until such time as the private line service is discontinued. The aforementioned level of assistance is considered to be part of the private line service offering and will be provided at no additional charge. As an alternative to service provided in the Digital Link Service Tariff, customers also have the option to purchase some similar services from Section 5 of Centel's intrastate Access Service Tariff. However, Centel does not assist nor support customers in the ordering of or provisioning of intrastate access services beyond the requirements contained in the Access Service Tariff. Discounts are offered on Private Network Services for Certain Entities. Discounts on these services are offered only for the exclusive use and purchase by educational institutions; libraries; nonprofit telemedicine centers of academic health centers, public or not-for-profit hospitals, or state-licensed health care practitioners; public or not-for-profit hospitals; projects funded by the Telecommunications Infrastructure Fund; or any legally constituted consortium or group of entities listed in this paragraph. 2.2 Provision of Service TransLink service is available only on a point-to-point intraLATA basis. TransLink service is furnished on a full-time basis (24 hours a day, seven days per week). TransLink service can only be provided within the same LATA where existing digital facilities and equipment permit. Services between serving wire centers must have digital service components (digital connectivity) between all intermediate offices to have the ability to provide the service. Additional service features may be available only at selected central offices as determined by Centel. Customer requests for TransLink service may require construction of suitable service components. The regulations, rates and charges applicable to special construction are found in Section 1, 4.8, of this tariff. Service availability will be negotiated locally. Customer requests for special routing of TransLink service channels are provided in accordance with Section 1 of this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 2

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

2. Regulations (Continued)

2.2 Provision of Service (Continued)

Centel has the service responsibility up to the point of interconnection. The point of interconnection will be provided by Centel as set forth in Bellcore Technical Advisory TA-TSY-000342. This publication provides transmission parameter limits and interface combinations for high capacity special access services (e.g., DS-1), and may be obtained from:

Bell Communications Research Information Operation Center 60 New England Avenue Piscataway, N.J. 08854-4196

The placement of the point of interconnection shall be located in a manner consistent with federal and state regulatory requirements. This location will be at each customer's premises, unless specified otherwise by the customer or building/landowner and agreed to by Centel.

Digital equipment provided by the customer is subject to the regulations set forth in Section 1, 6.2 and 6.7.

TransLink - Wideband Digital Service/1.544 mbps may be terminated in a DS1 port of a Centel- provided Network reconfiguration Service (NRS) arrangement at a designated NRS hub location. Additional interoffice channel mileage may be incurred to route the TransLink service to the hub location. The DS1 port on the NRS arrangement will be considered as a service point on the circuit. Refer to Section 8 of this tariff for additional regulations concerning NRS.

2.3 Availability and Allowance for Interruptions

2.3.1 TransLink Not Equipped with SecureNet

Availability is a measure of the relative amount of time that a service is "usable" to the customer. For the purposes of TransLink service, service is considered unavailable when 10 consecutive severely errored seconds (SESs) are received. The service becomes available again when no SESs are received for 10 consecutive seconds.

The availability objective for TransLink service is 99.975% availability when averaged over three months.

Centel, in order to ensure the highest performance standards and service availability to the customer, offers the following service guarantee:

If a TransLink service fails due to Centel-provided equipment or facilities and the service is not restored to the customer within four hours of the outage report and the service is made available to Centel by the customer during those four hours, the customer will be credited for the full month of service on the following month's bill. This guarantee is subject to the following conditions:

(A) The monthly credit will be applied on a per circuit, per occurrence basis and will only be applied once during a month's period. Credits are not accumulative.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 3

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

2. Regulations (Continued)

2.3 Availability and Allowance for Interruptions (Continued)

2.3.1 TransLink Not Equipped with SecureNet (Continued)

(B) The trouble cause must be isolated to Centel-provided equipment. Trouble determined to be caused by customer-provided equipment, or trouble that clears without a positive determination as to cause, will not qualify for the service credit.

(C) The outage must be reported by the customer. Centel initiated reports will not qualify for a service credit.

(D) There may be occasions when the service does not meet the required operating parameters, but due to business conditions the customer will not release the circuit for immediate testing. The service must be made available to Centel for testing and maintenance. The four-hour clock does not begin until the outage is reported by the customer and the service is made available by the customer to Centel for repair.

(E) On TransLink service that uses central office multiplexing provided by Centel, the service credit applies only to the TransLink portion of the service, and will not apply to the derived channels nor to multiplexing using the TransLink service.

(F) The service guarantee applies to recurring rates and charges for TransLink local distribution channels and interoffice channel mileage.

(G) On TransLink service used with NRS, the service credit applies only to the TransLink portion of the service, and will not apply to NRS.

2.3.2 TransLink Equipped with SecureNet

(A) TransLink service equipped with SecureNet shall be allowed a credit for a single service interruption greater than 2.0 seconds. In no case shall the total amount of credit in a one month bill period exceed 100 percent of the monthly charge for that particular rate element.

(B) To receive a credit for a service interruption after 2.0 seconds, the interruption must occur in that part of the TransLink service equipped with SecureNet (e.g., a loop failure on a TransLink service would receive credit after a 2.0 second interruption; an interoffice facility failure on the same service would be credited after four hours).

(C) For a TransLink service equipped with SecureNet, the credit for a single service interruption greater than 2.0 seconds will be 50% of the recurring monthly rate for the applicable rate elements (e.g., Local Distribution Channel; Interoffice Channel Mileage, both fixed and per mile; Multiplexing; Clear Channel Capability; and SecureNet).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 4

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

3. Rate Configuration

3.1 General

There are four basic rate elements which may apply to TransLink service:

- Local distribution channel - Interoffice channel mileage - Additional service features - Surcharge

3.2 Local Distribution Channel

The local distribution channel is the channel between a customer's premises and the Centel serving wire center that normally provides service to that customer's premises.

3.3 Interoffice Channel Mileage

Interoffice channel mileage is defined as the component of the service between two serving wire centers, between a serving wire center and a Centel-designated digital hub, or between digital or NRS hubs. The serving wire centers may be located in the same exchange area, as in a multi-office metropolitan exchange, or may be located in different exchange areas.

Interoffice channel mileage charges include a fixed charge, and a per mile charge which is based on the vertical and horizontal (V-H) distance between serving wire centers, a serving wire center and a digital hub, between digital or NRS hubs, or between exchanges, measured in whole miles. Fractional miles are rounded to the next whole mile. V-H coordinates for serving wire centers and designated digital and NRS hubs can be found in the National Exchange Carrier Association, Inc. (NECA) Wire Center Information Tariff.

3.4 Additional Service Features

3.4.1 Central Office Multiplexing

Central office multiplexing is an arrangement which converts a 1.544 mbps channel to multiple channels suitable for use with voice grade or subrate digital services. Central office multiplexing is available only in certain Centel-designated multiplexing hub locations. Refer to the NECA Wire Center Information Tariff for locations. Special routing may be required in order to provide this service. There are three levels of central office multiplexing available:

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 5

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

3. Rate Configuration (Continued)

3.4 Additional Service Features (Continued)

3.4.1 Central Office Multiplexing (Continued)

(A) 1.544 mbps (DS1) to Voice

This arrangement provides for 24 channels for use with voice or voice grade data services. Derived channels of the 1.544 mbps channel to the hub may also be used for DigiLink Standard Digital Service or Dataphone Digital Service. Voice grade services may not include services which terminate directly into the public switched network.

(B) 1.544 mbps (DS1) to 64 kbps (DSO)

An arrangement that converts a 1.544 mbps channel to twenty-three (23) 64 kbps channels using digital time division multiplexing.

(C) 64.0 kbps (DSO) to Subrate

An arrangement that converts a 64 kbps channel to subspeeds of up to twenty 2.4 kbps, ten 4.8 kbps or five 9.6 kbps channels using digital time division multiplexing. This feature is available only in conjunction with 1.544 mbps (DS1) to 64 kbps (DSO) multiplexing as part of a cascading multiplex arrangement in the same multiplexing hub location.

3.4.2 Clear Channel Capability (CCC)

Clear channel capability (CCC) is a feature that provides the customer with an increase in usable bandwidth from 1.344 mbps to 1.536 mbps of an unconstrained data stream across the network. CCC is provided on 1.544 mbps service and provisioning of CCC in our network requires the customer signal at the channel interface to conform to bipolar with eight zero substitution (B8ZS) line code format as described in Bellcore Technical Advisory TA-TSY-000342. Customer equipment must be compatible with this method of providing the unconstrained signal. Provision of this feature may require special routing of the interoffice channel mileage.

3.4.3 Extended Superframe Format (ESF)

Extended superframe format (ESF) is a non-chargeable option that passes a customer-provided framing format for 1.544 mbps service. ESF extends the customer's 1.544 mbps framing structure from 12 to 24 frames and divides the 8 kbps 193rd bit position pattern into three distinct functions: 2 kbps for frame synchronization, 2 kbps for cyclic redundancy checking, and 4 kbps for performance monitoring.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 6

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

3. Rate Configuration (Continued)

3.4 Additional Service Features (Continued)

3.4.3 SecureNet

SecureNet provides automatic restoration capabilities which prevent service interruption in the event of a single facility break or a single loop electronics failure. SecureNet is available with point- to-point TransLink service only where fiber optic facilities are used to provide the TransLink service.

The automatic restoration capabilities are provided through the use of intelligent components which are capable of sensing transmission failure in the fiber facilities. The primary and secondary transmission paths are separately routed in geographically and physically separate fiber optic cables up to the point nearest the customer's premises that route redundancy can be achieved. In the event of a transmission failure caused by a single facility break or a single loop electronics failure, the intelligent components will automatically switch the TransLink service to the secondary transmission path within 2.0 seconds.

The secondary transmission path for TransLink service equipped with SecureNet will be routed in a geographically separate fiber optic cable up to the nearest point to the customer's premises that route redundancy can be achieved. In the event a facility break occurs in that portion of the TransLink service for which route redundancy could not be achieved (e.g., interoffice channel mileage), Centel cannot guarantee automatic restoration of the customer's service within 2.0 seconds, and a credit as set forth in 2.3.2 preceding will not apply. In this case, the normal allowance for service interruptions applies as outlined in 2.3.1 preceding.

SecureNet is available at those serving wire centers where equipment and facilities are available. Special construction charges may apply when fiber optic facilities are not available or unusual expenditures are involved in making them available to provide this feature. The service interval will be within two years from date of customer request for service or the agreed upon date if special construction applies.

The SecureNet option available is loop protection. This option provides automatic restoration of the TransLink service local distribution channel and physical route redundancy from the customer's premises to the customer's serving wire center in the event of a single loop failure.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 7

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

3. Rate Configuration (Continued)

3.5 Surcharge

3.5.1 General

This surcharge compensates Centel for use of the local exchange network when TransLink service connected to a PBX or equivalent device which is capable of interconnecting the TransLink service, or a derived voice-equivalent channel carrying a interexchange private line service, with local exchange service. TransLink service can provide a maximum of 24 voice-equivalent channels per service arrangement. Centel will automatically bill the appropriate surcharge on each voice- equivalent channel irrespective of whether the interconnection capability exists in the customer's premises equipment or in a Centrex-CO type switch unless the service is exempted from the surcharge by one of the methods in 3.5.2.

3.5.2 Exemption from the Surcharge

A customer may be exempted from the surcharge if the customer certifies that the TransLink service derived voice-equivalent channel is terminated in a device not capable of interconnecting the service with local exchange service. The customer may also be exempted by certifying that the derived voice-equivalent channel is associated with a switched access service in the same LATA that is subject to carrier common line (CCL) charges.

3.5.3 Exemption Certification

Exemption certification shall be in the form of a written notification to Centel. Such notification shall be provided by the customer, (1) at the time the service is ordered, or (2) at such time as the service is reterminated to a device not capable of interconnecting to the local exchange network, or (3) at such time as the service becomes associated with a switched access service that is subject to CCL charges.

The exemption certification is to be provided by the customer ordering the service. The certification must be signed by the customer or authorized representative and include the category of exemption, as set forth in the preceding for each termination, and the date which the exemption is effective.

If written certification is not received at the time an order for TransLink service is placed, the surcharge will be applied for each derived voice-equivalent channel. Exempt status will become effective on the date certification is received by Centel.

The customer shall also notify Centel when an exempted TransLink service is changed or reterminated such that the exemption is no longer applicable.

3.5.4 Crediting the Surcharge

Centel will cease billing the surcharge when certification that the service has become exempt from the surcharge as set forth in 3.5.3, preceding, is received. If the status of the service was changed prior to receipt of the exemption certification, Centel will credit the customer's account that an amount up to and limited to 90 days (three months) billing based on the effective date of the change specified by the customer in the letter of certification.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 First Revised Sheet 8 Cancels Original Sheet 8

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

4. Rates and Charges

4.1 Local Distribution Channel Monthly Rate Nonrecurring Charge Rate USOC

- Per channel terminated on a customer's premises $299.95 $645.00 1LDPJ ( I ) - Private Network Services 65.36 $159.53 PDNDXLR-SCH

4.2 Interoffice Channel Mileage

- Rate per V-H mile or fraction thereof, between serving wire centers, or between a serving wire center and digital hub. Monthly Rates Fixed Per Mile USOC 1.544 mbps

Mileage Bands

0 None None 3LBNA ( I ) Over 0 to 4 $134.54 $54.50 3LBNB Over 4 to 8 134.54 54.50 3LBNC Over 8 to 25 196.25 48.75 3LBND Over 25 to 50 226.25 47.50 3LBNE Over 50 226.25 47.50 3LBNF ( I ) Private Network Services Channel Mileage Termination (Per Two Term) 41.51 PDNHXF7-SCH Flat Rate Mileage Charge 41.29 PDNHXM7-SCH

4.3 Additional Service Features

Monthly Rate Nonrecurring Charge Rate USOC

Clear Channel Capability

- Per local distribution channel $30.00 $185.25 (1) CLR

Extended Superframe Format

- Per local distribution channel None None SF1

SecureNet

- Per local distribution channel 95.00 685.00 P7T

(1) Nonrecurring charge applies only to subsequent installation of this feature. No charge applies if provided at the time the local distribution channel is originally installed.

ISSUED: August 18, 2008 EFFECTIVE: August 28, 2008 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 3 Original Sheet 9

TransLink - WIDEBAND DIGITAL SERVICE/1.544 MBPS

4. Rates and Charges (Continued)

4.3 Additional Service Features (Continued)

Monthly Rate Nonrecurring Charge Rate USOC

Central Office Multiplexing

1.544 mbps (DS1) to Voice (1) - Per arrangement $ 292.24 None MQ1

1.544 mbps (DS1) to 64.0 kbps (DSO) - Per arrangement 347.26 None QMU

64.0 kbps (DSO) to Subrate (2) (3) - Per arrangement

- Up to twenty 2.4 kbps services 185.58 None QSU24

- Up to ten 4.8 kbps services 361.52 None QSU48

- Up to five 9.6 kbps services 702.74 None QSU96

4.4 Surcharge

- Per voice-equivalent channel terminated on a customer's premises (4) 25.00 None S25

(1) For rates for analog voice or data channels used in conjunction with this multiplexing arrangement refer to the Private Line Service Tariff, Section 2. For rates for DigiLink - Standard Digital Service refer to the Digital Link Service Tariff, Section 2. For rates for Dataphone Digital Service refer to the Dataphone Digital Service Tariff. (2) This additional service feature also requires the purchase of DS1 to DSO multiplexing as described above. (3) For rates for digital subrate services (2.4 kbps, 4.8 kbps and 9.6 kbps) used in conjunction with this multiplex arrangement, refer to the DigiLink_ - Standard Digital Services the Digital Link Service Tariff, Section 2, or the Dataphone Digital Service Tariff. (4) Refer to the Private Line Service Tariff, Section 1, for regulations on the application of surcharges for the distant termination of an interexchange private line channel that may be using a derived voice channel on a TransLink service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 1

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

1. General

MicroLink II is an optional intraLATA network service which provides network transport for a broad variety of interactive data services. It uses packet switching technology, digital interoffice transmission facilities, and the customer loop plant to provide economical common user switched data/information transport for bursty type data. Customers of MicroLink II service have the capability to send and receive data to and from any point within the MicroLink II network within the LATA. The originating and terminating points of intraLATA MicroLink II service may be in the same or different primary market areas (PMAs). PMAs are defined in Section 2 and listed in Section 6.1 of this tariff.

This service is available to customers in those LATAs served by Southwestern Bell Telephone Company.

2. Definitions

call destination end - This is the end point that the call originator is trying to reach. Typically, this would be the end of a virtual circuit supported by an information provider with direct access to the packet switching network.

call originating end - This is the beginning point of a virtual circuit. Typically, this would be the end of a virtual circuit supported by a user requesting information.

customer alerting - Provides a subscriber of message waiting indication the capability of activating and deactivating an alerting tone on end user lines served from suitably equipped end offices within a PMA. The alerting tone is provided in the form of a stutter dial tone and serves as notification that some type of action is warranted, e.g., a message is waiting for retrieval.

Detailed Report - Provides a paper printout of information associated with each session including but not limited to call setups, connect times, and kilosegments transmitted and received, per customer account.

direct access - A dedicated access line from the customer's premises to the packet switching network.

Fast Select - Allows limited amounts of customer-specific data to be sent and received during the call setup phase.

kbps - Kilobits per second. Another way to express is one thousand bits per second.

kilosegment - A segment is a means of measuring the size of data packets and consists of 64 octets (characters). A kilosegment is 1,000 segments.

Magnetic Tape Report - Provides a report, via magnetic tape, containing information associated with each call session, including but not limited to call setups, connect times, and kilosegments transmitted and received, per customer account.

Menu Server - Provides the option of accessing predetermined destinations in the packet switching network via a menu.

Network Terminating Number (NTN) - A telephone number used to identify direct access stations attached to the packet switching network.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 2

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

2. Definitions (Continued)

Network User Identification (NUI) - A number that identifies the user to the public packet switched network (PPSN) for billing purposes on originating calls. NUI is entered as a string of digits for validation. Validation of the NUI authorizes usage of the PPSN and usage of optional services that the customer has subscribed to in association with the NUI. Customers can have one or multiple NUIs.

packet switching network - Consists of all the packet switches and the inter-switch facilities that connect those switches together.

permanent virtual circuits (PVC) - Provides direct and private dial access customers a simulated dedicated channel to a specified location within the packet switching network. This eliminates the need to build a temporary channel prior to each transmission.

polling - is a process whereby a computer systematically contacts or “monitors" a terminal or another computer to determine if the monitored device seeks to transmit a message.

primary market area (PMA) - A MicroLink II primary market area (PMA) is distinguishable as being an exchange area suitably equipped to provide MicroLink II functionality within which telephone company subscribers may reach public dial access to MicroLink II service on a local seven digit basis. PMAs include any exchange optional/special type local calling arrangements (Extended Area Service or Extended Metropolitan Service). One or more PMAs may be located within a LATA.

private dial access - The ability of a customer to reserve one or more dial access terminations for the customer's exclusive use.

protocol - Set of rules for conducting interactions between two or more parties. These rules consist of syntax (header structure), semantics (actions and reactions that are supposed to occur), and timing (relative ordering and duration of states and events).

public dial access - The capability to dial into the packet switching network at varying bit rates, depending upon the type of termination required.

Restricted User Group - This allows customers to preselect a specific set of other customers with whom to communicate privately. Customer access lines in a restricted user group can only communicate with other access lines in that closed user group.

session - The period of time that common control network facilities are allocated to the establishment of a specific switched virtual call. It begins with call set up and continues until the common control network facilities are released for reuse by the network.

Summary Report - Provides a monthly total, via a paper printout, of information associated with each session including but not limited to call setups, connect times, and kilosegments transmitted and received by either user identification or originating city.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 3

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

3. Regulations

3.1 The following regulations are in addition to other regulations as stated in this and other Centel tariffs.

3.2 Provision of this service, or a portion thereof, is subject to the availability and operational limitations of the equipment and associated facilities.

3.3 The rates and charges for MicroLink II service are in addition to the established monthly and nonrecurring charges applicable to services terminated in or used in conjunction with MicroLink II.

3.4 Temporary suspension of service at the request of the customer, either partial or complete, is not applicable.

3.5 Customer-initiated moves, changes and rearrangements of the MicroLink II service, including protocol parameters, will be based on the appropriate nonrecurring charge unless otherwise noted, then the charges will be based on the actual cost including engineering, labor and material.

3.6 All charges that would normally be associated with a particular customer's user identification will be the responsibility of that customer. If unauthorized activity occurs, the owner of that user identification will be responsible for those charges.

3.7 Where a variety of equipment and facilities may be used to provide MicroLink II service, the telephone company reserves the right to determine which shall be used and to modify and change such equipment and facilities at its option.

3.8 No credit allowance will be made for interruptions due to negligence and/or failure of equipment provided by the customer or user. Furthermore, interruptions of service during any period in which the telephone company is not afforded access to the premises at which the MicroLink II service is terminated will not receive a credit allowance.

3.9 The minimum billing period for this service is one month. If service is discontinued after one month or during a fractional part of a month, all appropriate charges will be based on the actual number of days the service is furnished. For the purpose of administering this regulation with respect to the determination of charges for a fractional part of a month, every month is considered to have 30 days.

3.10 The printed reports and the magnetic tape report will be provided to the customer via first-class U.S. Mail Service unless otherwise agreed upon by the customer and the telephone company.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 4

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

4. Responsibility of the Customer

4.1 Where MicroLink II service is available for use in connection with terminal equipment or communications systems provided by a customer or user, the operational characteristics of such equipment or systems shall be such as not to interfere with any of the services offered by the telephone company. Such use is subject to the further provisions that the equipment provided by a customer or user does not endanger the safety of the telephone company employees or the public; damage, require change in, or alteration of the equipment or other services of the telephone company; interfere with the proper functioning of such equipment or services; impair the operation of the telephone company's equipment; or otherwise injure the public in its use of telephone company services. Upon notice from the telephone company that the equipment provided by customer or user is causing, or is likely to cause, such hazard or interference, the customer shall take such steps as shall be necessary to remove or prevent such hazard or interference.

4.2 The customer, upon request, shall furnish such information as may be required to permit the telephone company to design and maintain the MicroLink II service it offers and to assure that the service arrangement is in accordance with the regulations contained herein.

4.3 It shall be the responsibility of the customer to insure the continuing compatibility of the customer- provided terminal equipment that is used in conjunction with the MicroLink II service.

5. Responsibility of the Telephone Company

5.1 The telephone company shall not be responsible for installation, operation or maintenance of any terminal equipment or communications systems provided by a customer or user. The telephone company is not responsible for adapting MicroLink II service to the technological requirements of any specific customer equipment. The responsibility of the telephone company shall be limited to the furnishing of network equipment suitable for MicroLink II service and to the maintenance and operation of such equipment in a manner proper for such service. Subject to this responsibility, the telephone company shall not be responsible for the transmission of signals generated by customer-provided equipment or systems, or for the quality of, or defects in, such transmission or the reception of signals by such equipment or systems.

5.2 The telephone company shall not be responsible to the customer or user, if changes in any of the equipment, operations, or procedures of the telephone company, used in the provision of MicroLink II service, render any facilities provided by a customer or user obsolete or require modification or alteration of such equipment or systems or otherwise affect its use or performance, provided the telephone company has met any applicable information disclosure requirements.

5.3 The telephone company undertakes the responsibility to maintain and repair the service which it furnishes. The customer or user may not rearrange, disconnect, remove, attempt to repair, remote test or interfere with any network equipment installed by the telephone company without prior written consent of the telephone company.

5.4 The telephone company, by written notice to the customer, may immediately discontinue the furnishing of MicroLink II service without incurring liability upon nonpayment of any sum due to the telephone company or a violation of any condition governing the furnishing of service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 5 MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

6. Primary Market Area (PMA)

6.1 Following is a list of the exchanges and/or zones in each LATA that are included in the PMAs. In addition to these exchanges and zones, any exchanges having Extended Area Service (EAS) and/or Extended Metropolitan Service (EMS) arrangements with these exchanges or zones are included in the PMA. Exchanges having EMS and EAS service arrangements are listed in the Local Exchange Tariff.

Abilene LATA Abilene PMA - Abilene Exchange Amarillo LATA Amarillo PMA - Amarillo Exchange - Canyon Exchange Austin LATA Austin PMA (1) - Austin Principal Zone - Marshall Ford Zone - Bee Caves Zone - Pflugerville - Cedar Valley Zone - Round Rock - Creedmoor Zone - Webberville - Garfield Zone - Bee Creek - Jollyville Zone - Lake Travis - Manchaca Zone - Leander - Manor Zone Beaumont LATA Beaumont PMA - Beaumont Exchange - South Vidor Exchange - China Exchange - Vidor - La Belle Exchange - Westbury - Lumberton Exchange - Nederland-Port Neches Brownsville LATA Brownsville PMA - Brownsville Exchange - Los Fresnos - Port Isabel McAllen PMA - McAllen Exchange - Alamo-Pharr San Juan Exchange - Edinburg Exchange - Mission Exchange Harlingen PMA - Harlingen Exchange - Rio Hondo Exchange - San Benito Exchange (See Sheet 8 for Footnotes)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 6

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

6. Primary Market Area (PMA) (Continued)

6.1 (Continued) Corpus Christi LATA Corpus Christi PMA

- Corpus Christi Zone - Flour Bluff Zone - Calallen Zone - Padre Island Zone - Clarkwood Zone Victoria PMA - Victoria Exchange Dallas LATA Dallas PMA (1)

- Dallas Principal Zone - Richardson Zone - Addison Zone - Rylie Zone - Danieldale Zone - Cedar Hill Zone - Duncanville Zone - DeSoto Zone - Farmers Branch Zone - Lancaster Zone - Grand Prairie Zone - Lawson Zone - Hutchins Zone - Renner Zone - Mesquite Zone - Seagoville Zone - North Mesquite Zone - Sunnyvale Zone Fort Worth PMA (1)

- Fort Worth Principal Zone - Aledo Zone - Arlington Zone - Burleson Zone - Benbrook Zone - Crowley Zone - Edgecliff Zone - Eagle Mt. Lake Zone - Euless Zone - Haslet Zone - Fort Worth-Wedgewood Zone - Mansfield Zone - Kennedale Zone - Roanoke Zone - Lake Worth Zone - Silver Creek Zone - North Richland Hills Zone - Wheatland Zone - Saginaw Zone - Westland Zone - White Settlement Zone El Paso LATA El Paso PMA

- El Paso Exchange - Anthony Exchange - Canutillo Exchange - Clint Exchange (See Sheet 8 for Footnotes)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 7 MICROLINK II - PACKET SWITCHING DIGITAL SERVICE 6. Primary Market Area (PMA) (Continued) 6.1 (Continued) Houston LATA Houston PMA (1) - Houston Principal Zone - Smithers Lake Exchange - Airline Zone - Spring Exchange - Aldine Zone - Tomball Exchange - Alief Zone - Valley Lodge Exchange - Blue Ridge Zone - Apollo Zone - Buffalo Zone - Bammel Zone - Channelview Zone - Barker Zone - Deer Park Zone - Friendswood Zone - East Houston Zone - Lake Houston Zone - Ellington Zone - Langham Creek Zone - Jersey Village Zone - LaPorte Zone - Pearland Zone - Manvel Zone - Alvin Exchange - Satsuma Zone - Cypress Exchange - Seabrook Zone - Liverpool Zone - Sheldon Zone - Pinehurst Exchange - Westfield Zone - Richmond-Rosenberg Exchange Galveston PMA - Galveston Exchange - Texas City-La Marque Exchange - Port Bolivar Exchange Longview LATA Longview PMA - Longview Exchange Tyler PMA - Tyler Exchange - Lindale-Swan Exchange - Owentown Exchange Lubbock LATA Lubbock PMA - Lubbock Exchange - Slaton Exchange Midland LATA Midland PMA - Midland Exchange - Terminal Exchange Odessa PMA - Odessa Exchange - Terminal Exchange (See Sheet 8 for Footnotes)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 8 MICROLINK II - PACKET SWITCHING DIGITAL SERVICE 6. Primary Market Area (PMA) (Continued) 6.1 (Continued) San Antonio LATA San Antonio PMA (1)

- San Antonio Principal Zone - Elm Creek Zone - Babcock Zone - Elmendorf Zone - Buena Vista Zone - Geronimo Creek Zone - Culebra Zone - Helotes Zone - Foster Zone - Jarratt Zone - Fratt Zone - Leon Springs Zone - Indian Creek Zone - Montgomery Zone - Lackland Zone - Oak Island Zone - Martinez Zone - Potranco Zone - Palo Alto Zone - St. Hedwig Zone - Shavano Zone - Sandy Hills Zone - Southton Zone - Sayers Zone - Wetmore Zone - Thelma Zone - Bracken Zone - Universal City Zone Laredo PMA - Laredo Exchange Waco LATA Waco PMA - Waco Exchange - Eddy Zone - Axtell Exchange - Mart Zone - China Spring Zone - McGregor Zone - Gholson Zone - Moody Zone - Hallsburg Zone - West Zone - Leroy Zone - Lerona Zone - Rosenthal Zone - South Bosque Zone Temple PMA - Temple Exchange - Belton Exchange - Troy Exchange Wichita Falls LATA Wichita Falls PMA - Wichita Falls Exchange - Burkburnett Exchange - Henrietta Exchange - Iowa Park Exchange Footnotes: (1) Customer alerting is available in these PMAs only.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 9

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

6. Primary Market Area (PMA) (Continued)

6.2 Customers who are located outside the PMA may access public dial or private dial MicroLink II service via the public switched network by paying any applicable long distance charges required between their location and the PMA. Customers who are located outside the PMA and who require a direct access termination may obtain access to the PMA as described in 6.3 and 6.4, below.

6.3 Single location customers requiring direct analog access to MicroLink II and who are:

- located within the PMA will be required to pay only the appropriate four-wire voice-grade data channel termination charge as specified in Section 5 of the Special Access Section of Centel's Access Service Tariff.

- located outside the PMA will be required to pay all appropriate four-wire voice-grade data special access rates and charges, including channel mileage, required to reach the nearest MicroLink II serving office.

Multi-location customers requiring analog access to MicroLink II via a single direct access termination and who have:

- at least one location within the PMA must pay all applicable charges for four-wire voice-grade data multipoint analog special access, as specified in Section 5 of Centel's Access Service Tariff. Channel mileage required to connect the multipoint special access circuit to MicroLink II will not apply.

- no location inside the PMA must pay all four-wire voice-grade data special access rates and charges applicable to multipoint service, including all appropriate four-wire voice-grade data special access rates and charges and any applicable channel mileage charges required to reach the nearest MicroLink II serving office.

6.4 All customers requiring direct digital access to MicroLink II and who are:

- located within the PMA will be required to pay only the appropriate channel termination charge as specified in the Special Access Section of the Access Service Tariff for MegaLink I service.

- located outside the PMA will be required to pay all appropriate special access DigiLink_ rates and charges, including channel mileage, required to reach the nearest MicroLink II serving office.

6.5 New PMAs

If Centel receives a bona fide request for MicroLink II service in an exchange or zone not listed in Section 6.1 and not having an EAS or EMS service arrangement with these exchanges and zones, or for a MicroLink II feature or option not currently available in all PMAs, exchanges or zones listed in Section 6.1 (i.e., the request is for a feature in areas other than where currently available as indicated by footnote in Section 6.1), Centel will commit to providing the service or feature in that PMA or exchange only if the service or feature can be expanded to the new PMA or exchange at a cost which will be recovered by charging the same rates for the service or feature in the new PMA or exchange as the existing rates for the service or feature in the existing PMAs or exchanges. If Centel determines that establishment of a new PMA or exchange does not meet the guidelines described above, access to MicroLink II service or features is available to customers outside a PMA or exchange as described in 6.2, 6.3, and 6.4, above.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 10 MICROLINK II - PACKET SWITCHING DIGITAL SERVICE 7. Rate Applications 7.1 User Identification Monthly Nonrecurring Initial Order Rate Charge USOC First Network User Identification, each ...... $0.50 $ 40.00 LOG Additional Network User Identification, each ...... 0.50 3.00 LOGAX First Network Terminating Number, each ...... 0.50 40.00 NNB1X Additional Network Terminating Number, each ...... 0.50 3.00 NNBAX Subsequent Order First Network User Identification, each ...... 0.50 25.00 LOGSX Additional Network User Identification, each ...... 0.50 3.00 (7) LOGAX First Network Terminating Number, each ...... 0.50 25.00 NNB1S Additional Network Terminating Number, each ...... 0.50 3.00 NNBAS 7.2 Printed Reports Nonrecurring Charge (1) USOC Summary Report, each ...... $ 70.00 SU2++ Detailed Report, each ...... 75.00 BDT 7.3 Magnetic Tape Report Accounting Tape, each ...... 130.00 MBT 7.4 Public Dial Access Termination (8) Connect time, per minute of each call session Asynchronous Termination (4) Monthly Rate (2)(3) .3/1.2/2.4 kbps application, per minute ...... $0.016 4.8 kbps application, per minute ...... 0.069 9.6 kbps application, per minute ...... 0.137 (See Sheet 12 for Footnotes)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 11

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

7. Rate Applications (Continued)

7.5 Private Dial Access Termination (8)

7.5.1 Asynchronous Termination (4)

Monthly Host End User Rate USOC USOC

.3/1.2/2.4 kbps application, each ...... $ 20.50 LL524 LX524

7.5.2 Synchronous Termination (5) (6)

4.8 kbps application, each . . . 54.00 LL648 LX648

7.5.3 Serial Input-Output Termination (6) (9)

4.8 kbps application, each . . . 57.00 LL848 LX848

7.5.4 Nonrecurring Charges

Initial

Applies to the first Access Termination of each protocol $ 260.00

Additional

Applies to each additional Access Termination of the same protocol ordered on the same request:

Installed in the same PMA 50.00 Installed in a different PMA 155.00

Subsequent

Applies to the first Access Termination, ordered subsequently, for an existing protocol; need not be in the same PMA as existing protocol. 170.00

Additional

Applies to each additional Access Termination of the same protocol ordered on the same request:

Installed in the same PMA 50.00 Installed in a different PMA 155.00

(See Sheet 12 for Footnotes)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 12

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

7. Rate Applications (Continued)

Footnotes:

(1) This charge applies per report type, each occasion a particular report is generated for the customer. (2) For purposes of billing, all fractional minutes of use will be rounded to the next higher 1/10 of a minute. (3) These charges can be paid by either the originating end or the destination end. (4) The Non-Polled Asynchronous Protocol and X.PC Protocol are available with this type of termination. (5) The 3270 Bisynchronous Protocol is available with this type of termination. (6) The 3270 SDLC Protocol is available with this type of termination. (7) This charge also applies to change or identify a password for the customer. (8) Refer to other tariffs for charges that apply in addition to those stated herein for dial access service. (9) The X.25 Protocol Conversion is available with this type of termination.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 13

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

7. Rate Applications (Continued)

7.6 Direct Access Termination (1) 7.6.1 Asynchronous Termination (2) Monthly Host End User Rate USOC USOC Analog (5) 1.2 kbps application, each . . . $ 48.00 LPP12 LXE12 2.4 kbps application, each . . . 50.00 LPP24 LXE24 7.6.2 Synchronous Termination (3) Analog (5) 2.4 kbps application, each . . . 52.00 LLW24 LTA24 4.8 kbps application, each . . . 88.00 LLW48 LTA48 9.6 kbps application, each . . . 98.00 LLW96 LTA96 Digital (6) 2.4 kbps application, each . . . 53.00 LPQ24 LTB24 4.8 kbps application, each . . . 56.00 LPQ48 LTB48 9.6 kbps application, each 62.00 LPQ96 LTB96 7.6.3 Serial Input-Output Termination (4) Analog (5) 2.4 kbps application, each . . . 75.00 LL224 LXG24 4.8 kbps application, each . . . 88.00 LL248 LXG48 9.6 kbps application, each . . . 96.00 LL296 LXG96 Digital (6) 2.4 kbps application, each . . . 78.00 LL324 LXH24 4.8 kbps application, each . . . 80.00 LL348 LXH48 9.6 kbps application, each . . . 68.00 LL396 LXH96 56.0 kbps application, each . . 200.00 LL356 LXH56

(See Sheet 14 for Footnotes)

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 14

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

7. Rate Applications (Continued)

7.6 Direct Access Termination(1) (Continued)

7.6.4 Direct Access Nonrecurring Charges

Initial

Applies to the first Direct Access Termination of each protocol $ 260.00

Additional

Applies to each additional Direct Access Termination of the same protocol ordered on the same request:

Installed in the same PMA 50.00 Installed in a different PMA 155.00

Subsequent

Applies to the first Direct Access Termination, ordered subsequently, for an existing protocol; need not be in the same PMA as the existing protocol. 170.00

Additional

Applies to each additional Direct Access Termination of the same protocol ordered on the same request:

Installed in the same PMA 50.00

Installed in a different PMA 155.00

(1) Refer to the appropriate tariff for charges that apply for access from the customer's premises to the packet switching network. See Note (5) for four-wire voice-grade analog special access. See Note {6} for Digital Link DigiLink_ special access. (2) The Polled and Non-Polled Asynchronous Protocols are available with this type of termination. (3) The 3270 Bisynchronous Protocol is available with this type of termination. (4) The X.25 and 3270 SDLC Protocols are available with this type of termination. (5) Refer to 6.3 for application of rates. (6) Refer to 6.4 for application of rates.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 4 Original Sheet 15

MICROLINK II - PACKET SWITCHING DIGITAL SERVICE

7. Rate Applications (Continued)

7.7 Call Establishment (1) Monthly Rate (2) 7.7.1 Call setup, per setup $0.005 7.8 Character Transmission (5) Monthly Rate (2)(3) 7.8.1 Without protocol conversion, per kilosegment $0.20

Monthly Nonrecurring Charges: Rate Initial Subsequent Additional USOC 7.9 Optional Features Permanent Virtual Circuit, each . . . . $5.00 $ 0.00 $ 25.00 (6) $ 0.00 LDV Polled Protocol, (4) per terminal device . 1.00 6.00 27.00 (7) 6.00 LLQ Restricted User Group, per group ...... 5.00 50.00 70.00 (8) 16.00 LDJ Fast Select, per circuit equipped . . 4.00 0.00 25.00 (6) 0.00 LD5FS Menu Server, each line on screen . . . 0.02 140.00 150.00 (8) 11.00 MUZ Customer Alerting Connect Time, per minute (9) . . . 0.08 350.00 0.00 0.00 ACW

(1) This charge does not apply to sessions involving permanent virtual circuits. (2) These charges can be paid by either the originating end or the destination end. (3) For the purpose of monthly billing, a fractional kilosegment will be rounded to the next higher kilosegment. (4) Polling available with direct access only. Protocols that require this charge are Polled Asynchronous, 3270 Bisynchronous and 3270 SDLC. (5) Protocol Conversion of basic MicroLink II traffic is a nonregulated service available via separate contractual arrangements with the telephone company. (6) A nonrecurring charge applies only when this optional feature is established subsequent to the circuit with which it is associated. (7) The subsequent nonrecurring charge applies when this optional feature is connected to an existing terminal device. (8) The subsequent nonrecurring charge applies when this optional feature is connected to an existing circuit. (9) For billing purposes, all fractional minutes of use will be rounded to the next 1/10 of a minute.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 1 Cancels Original Sheet 1

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 2 Cancels Original Sheet 2

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 3 Cancels Original Sheet 3

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 4 Cancels Original Sheet 4

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 5 Cancels Original Sheet 5

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 6 Cancels Original Sheet 6

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 7 Cancels Original Sheet 7

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 8 Cancels Original Sheet 8

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 9 Cancels Original Sheet 9

RESERVED FOR FUTURE USE (T)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 10 Cancels Original Sheet 10

RESERVED FOR FUTURE USE (T)

(D)

(D)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company of Texas Digital Link Service dba CenturyLink Section 5 (T) First Revised Sheet 11 Cancels Original Sheet 11

RESERVED FOR FUTURE USE (T)

(D)

(D)

(D)

(D)

ISSUED: December 9, 2015 EFFECTIVE: March 3, 2016 TX 15-10 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 6 Original Sheet 1

BUSINESS VIDEO SERVICE

1. General

1.1 Business Video Service provides a video channel with two-way transmission capability for a standard 525-line/60-field monochrome, or National Television Systems Committee (NTSC) color, System M video signal. This service includes one associated audio signal in the 7 kHz frequency range. Business Video Service is available where facilities permit for local distribution channels and associated interoffice channels.

1.2 Business Video Service may consist of one Business Video local distribution channel at each end of a two-point circuit or one Business Video local distribution channel at one end of a two-point circuit and a TransLink_ local distribution channel (as set forth in Section 3 of this tariff) at the other end of the two-point circuit. This service may include the ancillary sale of one 4.8 kbps and one 9.6 kbps DigiLink channel.

1.3 Business Video Service provides for two-way compressed video/audio service on a two-point basis. Business Video is suitable for teleconferencing which connects two groups at different locations.

1.4 Business Video Service may be provided between two customer designated premises. Two types of service are offered, Business Video I and Business Video II.

Business Video I

Business Video I is a digital channel capable of two-way, two-point video/audio transmission. This video service is visually comparable to broadcast quality video, but has less stringent technical parameters and some noticeable motion impairment. The bandwidth for Business Video I digital video compression is 384 kbps.

Business Video II

Business Video II is a digital channel capable of two-way, two-point video/audio transmission. This video service is visually comparable to broadcast quality video, but has less stringent technical parameters. The bandwidth for Business Video II digital video compression is 1.544 Mbps.

1.5 The bandwidth for Business Video I and II digital audio compression is included within the transmission and is at the rate of 64 kbps. This transmission is considered to be compliant with the Px64 standards set forth by the Consultative Committee on International Telephony and Telegraphy (CCITT).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 6 Original Sheet 2

BUSINESS VIDEO SERVICE

2. Regulations

2.1 The regulations and rates specified herein are in addition to the applicable regulations found in other sections of this tariff.

2.2 The customer must provide the customer premises equipment at each end of the two-point network, such as room cameras, monitors, audio systems, graphics camera equipment and system control console (when required).

2.3 Business Video Service is provided as a point-to-point two-point service only.

2.4 The technical specifications are delineated in Technical Reference TP-76644.

2.5 Provision of Service

2.5.1 Business Video Service is offered with a 3 year minimum service period. The customer's rates will not change during the minimum service period, unless the customer modifies service, e.g., requesting new rates because of a general tariff rate change. In this situation, a new minimum service period will be established and modification charges, as set forth in 2.5.3 following will apply.

One month prior to the expiration of the minimum service period, the customer must select one of the following options:

(A) The customer may renew the service for another 3 year minimum period at the tariff regulations, rates and charges in effect at the time of renewal. Termination charges will be associated with the new minimum service period.

(B) The customer may elect to renew the service on a monthly basis at the tariff regulations, rates and charges in effect at the time of renewal. Termination charges do not apply.

(C) The customer may elect to disconnect the service upon expiration of the existing minimum service period.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 6 Original Sheet 3

BUSINESS VIDEO SERVICE

2. Regulations (Continued)

2.5 Provision of Service (Continued)

2.5.2 In the event service is terminated prior to the expiration of the minimum 36 months service period, termination charges, as specified following, will apply.

Termination Service Period Percentage

3 years 60%

The termination charge is calculated as follows:

Monthly rate x Months remaining x Termination in service period percentage

Example: A customer with a $2,000 monthly rate terminates service with 5 months remaining in 3 year service period. The termination charge would be calculated as follows:

$2,000 x 5 x .60 = $6,000

The termination charge would be $6,000.

In the event service is terminated after the 36 months minimum service period has elapsed, no termination charges apply.

If Special Construction applied for the service being terminated, an associated termination charge, as set forth in Section 14 of the Access Service Tariff applies.

2.5.3 The customer may request to modify service provided the service end points remain the same.

It is considered a modification of service when the customer upgrades from Business Video I Service to Business Video II Service. The original minimum service period for Business Video I Service remains intact. All rates and charges in effect for Business Video II Service at the time of the modification are applicable.

It is considered a modification of service when the customer, prior to the expiration of the minimum service period, requests a change in rates, i.e., the customer requests the currently effective rates which are different from those he is now paying. In this situation, a new minimum service period is established and all applicable nonrecurring charges apply.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 6 Original Sheet 4

BUSINESS VIDEO SERVICE

2. Regulations

2.6 Options

2.6.1 Split Screen Capability

This allows three separate areas of the room to be viewed simultaneously, or two areas and one graphics camera view. The bandwidth is split between the two monitors providing less than a full screen view on one of the monitors. If a single monitor or system is used, then this option allows two separate areas of the room to be viewed simultaneously, or one area and one graphics camera view. Note: This option varies from the Px64 standards compliance and requires specific manufacturer equipment compatibility at the receiving (viewing) end of the point-to-point video service.

3. Method of Applying Rates

3.1 Business Video Local Distribution Channel

This represents a two-point transmission path between a customer's premises and the customer's serving office.

3.2 Interoffice Channel

This represents a two-point transmission path between the serving offices of the two customer premises. Charges are for the fixed and per mile portions based on the Vertical and Horizontal (V- H) distance between the serving offices measured in whole miles. Fractional miles are rounded to the next whole mile.

3.3 Split Screen Capability

This allows three separate areas of the room to be viewed simultaneously, or two areas and one graphics camera view. The bandwidth is split between the two monitors providing less than a full screen view on one of the monitors. Rates apply per Business Video local distribution channel terminated at a customer's premises.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 6 Original Sheet 5

BUSINESS VIDEO SERVICE 4. Rates and Charges Monthly Nonrecurring USOC Rates Charges 4.1 Business Video Local Distribution Channel - Per point of termination - Business Video I 1RSBF $805.00 $920.00 - Business Video II 1RSB1 910.00 920.00 Monthly Rates USOC Fixed Per Mile 4.2 Interoffice Channel 4.2.1 Business Video I Mileage Bands 0 JZ3FA $ 0.00 $ 0.00 Over 0 JZ3FB 65.00 9.00 4.2.2 Business Video II Mileage Bands 0 JZ3GA $ 0.00 $ 0.00 Over 0 JZ3GB 70.00 11.00

Monthly Nonrecurring USOC Rates Charges 4.3 Optional Features and Functions 4.3.1 Split Screen Capability - Per Business Video Local Distribution Channel terminated at a customer's premises. 1CRV1 $130.00 1CRVS $212.00(1)

(1) Applicable when ordered subsequently to the initial installation of Business Video Service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 1

SELECTVIDEO PLUS SERVICE

1. General

1.1 Service Description

SelectVideo Plus is an intraLATA dial-up multi-rate switched digital data service. SelectVideo Plus provides digital connections ranging from 64 Kbps to 1536 Kbps (synchronous) in 64 Kbps increments of bandwidth via the public switched telephone network. The specific rate is user- selectable on a per call basis. Network access to SelectVideo Plus is via fully configured ISDN primary rate interfaces (PRI). A minimum of two PRIs (one configured for 23B Channels and one D Channel and one configured for 24B Channels) is required for 1536 Kbps calls.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 2

SELECTVIDEO PLUS SERVICE

2. Definitions

Bandwidth - The amount of information a customer can send or receive over a single connection in a specified period of time. Bandwidth is typically specified in Kilobits per second (Kbps).

B Channel (Bearer Channel) - A communications path capable of transmitting information at a speed of up to 64 Kbps. This communications path may be used by a SelectVideo Plus customer for data mode calls to provide data and/or video communications between customer specified locations.

D Channel (Delta Channel) - A communications path set up to transmit data in packet forms at speeds up to 64 Kbps. This communications path is designated to send and receive signaling messages.

Fully configured ISDN primary rate interface - An ISDN PRI where all 24 channels are equipped for service.

ISDN - Integrated Services Digital Network. A network architecture which allows the simultaneous transmission of information over a single facility incorporating the use of bearer channels (B channels) and a delta channel (D channel).

ISDN Primary Rate Interface (PRI) - Denotes the connection of a 1.544 Megabits per second (Mbps) digital facility to the ISDN-PRI capable central office switch. The twenty four channels are typically divided into 23 "B" Channels plus one "D" Channel. Software in the ISDN-PRI equipped central office switch defines the type of services (e.g., SelectVideo Plus Service) that will be carried within the 1.544 Mbps digital facility.

Kbps - Kilobits per second. Another way to express is one thousand bits per second

Primary Market Area (PMA) - An exchange suitably equipped to provide SelectVideo Plus functionality. One or more PMAs may be located within a LATA.

Synchronous - A method of data transmission that uses a timing source (clock) to synchronize the transmitter and receiver.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 3

SELECTVIDEO PLUS SERVICE

3. Service Components

3.1 SelectVideo Plus Arrangement: provides the communications path capable of bandwidth aggregation from the customer's premises to the SelectVideo Plus serving office. A SelectVideo Plus Arrangement may consist of Control Links and Communication Links. A minimum of one Control Link is required per SelectVideo Plus Arrangement. This minimum configuration provides digital connections from 64 Kbps to 1472 Kbps in increments of 64 Kbps. To transmit at 1536 Kbps per call, the SelectVideo Plus Arrangement must consist of at least one Control Link and one Communication Link.

3.1.1 Control Link: a PRI configured with one D Channel or a Back-up D Channel and 23 B Channels to provide up to 1472 Kbps of bandwidth.

3.1.2 Communication Link: a PRI configured with 24 B Channels to provide up to 1536 Kbps of bandwidth.

3.2 SelectVideo Plus Usage: provides for usage of the Public Switched Telephone Network (PSTN) per minute.

3.3 Link Extension: provides connection for customers located outside of a Primary Market Area equipped with SelectVideo Plus (but within the same LATA). One Link Extension is required for each Control Link and for each Communication Link.

3.4 Optional Features

3.4.1 Additional Telephone Numbers: Provides additional telephone numbers to the SelectVideo Plus user.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 4 SELECTVIDEO PLUS SERVICE

4. Regulations

4.1 The following regulations are in addition to other regulations as stated in this and other Centel tariffs.

4.2 SelectVideo Plus Service is restricted for the transmission of data mode calls only.

4.3 SelectVideo Plus Service requires the use of customer provided equipment (CPE) which must be compatible with the telephone company's equipment and facilities, and is subject to the interface specifications in TR-TSY-000776 (Network Interface Description for ISDN Customer Access) and TR-NWT-001203 (Generic Requirements for the Switched DS1/Switched Fractional DS1 Service Capability from an ISDN Interface (SelectVideo Plus/ISDN)). These documents may be obtained from:

Bellcore Document Register 445 South Street, Room 2J-125 P.O. Box 1910 Morristown, NJ Telephone: 1-800-521-2673

4.4 Compatible CPE must be provided at both the originating and terminating locations to successfully complete a SelectVideo Plus call.

4.5 SelectVideo Plus Service, when furnished at the same premises in combination with other flat-rated services, shall not be considered to be in conflict with the rules of Paralleling Service, pursuant to Section 3 of the General Customer Services Tariff.

4.6 SelectVideo Plus Service shall not be shared or jointly used except under Section 13 (Joint User Service) of the General Customer Services Tariff. Resale of SelectVideo Plus is prohibited.

4.7 Vacation Service is not offered for SelectVideo Plus Service.

4.8 Alternate billing (e.g., third-party billing) is not available for SelectVideo Plus Service.

4.9 Service Terms

4.9.1 All SelectVideo Plus Service components except SelectVideo Plus Usage have a minimum service term of one month.

4.9.2 The customer shall select a service term for each Control Link and Communication Link of either Month-to-Month, 36 or 60 continuous months. Customers selecting either a 36 or 60 month service term will be required to sign a contract per order.

4.9.3 Customers selecting the Month-to-Month service term may convert to the 36 Month or 60 Month service term. Customers converting from a Month-to-Month service term within 60 days from the date their SelectVideo Plus Service is established, will receive a credit equal to the difference in installation charges associated with the Month-to-Month service term and the newly selected service term.

4.9.4 Customers selecting the 36 Month service term may convert to the 60 Month service term.

4.9.5 Customers converting to a new service term will be required to sign a new contract.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 5

SELECTVIDEO PLUS SERVICE

4. Regulations (Continued)

4.10 Upon expiration of the 36 or 60 month service term, the customer may:

A) Continue service at the current Month to Month service term rate. That rate will be subject to any future changes.

B) Continue service by selecting a new 36 or 60 month service term for the Control Link and/or Communication Link at the current rates. The rates for the Control Link and/or Communication Link will not be subject to rate increases for the duration of the new 36 or 60 months service term selected by the customer. The customer will be required to sign a new contract.

C) Disconnect the service.

4.11 Moves

4.11.1 Different Central Office

Customer moves which require the SelectVideo Plus Service to be provided from a different central office will be considered a disconnection and a new connection of service. (Refer to paragraphs 8.8.1 and 8.8.2 for applicable charges.) Installation charges will apply.

4.11.2 Same Central Office

Customer moves which do not require the SelectVideo Plus Service to be provided from another central office will not constitute a disconnection of service provided the service is not interrupted. Installation charges associated with the 36 month service term (see Paragraph 9.1) will apply for each Control Link and/or Communication Link moved.

4.12 Customers may transfer SelectVideo Plus Service to a new customer at the same premises upon written concurrence of the telephone company. The new customer will incur Service Ordering Charges under Section 4 of the General Customer Services Tariff. In addition, the new customer shall assume all the previous customer's SelectVideo Plus Service indebtedness.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 6

SELECTVIDEO PLUS SERVICE

5. Responsibility of the Customer

5.1 Where SelectVideo Plus service is available for use in connection with terminal equipment or communication systems provided by a customer or user, the operating characteristics of such equipment or systems shall be such as not to interfere with any of the services offered by the telephone company. Such use is subject to the further provisions that the equipment provided by a customer or user does not endanger the safety of the telephone company employees or the public; damage or require alteration of the equipment or other services of the telephone company; interfere with the proper functioning of such equipment or services; impair the operation of the telephone company's equipment; or otherwise injure the public in its use of the telephone company services. Upon notice from the telephone company that the equipment provided by the customer or user is causing, or is likely to cause, such hazard or interference, the customer shall immediately take such steps as shall be necessary to remove or prevent such hazard or interference. All customer equipment must comply with FCC Rules and Regulations Part 68.

5.2 The customer, upon request, shall furnish such information as may be required to permit the telephone company to design and maintain the SelectVideo Plus service it offers and to assure that the service arrangement is in accordance with the regulations contained herein.

5.3 The customer shall insure the continuing compatibility of the customer provided equipment that is used in conjunction with the SelectVideo Plus service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 7

SELECTVIDEO PLUS SERVICE

6. Responsibility of the Telephone Company

6.1 The responsibility of the telephone company shall be limited to the furnishing of network equipment suitable for SelectVideo Plus service and the maintenance and operation of such equipment in a manner proper for such service. Subject to this responsibility, the telephone company shall not be responsible for the through-transmission of signals generated by customer provided equipment or systems or for the quality of, or defects in, such transmission or the reception of signals by such equipment or systems. The telephone company shall not be responsible for installation, operation or maintenance of any terminal equipment, data unit or communications systems provided by a customer or user. The telephone company is not responsible for adapting SelectVideo Plus service to the technological requirements of any specific customer provided equipment.

6.2 The telephone company shall not be responsible to the customer or user, if changes in any of the equipment, operations, or procedures of the telephone company used in the provision of SelectVideo Plus service render any facilities provided by a customer or user obsolete or require modifications or alteration of such equipment or system or otherwise affect its use or performance, provided the telephone company has met any applicable information disclosure requirements.

6.3 The telephone company shall maintain and repair the service which it furnishes. The customer or user may not rearrange, disconnect, remove, attempt to repair, remote test or interfere with any network equipment installed by the telephone company without prior written consent of the telephone company.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 8

SELECTVIDEO PLUS SERVICE

7. Service Availability

7.1 SelectVideo Plus Service is available within a suitably equipped primary market area (PMA). A PMA is an exchange (as defined in Section 1, of the Digital Link Service Tariff) containing a suitably equipped serving office.

7.2 Following is a schedule of the exchange, PMA and LATA where SelectVideo Plus Service is or will be available:(1)

Austin LATA Houston LATA Austin PMA Houston PMA - Austin Metro Exchange - Houston Metro Exchange

Dallas LATA San Antonio LATA Dallas PMA San Antonio PMA - Dallas Metro Exchange - San Antonio Metro Exchange

7.3 SelectVideo Plus Service does not have available the local calling scopes of optional Extended Area Calling Service (or any other optional Extended Area Calling Service-like calling plan).

7.4 SelectVideo Plus Service is offered to customers outside of the PMA (but within the same LATA) where existing facilities and operating conditions permit. In such cases, the customer will be required to subscribe to a Link Extension for each Control Link and for each Communication Link included in their SelectVideo Plus Arrangement.

7.5 All rates, charges, terms and conditions set forth herein provide for the furnishing of service where suitable facilities and equipment are available in the customer's PMA and do not create an obligation for the telephone company to construct such facilities or equipment especially for the provision of this service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 9

SELECTVIDEO PLUS SERVICE

8. Application of Rates and Charges

8.1 A minimum of one Control Link is required per SelectVideo Plus Arrangement. This minimum configuration will provide digital connections from 64 Kbps to 1472 Kbps in increments of 64 Kbps. To transmit at 1536 Kbps per call, the SelectVideo Plus Arrangement must consist of at least one Control Link and one Communication Link. A SelectVideo Plus Arrangement may also consist of more than one Control Link and any number of Communication Links. The maximum bandwidth available for SelectVideo Plus Arrangements consisting of at least one Control Link and one or more Communication Links is 1536 Kbps.

8.2 SelectVideo Plus Usage rates apply per originating minute of use per call.

8.3 Timing of a SelectVideo Plus call shall begin when an answer signal is received from the called party. Completion of a SelectVideo Plus call is signified when a disconnect signal is received from either the calling or called party.

8.4 SelectVideo Plus Usage charges shall apply per each minute or fraction thereof that each SelectVideo Plus call is connected. The minimum charge for a SelectVideo Plus call shall be one minute.

8.5 Where applicable, a Link Extension is charged in addition to the monthly rate for the associated Control Link or Communication Link. The Link Extension must be associated with and ordered at the same time as the Control Link or Communication Link.

8.6 The SelectVideo Plus Control Link and Communication Link rates will not be subject to rate increases for the duration of the 36 or 60 month term selected by the customer.

8.7 Optional Deferred Payment of Installation Charges and/or Special Construction Charges.

8.7.1 Before service is established, only those customers selecting either the 36 or 60 Month service term may request to spread all the installation charges (including the installation charges associated with optional features) and/or Special Construction Charges over a payment period of either 12, 24, 36, 48 or 60 months but not to exceed the 36 or 60 month service term. The customer cannot change the deferred payment term. The deferred monthly charge will equal the installation charges and/or special construction charges multiplied by the appropriate annuity factor shown below.

Payment Term (in months) 12 24 36 48 60 Annuity Factor 0.08879 0.04701 0.03315 0.02627 0.02218

Upon 30-days prior notification to the telephone company, the customer may terminate the deferred payment term by paying the remaining principal in full. No credit will be made for interest already paid or accrued.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 10

SELECTVIDEO PLUS SERVICE

8. Application of Rates and Charges (Continued)

8.8 Disconnection of Service Prior to the Expiration of the Service Term.

8.8.1 If the customer disconnects a SelectVideo Plus Control Link or Communication Link prior to the expiration of the 36 or 60 month service term, the customer shall pay a charge equal to the Control Link or Communication Link rate in effect on the date of the contract times the number of months remaining on the 36 or 60 Month Service Term for each Control Link or Communication Link disconnected.

8.8.2 If the customer disconnects a SelectVideo Plus Control Link or Communication Link prior to the expiration of the 36 or 60 month service term and the installation charges and/or special construction charge were deferred at the time service was established (Pursuant to Paragraph 8.7.1 above), the customer shall pay a charge equal to the remaining principal on the deferred payment term for each Control Link or Communication Link disconnected. No credit will be made for interest already paid or accrued.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 11

SELECTVIDEO PLUS SERVICE

9. Rates and Charges

9.1 SelectVideo Plus Service Components

Monthly Installation Charge Rate First (1) Addl.(2) USOC SelectVideo Plus Arrangements:

-Control Link, each ZSWZD 36 Months $ 450.00 $ 1,500.00 $ 900.00 60 Months 425.00 1,500.00 900.00 Month to Month 500.00 8,285.00 7,875.00

-Communication Link, each ZSW1X 36 Months 450.00 1,500.00 900.00 60 Months 425.00 1,500.00 900.00 Month to Month 500.00 8,270.00 7,870.00

Link Extension, each 75.00 0.00 0.00 OTVSX

Optional Feature:

Additional Telephone Numbers, each 1.00 10.50 10.50 ZTN

See Sheet 12 for Footnotes.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 7 Original Sheet 12 SELECTVIDEO PLUS SERVICE

9. Rates and Charges (Continued) IntraLATA Intra-PMA Outside the PMA (3) SelectVideo Plus Usage, per call, per minute of use 64 Kbps bandwidth $ 0.045 $ 0.000 128 Kbps bandwidth 0.090 0.045 192 Kbps bandwidth 0.135 0.090 256 Kbps bandwidth 0.180 0.135 320 Kbps bandwidth 0.225 0.180 384 Kbps bandwidth 0.270 0.225 448 Kbps bandwidth 0.315 0.270 512 Kbps bandwidth 0.360 0.315 576 Kbps bandwidth 0.405 0.360 640 Kbps bandwidth 0.450 0.405 704 Kbps bandwidth 0.495 0.450 768 Kbps bandwidth 0.540 0.495 832 Kbps bandwidth 0.585 0.540 896 Kbps bandwidth 0.630 0.585 960 Kbps bandwidth 0.675 0.630 1024 Kbps bandwidth 0.720 0.675 1088 Kbps bandwidth 0.765 0.720 1152 Kbps bandwidth 0.810 0.765 1216 Kbps bandwidth 0.855 0.810 1280 Kbps bandwidth 0.900 0.855 1344 Kbps bandwidth 0.945 0.900 1408 Kbps bandwidth 0.990 0.945 1472 Kbps bandwidth 1.035 0.990 1536 Kbps bandwidth 1.080 1.035

(1) Applies to the first unit ordered per request, per customer premises, per installation date. (2) Applies to all other units ordered in addition to the first unit per request, per customer, per premises, per installation date. (3) This charge applies, in addition to the rates for intrastate, intraLATA Long Distance Message Telecommunications Service (LD-MTS).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 1

NETWORK RECONFIGURATION SERVICE

1. General

Network Reconfiguration Service (NRS) permits customers to access a database maintained by the telephone company to reconfigure their dedicated private line or Digital Link services networks. Customers access the database with a customer-provided terminal on their premises and can perform the reconfigurations without going through normal service order procedures.

2. Regulations

2.1 The regulations and rates specified herein are in addition to the applicable regulations found in other sections of this tariff.

2.2 Provision of Service

NRS is available only at certain telephone company designated hub locations where digital cross- connect systems (DCS) are located. NRS hub designations are found in the National Exchange Carrier Association, Inc. Wire Center Information Tariff (NECA Tariff).

NRS uses a central office DCS for the remote reconfiguration of dedicated service channels. The cross-connect devices currently used by the telephone company are DCSs which interface only with a DS1 (1.544 mbps) signal, and cross-connect internally at the DSO (64 kbps) signal level. Customers can reconfigure their networks from their premises or may request the telephone company to perform the reconfigurations.

Customers access NRS with a customer-provided terminal on their premises using a dedicated line, available through the Private Line Service Tariff or the DigiLink_ section of this tariff, or on a dial-up basis with a local exchange line and seven digit telephone number.

Services that terminate in NRS are restricted to certain analog services available in the Private Line Service Tariff, DigiLink_ and TransLink_ services available from other sections of this tariff and Dataphone Digital Service available from the Dataphone Digital Service Tariff. Services which use the public switched network in any manner, e.g, Foreign Exchange, Foreign Serving Office, SwitchLink Plus_, or local exchange service may not be terminated in a channel port of the NRS service.

3. Options and Features

3.1 Two reconfiguration options are available to NRS customers: - On-demand - Reservation

3.2 The on-demand option will make immediate changes to the network, while the reservation option will be executed at a specified time designated by the customer. Both types of reconfigurations are available whether the customer performs the reconfigurations or requests the telephone company to perform them.

3.3 Features NRS provides the following features: (A) Routing Allows customers to reroute dedicated circuits to different locations at DS) or DS1 bandwidth.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 2

NETWORK RECONFIGURATION SERVICE

3. Options and Features (Continued)

(B) Renaming

Allows customers to rename their network locations, circuits, and facilities.

(C) Special day definition

Gives customers the capability to specify circuit reconfiguration on special dates, e.g., payday, holidays.

(D) Resource verification

Allows customers to verify the resource availability for the reservation period in their reconfiguration request prior to the system's confirmation or denial of the request.

(E) Transaction log

Provides customers a data base log that contains every transaction involving reconfigurations.

(F) Multi-level security

Eliminates outside entry into a customer's circuit network arrangement inventory.

(G) Compatibility table

Permits customers to view the allowable private line, Digital Link and Dataphone Digital combinations that can be used within their NRS.

(H) Path priority

Gives customers the ability to prioritize their circuit paths when multiple routes exist.

(I) Reservation summary screen

Allows customers to view the status of their reconfiguration reservations.

(J) Simple commands and screens

Permits customers to use simple commands on screens with easy to use menus.

(K) MACRO command/network modeling

Gives customers the ability to initiate with one command, multiple two-point cross- connections. Customers can build separate network models, such as day-time models, night-time models, and disaster recovery models, and invoke their activation or change from one to the other.

(L) Variable bandwidth

Supports scheduled reconfigurations which allows for the interchange of an internodal facility as either a full DS1 or one or more subtending channels. This feature requires a DS1 internodal facility in the customer's network.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 3 NETWORK RECONFIGURATION SERVICE 4. Technical Specifications 4.1 Services that are cross-connected by NRS must have identical technical characteristics to ensure compatibility and proper operation, e.g., data to data, voice to voice. 4.2 NRS specifications are delineated in Technical Reference TR-TSY-000366, which may be ordered from: Bell Communications Research Information Operations Center 60 New England Avenue Piscataway, New Jersey 08854-4196 5. Rate Regulations 5.1 This section describes the NRS rate elements. Rate applications specific to this service are also included. 5.2 General Four basic rate elements apply: - Service establishment - Database modification - Port charge - Reconfiguration charge 5.3 Rate element description A. Service establishment The service establishment charge applies per customer database setup. The customer database setup is a grid, built by the telephone company, that contains all the circuits the customer will be able to control and reconfigure. Security, as well as circuit inventory, is built into the grid, permitting the customer control of his or her circuits. Customer training is included. B. Database modification The database modification charge applies (per customer contact, or request) each time the customer requests a subsequent modification of its database grid. A modification can be an addition or deletion of circuits terminating on the cross-connect system, or a rearrangement of the database grid, i.e., an outside move, the rearrangement of the customer's routing priority, a change in the amount of bandwidth (from channelized data to video application), or a change in application of a DS1 (from all data to all voice). C. Port charge A port charge applies per port termination on the cross-connect system. There are two types of charges: - Channel port charge - channel ports apply for termination of all eligible services other than TransLink - Wideband Digital Service/1.544 Mbps. - DS1 port charge - TransLink - Wideband Digital Service/1.544 Mbps port termination. D. Reconfiguration charge A reconfiguration charge applies per cross-connect and disconnect successfully completed in a DCS per request.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 4

NETWORK RECONFIGURATION SERVICE

5. Rate Regulations (Continued)

There are two types of reconfiguration charges:

- For individual reservation or demand requests performed by the customer.

- For individual reservation or demand requests performed by the telephone company at the customer's direction.

5.4 Application of rates

A. When NRS is used with private line, Digital Link, or Dataphone Digital services, apply rate elements per circuit as set forth in the applicable tariffs. For service between two NRS hub locations, appropriate mileage rate elements apply based on the customer's desired capacity.

B. Nonrecurring charges apply to an NRS port.

C. One NRS port charge applies per circuit at the NRS hub. In addition, one port charge applies for each end of an interoffice or interexchange channel between two NRS hubs.

6. Rates and Charges

Monthly Nonrecurring Rate Charge USOC

6.1 Service Establishment - Per database setup None $ 1770.00 FN6DD

6.2 Database Modification - Per request None 86.00 FN6DC

6.3 Port Charges - per port - Channel port (DSO level) $ 11.00 21.00 PT5 - DS1 port 45.00 48.00 PT6

6.4 Reconfiguration Charges - Per cross connect and disconnect successfully completed per request.

- Individual reservation or demand requests performed by customer. None 1.25

- Individual reservation or demand requests performed by the telephone company at the customer's request. None 8.00

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 1

LIGHTLINK SERVICE

1. General

1.1 LightLink Service is furnished for Private Line IntraLATA Intraexchange and Interexchange communications by the Company.

1.2 LightLink Service is a service for the transmission of digital signals and uses digital transmission facilities.

1.3 LightLink Service provides for the simultaneous two-way transmission of isochronous digital signals at speeds of 44.736 Mbps (DS3), where facilities exist.

1.4 To ensure satisfactory operation, the terminal equipment provided by the customer must be compatible with the LightLink Service channel facility provided by the Company.

1.5 Unless specified following, the regulations for LightLink Service specified herein apply in addition to the regulations set forth in other sections of this tariff and the General Regulations outlined in Section 2 of the Company’s General Customer Services Tariff.

1.6 The rates specified for LightLink Service in 7. following contemplate the provision of a digital quality facility utilizing existing interoffice carrier equipment and/or exchange cable facilities compatible with this service. If equipment, new facilities or changes to existing facilities are required for the provision of this service, then charges as specified in Section 5, Charges Applicable Under Special Conditions, of the General Customer Services Tariff will apply in addition to the rates for LightLink Service.

2. Regulations

2.1 Description of Service

2.1.1 LightLink Service provides a high capacity channel for the transmission of 44.736 Mbps isochronous serial data having a line code of bipolar three zero substitution (B3ZS). LightLink Service is provided between two points located within a LATA. LightLink Service is available utilizing an electrical interface. The interface will have the characteristics of its respective signal at the point of demarcation. The required format and interface specifications are contained in Technical Reference Publication 62508 and 62411, and the associated Addendum TR-INS-000342 and TR-NPL-000054.

2.1.2 Multipoint service is not available with LightLink Service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 2

LIGHTLINK SERVICE

2. Regulations (Continued)

2.1 Description of Service (Continued)

2.1.3 A Channel Service Unit (CSU) or appropriate termination equipment provided by the customer is required at a customer's or authorized user's premises to perform such functions as:

- proper termination of the service - amplification - signal shaping - remote loop-back

2.1.4 The design, maintenance and operation of LightLink Service contemplates communications originating and terminating as (1) a customer premises to customer premises channel via the Company's Serving Wire Center and/or through remote Serving Wire Centers; (2) a customer premises to the Serving Wire Center and/or remote Serving Wire Centers - partial channel (link); or (3) a central office to central office (interoffice) partial channel (link).

2.2 Definitions

2.2.1 Channel Mileage - Channel Mileage provides for the end office equipment and the transmission channel between the Serving Wire Centers associated with two customer designated premises. Channel Mileage is comprised of Channel Mileage Facility (per mile) and Channel Mileage Termination (fixed) rates.

2.2.1.1 Channel Mileage Facility (Per Mile) - The Channel Mileage Facility (per mile) recovers the cost for the transmission path that extends between the Company Serving Wire Centers and includes primarily outside plant used to provide the facility.

2.2.1.2 Channel Mileage Termination (Fixed) - Channel Mileage Termination (fixed) recovers the cost for end office equipment associated with terminating the facility (i.e., basic circuit equipment and terminations at Serving Wire Centers).

2.2.2 Channel Service Unit (CSU) - The term "Channel Service Unit (CSU)" denotes equipment provided by the customer to terminate a digital facility on the customer's premises.

2.2.3 Channel Termination – The local facility from the customer's designated premises to the Serving Wire Center.

2.2.4 DS3 - This denotes a channel service expressed in terms of its digitally encoded data bit rate in accordance with the North American hierarchy of digital signal levels. It has a 44.736 Mbps transmission data rate, and provides for the two-way simultaneous transmission of randomized Non-Return-to-Zero (NRZ) signals with B3ZS format.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 3

LIGHTLINK SERVICE

2. Regulations (Continued)

2.1 Definitions (Continued)

2.2.5 Nonrecurring Charge - A one-time charge for the initial installation, the installation of functions and features and service rearrangements.

2.2.6 Serving Wire Center - The local telephone central office assigned to subscribers in a predetermined geographic area.

2.3 Connections

2.3.1 Customer-Provided Terminal Equipment, Customer-Provided Derivation Equipment and Customer-Provided Communications Systems may be connected to LightLink Service when such connection is made in accordance with the provisions specified in (2.3.2), (2.3.3) and (2.3.4) following.

2.3.2 Responsibility of the Company

2.3.2.1 The responsibility of the Company shall be limited to the furnishing and maintenance of LightLink Service to a network interface on the customer’s premises where provision is made for the connection of local service.

2.3.2.2 The Company shall not be responsible for installation, operation or maintenance of any terminal equipment or communications systems provided by the customer. LightLink Service is not represented as adapted for the use of such equipment or system. Where such equipment or system is connected to Company facilities, the responsibility of the Company shall be limited to the furnishing of facilities suitable for LightLink Service and to the maintenance and operation in a manner proper for such digital service. The Company shall not be responsible for:

2.3.2.2.1 - The through transmission of signals generated by such equipment or system, or for the quality of, or defects in, such transmission, or

2.3.2.2.2 - The reception of signals by such equipment or systems, or

2.3.2.2.3 - Damage to terminal equipment or communications systems provided by a customer or authorized user due to testing.

2.3.2.3 The Company shall not be responsible to the customer if changes in any of the facilities, operations or procedures of the Company utilized in the provision of LightLink Service render any facilities or equipment provided by a customer obsolete, or require modification or alteration of such equipment or system or otherwise affects its use or performance.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 4

LIGHTLINK SERVICE

2. Regulations (Continued)

2.3 Connections (Continued)

2.3.2 Responsibility of the Company (Continued)

2.3.2.4 The Company is responsible for maintaining and repairing the facilities it furnishes. The customer may not rearrange, disconnect, remove or attempt to repair any equipment installed by the Company without prior written consent of the Company.

2.3.2.5 LightLink Service is designed to meet or exceed a performance objective of 99% error-free seconds of transmission per 1000 seconds on a daily basis and 99.9% availability on an annual basis when measured through the digital termination equipment.

2.3.2.6 In order to maintain the quality of LightLink Service, the Company reserves the right to perform preventative maintenance and software updates to the network. The Company has classified maintenance as follows:

2.3.2.6.1 Scheduled Maintenance

Scheduled maintenance is performed for functions such as hardware and software upgrades and network optimization. The Company will perform these tasks in a maintenance window that is anticipated to minimize disruption of customer service and activity. The Company will provide advance notice of all scheduled maintenance.

2.3.2.6.2 Demand Maintenance

Demand maintenance may occur as a result of unexpected events and is performed when LightLink Service network elements are in jeopardy. The Company will perform this type of maintenance at its discretion. Due to the nature of demand maintenance, prior notification may not be possible; however, the customer will be informed when the maintenance has been completed.

2.3.3 Responsibility of the Customer

2.3.3.1 The customer is responsible for installing and testing the customer premises equipment or facilities to insure that when they are connected to LightLink Service such equipment or facilities are operating properly.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 5

LIGHTLINK SERVICE

2. Regulations (Continued)

2.3 Connections (Continued)

2.3.3 Responsibility of the Customer (Continued)

2.3.3.2 The operating characteristics of the customer premises equipment or facilities shall be such as to not interfere with any of the services offered by the Company. Such use is subject to the further provisions that the equipment provided by a customer does not: endanger the safety of Company employees or the public; damage, require change in or alteration of the equipment or other facilities of the Company; interfere with the proper functioning of such equipment or facilities; impair the operation of the Company’s facilities or otherwise injure the public in its use of the Company’s services. Upon notice that the equipment provided by a customer is causing or is likely to cause such hazard or interference, the customer shall take such steps as shall be necessary to remove or prevent such hazard or interference.

2.3.3.3 The customer’s responsibility shall include cooperative testing with the Company as may be necessary. Where regeneration and/or equalization adjustments or changes may be required to compensate for rearrangements and/or changes in outside plant facilities, the customer will be responsible for all expenses incurred in changes to his customer premises equipment.

2.3.4 Connection of Customer-Provided Terminal Equipment, Customer-Provided Derivation Equipment and Customer-Provided Communications Systems

2.3.4.1 The following provisions will apply:

2.3.4.1.1 Customer-Provided Terminal Equipment and/or Customer-Provided Communications Systems may be connected at the premises of the customer to LightLink Service.

2.3.4.1.2 The customers, by use of their own derivation equipment, may create digital bit streams from LightLink Service and such equipment may be connected for transmission of such bit streams when connected through a customer-provided CSU.

2.3.4.1.3 The undertaking of the Company is to furnish LightLink Service as ordered and specified by the customer except as specified in (2.3.4.4) following.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 6

LIGHTLINK SERVICE

2. Regulations (Continued)

2.3 Connections (Continued)

2.3.4 Connection of Customer-Provided … (Continued)

2.3.4.2 Connections to Other Services Furnished by the Company to the Same Customer

LightLink Service furnished by the Company may be connected by the customer to another service or to other services furnished by the Company as specified in (2.3.2) preceding. Connected services are subject to all rules and regulations governing the provisioning of those services.

2.3.4.3 Connections to Other Services Furnished by the Company to Different Customers

The customer may connect at the premises of the customer, to another LightLink Service or other services furnished by the Company to different customers as specified in (2.3.2) preceding. Connected services are subject to all rules and regulations governing provisioning of those services.

2.3.4.4 Connection of Channel Service Units

A Channel Service Unit (CSU) or appropriate termination equipment must be provided by the customer to connect a Company-provided digital facility. This equipment must comply with the technical requirements outlined in Part 68 of the FCC Rules and Regulations.

2.3.4.5 The customer shall be responsible for payment of a Maintenance of Service Charge, as set forth in Section 15.3, Maintenance of Service Charges, of the General Customer Services Tariff, for visits by the Company to the customer's premises where the service difficulty or trouble report results from the use of equipment or facilities provided by the customer.

2.3.4.6 The customer may not rearrange, disconnect, remove or attempt to repair any equipment installed by the Company without the prior written consent of the Company.

2.3.4.7 For maintenance purposes, upon request of the Company, the customer will be responsible for notifying the Company of the type of digital terminating equipment used.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 7

LIGHTLINK SERVICE

3. Term Discount Plan (TDP)

3.1 A Term Discount Plan (TDP) provides the customer with discounted rates for LightLink Service. The minimum service period is twelve (12) months. LightLink Service may be ordered under a TDP for fixed periods of 12 - 23 months, 24 - 35 months, 36 - 59 months, and 60 - 84 months. Month-to-month rates in this tariff may apply only after the expiration of a TDP. All rate elements within the same LightLink Service facility must be ordered under the same commitment period and under the same service date. The customer must order the TDP in writing to the Company. A TDP may be ordered in one-month increments, (e.g. a 28- month commitment period or a 37-month commitment period).

3.2 The customer must specify the length of the initial service period at the time the service is ordered. When a customer converts to a TDP, Nonrecurring Charges do not apply toward facilities in-service at that time. If a customer converts from month-to-month rates to a TDP or upgrades from one TDP to another, Nonrecurring Charges and Service Charges do not apply.

3.3 At the end of the TDP the customer may subscribe to a new TDP at the prevailing rates set forth in 7. following. If the customer does not select a new TDP, the rates will convert to the prevailing month-to-month rates.

3.4 Rate increases or decreases will automatically be applied to the monthly term plan rates for the remaining term of the TDP. If Company initiated rate increases to any rate element or combination of rate elements causes the charges for the entire LightLink Service under the TDP to increase by 10% or more annually, then the customer may cancel the TDP without incurring termination liability charges provided the customer notifies the Company within 30 days after the effective date of the rate increase.

3.5 The customer can extend TDP commitment periods at any time during the term of the plan, up to a maximum of 84 months. The number of remaining months in the original term plan will become part of the total term in the new term plan.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 8

LIGHTLINK SERVICE

4. Termination Liability Charges

4.1 If a customer under a Term Discount Plan (TDP) disconnects all or a portion of LightLink Service prior to the expiration of the TDP, then a Termination Liability Charge will apply to those services that are disconnected. The Termination Liability Charge will be a one-time charge equal to the sum of 50% of the payments remaining for the rest of the TDP.

4.2 Customers may move Channel Terminations and not be subject to Termination Liability Charges providing the terms of the TDP are maintained. If charges as specified in 1.6 were applied to the service being terminated or moved, any termination or move charges associated with that construction apply, as well as any construction charges at the new location.

4.3 Termination Liability Charges will not apply when a service or rate element under a TDP is disconnected prior to the expiration of a selected service period as a result of a change in tariff jurisdiction and/or a customer requested upgrade to a next generation service offering, under the following conditions:

4.3.1 The service period of the new TDP for the new service offering is a period equal to or exceeding the remaining service period of the disconnected TDP, and

4.3.2 The service orders to install the new service and disconnect the old service are related together, and there is no lapse in service between the installation of the new service and the disconnection of the old service, and

4.3.3 The service orders to install the new service and disconnect the old service are for the same customer at the same location.

4.4 The Company will determine whether the replacement service qualifies as a next generation service offering.

4.5 Nonrecurring charges and Service Charges for the new service will apply according to the requirements of the new service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 9

LIGHTLINK SERVICE

5. Rate Categories

5.1 There are three rate categories which apply to LightLink Service:

- Channel Termination - Channel Mileage - Optional Features and Functions

5.1.1 Channel Termination

The Channel Termination rate category provides for the communications path between a customer designated premises and the Serving Wire Center. Included as part of the Channel Termination is a standard channel interface arrangement which defines the technical characteristics associated with the type of facilities to which the service is to be connected at the point of termination (POT) and the type of signaling capability if any. The signaling capability itself is provided as a part of this rate category. One Channel Termination charge applies per customer designated premises at which the channel is terminated. The charges applicable to the Channel Termination vary based on distance, as set forth in 7.1 following.

5.1.2 Channel Mileage

The Channel Mileage rate category provides for the end office equipment and the transmission channel between the Serving Wire Centers associated with two customer designated premises. Channel Mileage rates are made up of the Channel Mileage Facility (per mile) rate and the Channel Mileage Termination (fixed) rate. Channel Mileage charges are set forth in 7.2.

5.1.2.1 Channel Mileage Facility (Per Mile)

The Channel Mileage Facility (per mile) rate recovers the cost for the transmission path, which extends between the Company Serving Wire Centers and includes primarily outside plant used to provide the facility.

5.1.2.2 Channel Mileage Termination (Fixed)

The Channel Mileage Termination (fixed) rate recovers the cost for end office equipment associated with terminating the facility (i.e., basic circuit equipment and terminations at Serving Wire Centers). The Company applies a 50% billing percentage to the channel mileage fixed rate on jointly owned circuits, and applies 100% on wholly owned circuits. When the Channel Mileage Facility (per mile) is zero (i.e., collocated Serving Wire Centers), neither the Channel Mileage Facility (per mile) rate nor the Channel Mileage Termination (fixed) rate will apply.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 10

LIGHTLINK SERVICE

5. Rate Categories (Continued)

5.1 There are three rate categories which apply to LightLink Service: (Continued)

5.1.3 Optional Features and Functions

Optional Features and Functions may be added to improve the quality or utility to meet the customer’s specific communications requirements. These are not necessarily identifiable with specific equipment, but rather represent the end result in terms of performance characteristics, which may be obtained. These characteristics may be obtained by using various combinations of equipment. Optional Features and Functions that are available include the following:

5.1.3.1 Central Office Multiplexing

DS3 to DS1 - An arrangement that converts a 44.736 Mbps channel to 28 DS1 channels using digital time division multiplexing. Central Office Multiplexing is not available at the customer's premises.

5.1.3.2 Clear Channel Capability (CCC)

Clear Channel Capability (CCC) is an arrangement that alters a DS1/1.544 Mbps signal with unconstrained information bits to meet pulse density requirements outlined in Technical Reference Publications GR-54 and GR-342. This will allow a customer to transport an all zero octet over a DS1/1.544 Mbps channel providing an available combined maximum 1.536 Mbps data rate. This arrangement requires the customer signal at the channel interface to conform to Bipolar with 8 Zero Substitution (B8ZS) line code as described in Technical Reference Publications GR-54 and GR-342.

CCC is provided on DS1/1.544 Mbps channels of a LightLink Service facility between two customer designated premises and is subject to the availability of facilities. This optional feature may be ordered at the same time the LightLink Service channel is ordered, or it may be ordered as an additional feature of an existing LightLink Service channel.

5.1.3.3 Multiplexed Service Connection

A Multiplexed Service Connection is an arrangement that allows one DS1 channel of a multiplexed Company service to be connected to one DS1 channel with like signaling of another Company service. For example, the lesser speed may be an ISDN-PRI DS1 channel connected between a multiplexed DS3 service. A Multiplexed Service Connection will be provided at all Company locations where Central Office Multiplexing is performed.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 11

LIGHTLINK SERVICE

6. Application of Rates

6.1 Each LightLink Service facility may be comprised of one or two Channel Terminations. Where both customer premises are served by the same Serving Wire Center, the service will consist of two Channel Terminations. Where each customer premises is served by different Serving Wire Centers, the service will consist of two Channel Terminations, one Channel Mileage Termination (fixed) and the Channel Mileage Facility (per mile) between Serving Wire Centers. Where one customer premises is involved, the Channel Termination of a lower bandwidth service can be replaced with a LightLink Service Channel Termination. For example, the Channel Termination associated with ISDN-PRI Service, referred to as an ISDN-PRI Primary Rate Access Line, can be replaced with a LightLink Service Channel Termination to connect the ISDN-PRI Service to the Serving Wire Center of the customer's designated premises.

6.2 The Channel Termination rate element for LightLink Service will vary based on distance. The mileage used to determine the monthly rate for Channel Terminations located outside a Company central office is the airline distance between the customer’s designated premises and the Company's Serving Wire Center. The mileage measurement is determined by utilizing exchange maps and mileage tables located in designated Company offices for such purposes.

6.3 Intraexchange channels furnished between Company central offices will be charged at rates based on airline distance between the central offices. Interexchange channels will be charged at rates based on airline distance between Company central offices. Fractional mileage will be rounded up to the next full mile.

6.4 Whenever facilities are provided jointly by the Company and another telephone company, the regulations, rates and charges of the other telephone company shall apply for the equipment and facilities furnished by the other telephone company for use in connection with LightLink Service. The Company applies a 50% billing percentage to the Channel Mileage Termination (fixed) rate on jointly owned circuits, and applies 100% on wholly owned circuits. When the Channel Mileage Facility (per mile) is zero (i.e., collocated Serving Wire Centers), neither the Channel Mileage Facility (per mile) rate nor the Channel Mileage Termination (fixed) rate will apply.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 12

LIGHTLINK SERVICE

7. Rates and Charges

Nonrecurring Nonrecurring Charge Charge S&E Code Monthly Rate Installation Rearrangement

7.1 Channel Termination - Per Point of Termination

44.736 Mbps Month to Month(1) Within CO PBVDXDL(C01) $1,495.00 N/A $250.00 0-3 miles PBVDXDL(031) 1,795.00 N/A 250.00 Over 3 miles PBVDXDL(3-1) 2,495.00 N/A 250.00

12 - 23 Months Within CO PBVDXDL(C02) 1,195.00 $900.00 250.00 0-3 miles PBVDXDL(032) 1,595.00 900.00 250.00 Over 3 miles PBVDXDL(3-2) 2,295.00 900.00 250.00

24 - 35 Months Within CO PBVDXDL(C03) 1,095.00 800.00 250.00 0-3 miles PBVDXDL(033) 1,495.00 850.00 250.00 Over 3 miles PBVDXDL(3-3) 2,195.00 850.00 250.00

36 - 59 Months Within CO PBVDXDL(C04) 1,045.00 700.00 250.00 0-3 miles PBVDXDL(034) 1,445.00 800.00 250.00 Over 3 miles PBVDXDL(3-4) 2,045.00 800.00 250.00

60 - 84 Months Within CO PBVDXDL(C05) 945.00 500.00 250.00 0-3 miles PBVDXDL(035) 1,345.00 600.00 250.00 Over 3 miles PBVDXDL(3-5) 1,945.00 600.00 250.00

(1) Month-to-month rates are available only after the expiration of one of the Term Discount Plans.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 13

LIGHTLINK SERVICE

7. Rates and Charges (Continued)

Nonrecurring S&E Code Monthly Rate Charge

7.2 Channel Mileage

7.2.1 Termination (Fixed) - Per Circuit

44.736 Mbps Month to Month1 PBVDXF1(TD3) $875.00 N/A 12 - 23 Months PBVDXF1(T31) 850.00 $0.00 24 - 35 Months PBVDXF1(T32) 825.00 0.00 36 - 59 Months PBVDXF1(T33) 815.00 0.00 60 - 84 Months PBVDXF1(T35) 795.00 0.00

7.2.2 Facility (Per Mile)

44.736 Mbps Month to Month(1) PBVDXM1(031) 150.00 N/A 12 - 23 Months PBVDXM1(032) 135.00 0.00 24 - 35 Months PBVDXM1(033) 120.00 0.00 36 - 59 Months PBVDXM1(034) 110.00 0.00 60 - 84 Months PBVDXM1(035) 100.00 0.00

(1) Month-to-month rates are available only after the expiration of one of the Term Discount Plans.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 14

LIGHTLINK SERVICE

7. Rates and Charges (Continued)

Nonrecurring S&E Code Monthly Rate Charge

7.3 Optional Features and Functions

7.3.1 Central Office Multiplexing DS3 to DS1 - Per Arrangement Month to Month(1) PR3H3MB(MM) $475.00 N/A 12 – 23 Months PR3H3MB(T31) 475.00 $150.00 24 – 35 Months PR3H3MB(T32) 475.00 150.00 36 – 59 Months PR3H3MB(T33) 475.00 150.00 60 – 84 Months PR3H3MB(T35) 475.00 150.00

7.3.2 Clear Channel Capability (CCC) - Per Channel Termination PR3CCC(LL) 0.00 275.00

7.3.3 Multiplexed Service Connection - Per DS1 PBVDMAS 8.00 55.00

(1) Month-to-month rates are available only after the expiration of one of the Term Discount Plans.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Digital Link Service of Texas dba Embarq Section 8 Original Sheet 15

LIGHTLINK SERVICE

7. Rates and Charges (Continued)

7.4 Nonrecurring Charge

The Installation Nonrecurring Charge is applicable for the initial installation of a Channel Termination to a given Serving Wire Center. The Rearrangement Nonrecurring Charge is applicable for any rearrangement of an existing Channel Termination.

7.5 Move Charges

A Move Charge applies for Channel Terminations moved to a new location, even when moved on the same premises. The Move Charge is equal to the Channel Termination Installation Nonrecurring Charge and applies in addition to the Primary Service Order Charge located in Section 4, Service Charges, of the General Customer Services Tariff.

7.6 Service Charges

A Primary Service Order Charge as set forth in Section 4, Service Charges, of the General Customer Services Tariff is applicable per customer request. Nonrecurring Charges specified in this tariff section are in lieu of all other Service Charges.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Dataphone Digital Service of Texas dba Embarq Index Original Sheet 1

INDEX SECTION 1 SHEET REGULATIONS

1. Definitions ...... 1-3 2. Description of Service ...... 4-7 3. Connections ...... 7-10 4. Undertaking of the Telephone Company ...... 11-13 5. Obligations of the Customer ...... 14 6. Payment Arrangements and Credit Allowances ...... 15-19 7. Distance Learning and Information Sharing Program Discounts ...... 19-20

SECTION 2

RATES

1. General ...... 1 2. Channels Between Digital Cities ...... 1 3. Digital Access Lines in Digital City Serving Areas ...... 1-2 4. Multi-Station Arrangement ...... 2 5. Secondary Channel Capability ...... 2 6. Maintenance of Service Charge ...... 2

SECTION 3

DIGITAL CITY SERVICE AREAS ...... 1-18

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF

Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 1

REGULATIONS

1. Definitions

accessories Devices which are mechanically attached to, or used with, the facilities furnished by the telephone company and which are independent of, and not electrically, acoustically, or inductively connected to, the conductors in the communications path of the telephone company facilities.

bit The smallest unit of information in the binary system of notation.

channel - A path (or paths) for electrical communication, between two or more stations furnished in such manner as the telephone company may elect, whether by wire, radio or a combination thereof and whether or not by means of a single physical facility or route.

composite data service - The combined use of terminal and customer-provided data switching equipment with the use of communications services of the telephone company by a composite data service vendor to perform data switching for others.

composite data service vendor - A customer that has been certificated by the proper state or municipal regulatory body, and/or the Federal Communication Commission under section 214 of the Communications Act of 1934, as amended, to acquire and operate facilities to perform data switching for others. A customer shall be classified as a composite data service vendor only with respect to use of those exchange services which are used for the provision of composite data service.

customer - The person, firm or corporation which orders service and is responsible for the payment of charges and compliance with the telephone company regulations. A customer for DATAPHONE Digital Service must have a communication requirement of his own for its use, except where:

- the customer is a composite data service vendor; or

- the service is provided for the transmission of communications relating directly to the business of a subsidiary corporation over which the customer exercises control through ownership of more than 50% of the voting stock; or

- the customer for DATAPHONE Digital Service orders the addition of service points to meet the communications requirements of a user of such service and such additional service points are required to extend the transmission of communications to (or from) the DATAPHONE Digital Service for which the customer has a communications requirement of his own.

communications system - Channels and other facilities which are capable, when not connected to DATAPHONE Digital Service, of two-way communications between terminal equipment.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 2

REGULATIONS

1. Definitions (Continued)

data switching - As used in connection with composite data service, denotes the switching of data (non-voice) messages by the interchange, controlling and routing of data messages between two or more stations, via communications facilities, in which the information content of the message remains unaltered.

digital access line - A path for digital transmission furnished within the serving area of a digital city between a telephone company digital serving central office or NRS hub and the customer's or user's premises.

digital city - A city in which a telephone company digital serving central office is located and serves a specific geographic area for DATAPHONE Digital Service.

digital city serving area - A specific geographic area served in and around a digital city.

digital serving central office - For DATAPHONE Digital Service is a specified geographical location in a digital city from which mileage measurements are determined for the application of channel and digital access line mileage rates.

duplex - An operation which permits customers or users to communicate in both directions simultaneously.

intraLATA service - DATAPHONE Digital Service where service point locations are all within the same LATA.

LATA - Local Access and Transport Area (LATA) denotes a geographic area established for the administration of telecommunications service. It encompasses designated local operating telephone company exchanges which are grouped to serve common social, economic and miscellaneous purposes.

move - As used in connection with the application of move charges for DATAPHONE Digital Service, denotes a change in the physical location (whether on the same or different premises), when made at the request of the customer without discontinuance of service, of facilities and items of equipment provided by the telephone company.

Network Reconfiguration Service (NRS) - A central office-based service which permits customers to remotely reconfigure their dedicated networks without going through normal telephone company service order procedures.

Network Reconfiguration Service hub (NRS hub) - Designated telephone company serving wire center where NRS is provided. An NRS hub may be collocated with a telephone company-designated digital hub, but not all digital hubs are designated as NRS hubs. NRS hub locations are specified in the National Exchange Carrier Association Inc. Wire Center Information Tariff (NECA Tariff).

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 3

REGULATIONS

1. Definitions (Continued)

other participating carrier-provided communications systems - The facilities provided by an "other participating carrier" to its customer which are capable, when not connected to DATAPHONE Digital Service, of communications between customer-provided terminal equipment.

patron - As used in connection with composite data service, denotes a subscriber to the data switching services of a composite data service vendor.

premises - - All portions of the same building occupied by the same customer, provided that:

The portions are not separated from each other by intervening offices, rooms or suites not occupied by the customer.

The portions on different floors are contiguous and that the portion on the upper floor is directly above the portion occupied on the lower floor.

- All of the buildings occupied by the same customer, provided that:

All of the buildings are located on the same continuous property, which is owned and/or leased by the same customer, and are not separated by a public highway.

Note: A public highway is a government-owned vehicular thoroughfare.

secondary channel capability - An enhancement that provides additional capacity on DATAPHONE Digital Services for use as a lower speed (secondary) channel through which the customer has the capability of performing functions such as on-line diagnostics, data monitoring, traffic measurements and network configuration management.

station - When used in connection with DATAPHONE Digital Service, denotes a point on a customer's or user's premises, or a telephone company designated hub, at which a digital access line is terminated.

user - A person, firm, or corporation designated by the customer as a "user" of a DATAPHONE Digital Service furnished to the customer and who may share such service with the customer under the provisions set forth in Section 2.5.2. A user must be specifically named in the customer's application for service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 4

REGULATIONS

2. Description of Service

2.1 General

DATAPHONE Digital Service is a service for the transmission of digital signals using only digital transmission facilities.

DATAPHONE Digital Service provides for the simultaneous two-way transmission of digital signals at synchronous speeds of 2.4, 4.8, 9.6, or 56 kilobits per second (kbps).

The service is furnished for duplex operation on a twenty-four hour per day, seven day per week basis, for a minimum period of one month.

The service is guaranteed to provide an average performance exceeding 99.5% error-free seconds up to the point of interconnection of the channel for operation at all speeds offered in this tariff. When a DATAPHONE Digital Service is operating at an error performance level which is unsatisfactory to the customer or user and it is determined by the telephone company that the error performance level is below that specified above, the period of substandard performance will be considered an interruption and a credit allowance will be made under the provisions of Section 6.6. All such credit allowances shall begin from the time of notice by the customer or user to the telephone company that an unsatisfactory performance level has occurred, provided that the customer promptly releases the service as requested by the telephone company to perform testing and maintenance.

Customer-provided terminal equipment, customer-provided derivation equipment, customer-provided communications systems and other participating carrier-provided communications systems may be connected with facilities furnished for DATAPHONE Digital Service when such connections are made as in Section 3.

The service options available to the customer are:

2.1.1 Two-Station Service

This offering may consist of digital access lines furnished in the same digital city serving area for intraLATA service between two stations.

2.1.2 Multi-Station Service

This offering may consist of digital access lines furnished in the same digital city serving area for intraLATA service between three or more stations.

The number of two-point channels that may be specified for a given digital service may be limited by operating and transmission factors.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 5

REGULATIONS

2. Description of Service (Continued)

2.2 Digital Cities and Serving Areas

2.2.1 Digital Cities

DATAPHONE Digital Service provides transmission paths for digital transmission at synchronous speeds of 2.4, 4.8, 9.6 and 56 kbps within digital serving areas of the following cities:

Austin, Texas

Dallas, Texas

Houston, Texas

San Antonio, Texas

Area codes and central office codes designating the specific digital serving areas to which service is available are as described in Section 3.

2.2.2 Digital City Serving Areas

In a digital city serving area, DATAPHONE Digital Service as furnished under this tariff is available only to stations located in the territory of the telephone company central offices specified in Section 3. Stations which are normally served by means of baseband transmission from a telephone company digital serving central office or NRS hub require a type 1 digital access line. Stations outside the serving range of baseband transmission from a telephone company digital serving central office or NRS hub require a type 2 digital access line.

The area codes and the codes of those telephone company central offices to which service is available and the type of digital access line required for each station are listed in Section 3.

2.3 Determination of Mileages

When stations located in a digital serving area require type 2 digital access lines, the digital access line mileage is based on the mileage distance between the telephone company digital serving central office or NRS hub and the telephone company central office serving such stations as set forth in Section 3.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 6

REGULATIONS

2. Description of Service (Continued)

2.4 Service Components

The basic components for DATAPHONE Digital Service are described in Sections 2.4.1 through 2.4.3.

2.4.1 Digital Access Lines in Digital City Serving Areas

The types of digital access lines offered for transmission in a digital city serving area are:

(A) Type 1 - Digital access lines furnished for digital transmission at synchronous rates of 2.4, 4.8, 9.6 or 56 kbps serve stations inside the normal serving range of baseband transmission from a telephone company digital serving central office or NRS hub.

(B) Type 2 - Digital access lines furnished for digital transmission at synchronous rates of 2.4, 4.8, 9.6 or 56 kbps to serve stations outside the normal serving range of baseband transmission from a telephone company digital serving central office or NRS hub.

The rates for digital access lines are as set forth in Section 2.

2.4.2 Multi-Station Arrangement

A multi-station arrangement is required to provide for DATAPHONE Digital Service between three or more digital stations on the same and/or different premises located in digital city serving areas.

The rate for a multi-station arrangement is in Section 2.

2.4.3 Secondary Channel Capability

This arrangement provides for a secondary channel which operates at a speed equivalent to one- third of the primary channel speed. This secondary channel operates independently from, but over the same physical facility as the primary channel, and is normally used by the customer for performing network management operations such as on-line diagnostics, data monitoring, traffic measurements and network configuration management.

Secondary channel capability is available on point-to-point or multi-point services which use non- repeatered digital access lines. Secondary channel capability can only be provided at a digital service hub for DATAPHONE Digital Service.

Complementary customer-provided terminal equipment must be coupled with this service.

The rate for secondary channel capability is in Section 2.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 7

REGULATIONS

2.5 Use

2.5.1 General

DATAPHONE Digital Service may be used for the transmission of communications to (or from) any station on the service.

2.5.2 Shared Use

(A) A user must have a station on the service and the station must be located on the premises of the user and connected to the service by means of a separate digital access line, except that these requirements do not apply to a user of a service with respect to his use of digital bit streams created by customer (or user) - provided derivation equipment, provided the customer or user has a station on the line connected to such equipment as in Section 3.2.2.

(B) A communications common carrier, who is a customer for DATAPHONE Digital Service, may not enter into a shared use arrangement between itself and others.

(C) The telephone company shall not be responsible for the manner in which the use of service will be allocated. Orders which involve the start, rearrangement, release, or discontinuance of service will be accepted by the telephone company only from the customer.

(D) The charges for DATAPHONE Digital Service shall be determined as provided in this tariff and all charges for the service will be billed to the customer.

2.5.3 Unlawful Use

The service furnished under this tariff shall not be used for any purpose or in any manner directly or indirectly in violation of the law or in aid of any unlawful act or undertaking.

2.5.4 DATAPHONE Digital Service may be terminated in a channel port of an NRS found in Section 8 of the Digital Link Service Tariff. Additional rates for channels between digital cities may be required to route the DATAPHONE Digital Service to an NRS hub location.

3. Connections

3.1 General

Terminal equipment, derivation equipment and communications systems may be connected to DATAPHONE Digital Service provided by the telephone company when such connection is made as in Section 3.2.

The connection of a DATAPHONE Digital Service furnished by the telephone company to another DATAPHONE Digital Service or to other services furnished by the telephone company may be made as in Section 3.3.

All connections as provided for in Sections 3.2 and 3.3 shall be made through equipment furnished by the customer or user. The responsibility of the telephone company shall be limited to the furnishing of service to that point on the customer's or user's premises where provision is made for the connection of such equipment. The customer or user is responsible for testing its equipment or facilities to insure that when they are connected with DATAPHONE Digital Service such equipment or facilities are operating properly.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba CenturyLink Section 1 1st Revised Sheet 8 Cancels Original Sheet 8

REGULATIONS

3. Connections (Continued)

3.1 General (Continued)

The customer shall be responsible for payment of a maintenance of service charge, as set forth in Section 2 for each repair visit by a telephone company employee to the premises of the customer or user where the service difficulty or trouble report results from the use of equipment or facilities provided by the customer or user.

The responsibilities of the customer and the responsibilities of the telephone company are further set forth in Sections 3.5 and 3.6, respectively.

3.2 Connection of Terminal Equipment, Derivation Equipment and Communications Systems

3.2.1 The customer or user, by use of its own derivation equipment, may create digital bit streams from a DATAPHONE Digital Service and such equipment may be connected at the customer's or user's premises for the transmission of such bit streams to facilities furnished for Private Line Service, DATAPHONE Digital Service, Local or Long Distance Message Telecommunications Service (D) furnished under the regulations of the telephone company's tariffs. (D)

3.2.2 The customer shall be responsible for providing any required digital network channel terminating equipment (NCTE). The undertaking of the telephone company is to furnish DATAPHONE Digital Service as ordered and specified by the customer up to the point of interconnection.

3.2.3 Unless a specific waiver has been granted by the FCC, or except as otherwise provided in 3.2.4 following, all connections of registered equipment to services furnished by the telephone company will be made through a point of interconnection. In most cases, this will be through a telephone company provided jack. In the case of a registered communications system utilizing complex wiring, a method of connection, jacks, terminal strips, etc., will be provided by the telephone company.

3.2.4 The requirement for the use of standard jacks as described in 3.2.3, preceding, is waived for registered equipment which is located in hazardous or inaccessible locations.

3.3 Connection to Other Services Furnished by the Telephone Company to the Same Customer or Different Customers

A DATAPHONE Digital Service furnished by the telephone company to a customer may be connected by the customer or user at the premises of the customer or user to another DATAPHONE Digital Service or to other services furnished by the telephone company as specified below.

3.3.1 Private line channels of the following types furnished under the regulations of the telephone company's Private Line Services Tariff.

(A) Voice grade data channels entrance facilities (B) Entrance facilities

3.3.2 Exchange lines.

3.4 Accessories

Accessories provided by customers or users may be used with DATAPHONE Digital Service provided that such accessories comply with Section 3.5.

ISSUED: December 10, 2018 EFFECTIVE: March 1, 2019 TX 18-04 INTRALATA SERVICES TARIFF

Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 9

REGULATIONS

3. Connections (Continued)

3.5 Responsibility of the Customer

3.5.1 Where DATAPHONE Digital Service is available under this tariff for use in connection with terminal equipment or communications systems provided by a customer or user, the operating characteristics of such equipment or systems shall be such as not to interfere with any of the services offered by the telephone company. Such use is subject to the further provisions that the equipment of a customer or user does not endanger the safety of telephone company employees or the public; or damage, require a change in or the alteration of the equipment or other facilities of the telephone company; interfere with the proper functioning of such equipment or facilities; impair the operation of telephone company facilities or otherwise injure the public in its use of telephone company services. Upon notice from the telephone company that the equipment provided by a customer or user is causing or is likely to cause such hazard or interference, the customer shall take such steps as shall be necessary to remove or prevent such hazard or interference.

3.5.2 Where a customer elects to connect a communications system to DATAPHONE Digital Service, the customer shall be responsible for:

(A) Compatibility of the connected communications system to DATAPHONE Digital Service. This includes the replacing of NCTE due to technological changes in the network.

(B) Testing, sectionalization, and clearance of trouble conditions or service difficulties on any communications system which is connected to DATAPHONE Digital Service.

3.5.3 The consent of the customer must be obtained by the authorized user prior to the connection of authorized user-provided terminal equipment or communications systems to a DATAPHONE Digital Service provided to the customer.

3.6 Responsibility of the Telephone Company

3.6.1 The telephone company shall not be responsible for the installation, operation, or maintenance of any terminal equipment, communications systems or premises wiring provided by a customer or user. DATAPHONE Digital Service is not represented as adapted to the use of such equipment or system and where such equipment or system is connected to telephone company facilities, the responsibility of the telephone company shall be limited to the furnishing of facilities up to the point of interconnection suitable for DATAPHONE Digital Service and to the maintenance and operation of such facilities up to the point of interconnection in a manner proper for such digital service. Subject to this responsibility, the telephone company shall not be responsible for (i) the through- transmission of signals generated by such equipment or system, or for the quality of, or defects in such transmission, or (ii) damage to terminal equipment or communications systems provided by a customer or authorized user due to testing.

3.6.2 The telephone company shall not be responsible to the customer or user, if changes in any of the facilities, operations or procedures of the telephone company used in the provision of DATAPHONE Digital Service render any facilities provided by a customer or user obsolete or require modification or alteration of such equipment or system or otherwise affect its use or performance.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 10

REGULATIONS

3. Connections (Continued)

3.6 Responsibility of the Telephone Company (Continued)

3.6.3 The telephone company undertakes to maintain and repair during normal working hours the facilities which it furnishes hereunder. The customer or user may not rearrange, disconnect, remove, or attempt to repair any equipment installed by the telephone company without prior written consent of the telephone company.

3.7 Violation of Regulations

Where any terminal equipment or communications system provided by a customer or user is used with services furnished by the telephone company and any of the provisions in Section 1, 3. are violated, the telephone company will take such immediate action as necessary for the protection of its facilities, and will promptly notify the customer of the violation. The customer shall take such steps as are necessary to discontinue such use of the equipment or system, or correct the violation and shall confirm in writing to the telephone company within 10 days, following the receipt of written notice from the telephone company, that such use has ceased or that the violation has been corrected. Failure to discontinue such use or to correct the violation and to give the required written confirmation to the telephone company within the time stated above shall result in suspension of the customer's service until such time as there is compliance with the provisions of this tariff.

3.8 Connection of Network Channel Terminating Equipment

Effective January 2, 1986, per the FCC's Memorandum Opinion and Order on CC Docket 81-216, (FCC 85-564), Part 68 of the FCC's Rules and Regulations (Registration Program), was amended to provide for inclusion of NCTE for direct connection to subrate and high capacity digital services. The following dates and regulations were established:

3.8.1 Grandfathered equipment - Terminal equipment, including its premises wiring and protective apparatus (if any) and multiline terminating systems that were directly connected to subrate digital services on January 2, 1986, may remain connected and be reconnected to such digital services for life without registration, unless subsequently modified.

3.8.2 Interim installations - An interim program established by the FCC allowed for connection of terminal equipment, including premises wiring and protective apparatus (if any) to be installed (including additions to existing systems) up to June 30, 1987, without registration of any terminal equipment involved, provided that this terminal equipment is of a type directly connected to subrate or 1.544 mbps digital services as of January 2, 1986, or they appeared on the interim program summary for approved equipment. Any equipment connected under this interim program may require modification at the owner's expense in response to Part 68 of the rules as adopted.

3.8.3 Registered only equipment - Any terminal equipment connected to subrate digital services after June 30, 1987 must comply with the Registration Program. The equipment must also comply with the requirements of Technical Reference Publications 62411 and/or 62310.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 11

REGULATIONS

4. Undertaking of the Telephone Company

4.1 Limitations

4.1.1 The use and restoration of service shall be as in Part 64 Subpart D of the FCC's Rules and Regulations which specifies the priority system for such activities.

4.1.2 The furnishing of service under this tariff will require certain physical arrangements of the facilities of the telephone company and is therefore subject to the availability of such facilities.

4.1.3 DATAPHONE Digital Service may be limited to comply with orders issued under wartime authority of the President of the United States.

4.2 Liability

4.2.1 In view of the fact that the customer has exclusive control of his communications over the facilities furnished him by the telephone company, and of the other uses for which facilities may be furnished him by the telephone company, and because of unavoidableness of errors incident to the services and to the use of such facilities of the telephone company, the services and facilities furnished by the telephone company are subject to the regulations herein specified.

4.2.2 The telephone company's failure to provide or maintain facilities under this tariff shall be excused by labor difficulties, governmental orders, civil commotions, acts of God and other circumstances beyond the telephone company's reasonable control, subject to the interruption allowance provisions of this tariff.

4.2.3 The telephone company's liability, if any, for its gross negligence or willful misconduct is not limited by this tariff. With respect to any other claim or suit, by a customer or any others, for damages arising out of mistakes, omissions, interruptions, delays or errors, or defects in transmission occurring in the course of furnishing service hereunder, the telephone company's liability, if any, shall not exceed an amount equivalent to the proportionate charge to the customer for the period of service during which such mistake, omission, interruption, delay, error, or defect in transmission or service occurs and continues. This liability shall be in addition to any amounts that may otherwise be due to the customer under this tariff as an allowance for interruptions. However, any such mistakes, omissions, interruptions, delays, errors, or defects in transmission or service which are caused or contributed to by the negligence or willful act of the customer, authorized user, or joint user, or which arise from the use of customer-provided facilities or equipment shall not result in the imposition of any liability whatsoever upon the telephone company.

4.2.4 The telephone company shall be indemnified and saved harmless by the customer or user against:

(A) claims for libel, slander and infringement of copyright arising from the material transmitted over the facilities;

(B) claims for infringement of patents arising from combining with, or using in connection with, facilities furnished by the telephone company, apparatus and systems of the customer or user; and

(C) all other claims arising out of any act of omission of the customer or user in connection with the facilities provided by the telephone company.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 12 REGULATIONS

4. Undertaking of the Telephone Company (Continued)

4.2 Liability (Continued)

4.2.5 The Telephone Company will not be liable for any consequential, incidental or indirect damages for any cause of action, whether in contract or tort. Consequential, incidental and indirect damages include, but are not limited to, lost projects, lost revenues and loss of business opportunity, whether or not the Telephone Company was aware or should have been aware of the possibility of these damages.

4.2.6 The Telephone Company does not guarantee nor make any warranty with respect to equipment provided by it for use in an explosive atmosphere. The customer or user indemnifies and holds the Telephone Company harmless from any and all loss, claims, demands, suits, or other action, or any liability whatsoever, whether suffered, made, instituted or asserted by the customer or user or by any other party or persons, for any personal injury to or death of any person or persons, and for any loss, damage or destruction of any property, whether owned by the customer or others, caused or claimed to have been caused directly or indirectly by the installation, operation, failure to operate, maintenance, removal, presence, condition, location or use of said equipment so provided.

The Telephone Company will require each customer to sign an agreement for the furnishing of such equipment as a condition precedent to the furnishing of such equipment.

4.2.7 The Telephone Company is not liable for any defacement of or damage to the premises of a customer (or user) resulting from the furnishing of channel facilities or the attachment of the instruments, apparatus and associated wiring furnished by the Telephone Company on such premises or by the installation or removal thereof, when such defacement or damage is not the result of negligence of the agents or employees of the Telephone Company.

4.2.8 The Telephone Company shall in no way be liable for any harm or any damages arising in connection with any failure by the customer to properly bond or ground a mobile premises or any mobile structure in which service is to be provided (e.g., boats, RVs and mobile homes), as well as equipment and associated wiring located on the customer's side of the point of interconnection at any premises, whether fixed or mobile.

4.2.9 The Telephone Company will make reasonable efforts to cure any material failure to provide service caused solely by year 2000 defects in the Telephone Company hardware, software or systems. Due to the interdependence among telecommunications providers and the interrelationship with non-Telephone Company processes, equipment and systems, the Telephone Company is not responsible for failures caused by circumstances beyond its control including, but not limited to, failures caused by: 1) the Customer; 2) other telecommunications providers; or 3) customer premises equipment. In addition, the Telephone Company does not ensure compatibility between the Telephone Company and non-Telephone Company services used by the Customer.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 13

REGULATIONS

4. Undertaking of the Telephone Company (Continued)

4.3 Provision of Facilities

4.3.1 A point of interconnection is provided as part of the DATAPHONE Digital Service.

4.3.2 DATAPHONE Digital Service furnished by the telephone company will be furnished at the rates contained in this tariff, provided the necessary facilities are available. Area codes and central office codes designating specific digital serving areas are those in Section 3. Where facilities are not available, and unusual expenditures are involved in making them available, the customer may be required to pay additional charges to cover the unusual expenditure, or to contract for service beyond the initial period, or both.

4.3.3 The charges specified in this tariff do not contemplate work being performed by the telephone company employees involved at a time when overtime wages apply, due to the request of the customer, nor do they contemplate work once begun being interrupted by the customer.

If the customer requests labor be performed at hours of the day or days of the week other than normal work hours or days, or on holidays, or interrupts work once begun; an additional charge based on the additional costs involved applies. Such charges do not apply if sufficient advance notice is given so that employees' work schedules can be changed and it is agreeable to the telephone company. The additional charge does not apply to overtime or premium time work at the telephone company's expense.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 14

REGULATIONS

5. Obligations of the Customer

5.1 The customer shall be responsible for:

5.1.1 damages to facilities of the telephone company caused by the negligence or willful act of the customer or users;

5.1.2 reimbursing the telephone company for any loss through theft of its equipment or apparatus on the customer's or user's premises;

5.1.3 the provision of the power required to operate telephone company facilities installed on the premises of the customer or users;

5.1.4 the provision, installation and maintenance of sealed conduit with explosive-proof fittings between equipment furnished by the telephone company in explosive atmospheres and points outside the hazardous area where connection may be made with regular facilities of the telephone company, and may be required to install and maintain the telephone company equipment within the hazardous area if, in the opinion of the telephone company, injury or damage to the telephone company employees or property might result from installation or maintenance by the telephone company;

5.1.5 obtaining permission for the telephone company agents or employees to enter the premises of the customer or user at any reasonable hour for the purpose of installing, inspecting, repairing or upon termination of the service, removing the facilities of the telephone company.

5.1.6 bonding and/or grounding a mobile premises or any mobile structure in which service is to be provided or used (e.g., boats, RVs and mobile homes), as well as any equipment and associated wiring on the customer's side of the point of interconnection at any premises, whether fixed or mobile.

5.2 Ownership

Equipment, instruments and lines on customer's premises, furnished by the telephone company, shall be and remain the property of the telephone company, whose agents and employees have the right to enter said premises at any reasonable hour for the purpose of installing, inspecting, maintaining or repairing the equipment, instruments and lines for the purpose of making collections from coin boxes, and upon termination of the service, for the purpose of removing such equipment, instruments and lines.

5.3 Transfer of Rights or Obligations

The service or any rights associated therewith may not be assigned or in any manner transferred.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 15

REGULATIONS

6. Payment Arrangements and Credit Allowances

6.1 Payment of Charges and Deposits

6.1.1 The customer is responsible for payment of all charges as specified in this tariff for services furnished the customer or user. Nonrecurring charges are payable upon request.

A one-time penalty as allowed per P.U.C. SUBST. R. §26.27(a) will be applicable on any bill not received by the telephone company or at the telephone company's authorized payment agency by the next bill date. For purposes of applying the penalty, the due date shall be extended to the first following business day if it would otherwise fall on a weekend or holiday. No penalty shall be assessed on federal, state, or local government bills. The penalty shall not be applied to any balance to which the penalty was applied in a previous billing. The one-time penalty shall only apply on undisputed amounts or if the dispute is resolved in favor of the telephone company.

6.1.2 If billing for telephone company services is found to differ from the telephone company's tariffed rates, or if the telephone company fails to bill the customer for such services, a billing adjustment will be calculated by the telephone company. If the customer is due a refund, an adjustment shall be made for the entire period of the overcharges. If an overcharge is adjusted by the telephone company within three billing cycles of the bill in error, interest is not applicable. However, if an overcharge is not adjusted by the telephone company within three billing cycles of the bill in error, interest shall be applied to the amount of the overcharge as specified in P.U.C. SUBST. R. §26.27(a). The rate of interest is set annually by the Commission for a twelve month period and is based on an average of prime commercial paper rates for the previous twelve month period. (1)

(1) The rates of interest to be paid on customer deposits in accordance with Texas Utilities Code Annotated §183.003 (Vernon 1998), and on overbillings or underbillings per P.U.C. SUBST. R. §26.27(a), are established annually on December 1 for the subsequent calendar year by the Commission, as reflected in the Order Setting Interest Rates included in this tariff.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 16

REGULATIONS

6. Payment Arrangements and Credit Allowances (Continued)

6.1 Payment of Charges and Deposits (Continued)

6.1.3 The telephone company, in order to safeguard its interests, may require an applicant or customer for service to make a deposit to be held by the telephone company as a guarantee of the payment of charges. Such deposit will be equivalent to up to two months' charges for the service except that, where the service involves equipment to which charges are applicable for discontinuance of use prior to the expiration of a specified period, the deposit will include an additional amount not to exceed the maximum charge applicable for such discontinuance of use, as provided in this tariff. The fact that a deposit has been made in no way relieves the applicant or customer from complying with Section 6.1.4 and the prompt payment of bills on presentation. At such time as the service is terminated the amount of the deposits is credited to the customer's account and any credit balance which may remain is refunded. Simple interest set annually by the Commission at the rate of not less than six percent per annum or greater than twelve percent per annum will be paid on deposits. {1} Payment of the interest to the customer shall be annually if requested by the customer, or at the time the deposit is returned or credited to the customer's account. The deposit shall cease to draw interest on the date it is returned or credited to the customer's account.

An applicant for service, or a present customer may satisfy a deposit requirement by providing a contract of guaranty in an amount not less than the requested deposit, from a present customer acceptable to the telephone company. The guaranty contract shall be on a form provided by the telephone company which shall include the telephone company's right to transfer charges from a defaulted bill to the customer, from whom a deposit or a contract of guaranty was required, to the guarantor's account or accounts and the further right to suspend the guarantor's service per Section 6.1, Payments for Service.

The fact that a deposit has been made or a guaranty provided, shall in no way relieve the customer from complying with the telephone company's regulations as to the prompt payment of bills, nor constitute a waiver or modification of the regular practices of the telephone company providing for the temporary suspension of service or the termination of the service contract for nonpayment of bills.

A transfer of service from one premises to another within the service area of the telephone company shall not be deemed a disconnection within the meaning of these rules, and no additional deposit may be demanded unless permitted by these rules.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 17

REGULATIONS

6. Payment Arrangements and Credit Allowances (Continued)

6.1 Payment of Charges and Deposits (Continued)

6.1.4 Applicants for service who do not have an account with the telephone company or whose financial responsibility is not a matter of general knowledge, may be required to make an advance payment at the time an application for service is placed with the telephone company, equal to the nonrecurring charges (if applicable) and at least one month's charges for the service provided. The amount of the advance payment is credited to the customer's account as applying to any indebtedness of the customer for the service furnished.

When the customer has paid bills for service for 12 consecutive residential billings or for 24 consecutive commercial or industrial billings without having service disconnected for nonpayment of bill and without having more than two occasions in which a bill was delinquent, and when the customer is not delinquent in the payment of the current bills, the telephone company shall promptly and automatically refund the deposit plus accrued interest to the customer in the form of cash or credit to a customer's bill.

6.2 Cancellation for Cause

The telephone company may discontinue the furnishing of DATAPHONE Digital Service ten days after written notice to the customer, per P.U.C. SUBST. R. §26.28(b) upon:

(A) nonpayment of any sum due the telephone company or

(B) a violation of any condition governing the furnishing of service.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 18

REGULATIONS

6. Payment Arrangements and Credit Allowances (Continued)

6.3 Minimum and Fractional Rates and Charges

6.3.1 The minimum period for which service is furnished and for which charges are applicable is one month, unless otherwise specified.

6.3.2 When the computed charge includes a fraction of a cent, fractions of one-half cent or more are treated as one cent and fractions of less than one-half cent are disregarded.

6.3.3 The charges for a fractional part of a month which follows and is consecutive with a full month will be a proportionate part of the monthly charge using the same ratio that the actual number of days service is furnished bears to 30 days. The actual number of days service is furnished is computed as follows:

(A) The applicable charges for a DATAPHONE Digital Service, or any component thereof, including additions to an existing service, shall commence on the day after service is furnished and will continue to accrue through and include the day on which such service is discontinued.

(B) When an existing DATAPHONE Digital Service, or any component thereof, is changed or rearranged at the request of the customer without the addition of equipment, access lines or channels, any revision in charges necessitated thereby shall commence on the same day that the change or rearrangement is completed.

6.4 Cancellation of Application for Service

6.4.1 Where the applicant cancels an application for service prior to the start of installation, no charge applies.

6.4.2 Where installation of facilities has been started prior to the cancellation, the charge specified in (A) or (B) following (whichever is lower) applies.

(A) A charge equal to the estimated costs incurred in such installation, less estimated net salvage.

(B) The charge for the minimum period of the service order by the customer as provided in this tariff, plus the full amount of any termination charges applicable.

6.4.3 Installation of facilities for a customer is considered to have started when the telephone company incurs any expense in connection therewith or in preparation therefore which would not otherwise have been incurred provided:

(A) The customer has advised the telephone company to proceed with the installation, or

(B) The telephone company has advised the customer that, per his order, it is commencing the installation.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 19

REGULATIONS

6. Payment Arrangements and Credit Allowances (Continued)

6.5 Suspension of Service

Upon request of the customer, service will be suspended without cancellation at any time after the initial one month of service, subject to (A) and (B) following:

(A) Service will be suspended for a period of not less than two weeks.

(B) Billing shall continue at the full rate.

6.6 Allowance for Interruptions

In the event a customer's service is interrupted other than by the negligence or willful act of the customer, and it remains out of order for eight normal working hours or longer after access to the premises is made available and after being reported to be out of order, appropriate adjustments or refunds shall be made to the customer. The amount of adjustment or refund shall be determined on the basis of the known period of interruption, generally beginning from the time the service interruption is first reported. The refund to the customer shall be the pro rata part of the month's flat rate charges for the period of days and that portion of the service facilities rendered useless or inoperative. The refund may be accomplished by a credit on a subsequent bill for telephone service.

6.7 Special Charges, Fees and Taxes

There shall be added to the customer's bill for service an additional charge equal to the pro rata share of any occupation, franchise, business, license, excise, privilege or other similar charge or tax, now or hereafter imposed upon the gross receipts or revenue of the telephone company by any municipal taxing body or municipal authority whether by statute, ordinance, law or otherwise, and whether presently due or to hereafter become due.

The tax applicable to each customer will appear separately on the customer's regular monthly bill and shall be determined on a basis equal to the tax levied by each municipal taxing body or authority. The customer's pro rata share of such taxes shall be computed by dividing the tax expressed as a percentage by 100% minus the tax expressed as a percentage and multiplying the decimal thus obtained by the customer's service charges to which such tax applies as reflected by the following formula:

Tax % x Service Charges Subject to Tax = Amount of Charge to 100% - Tax % Customer.

7. Distance Learning and Information Sharing Program Discounts

Upon submission of an affidavit that complies with the requirements of P.U.C. SUBST. R. §26.141 and HB2128, an educational institution or library may obtain a 25 percent discount on the tariffed rate for any tariffed service that is used predominantly for distance learning or information sharing programs.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 1 Original Sheet 20

REGULATIONS

7. Distance Learning and Information Sharing Program Discounts (Continued)

"Distance learning" means instruction, learning and training that is transmitted from one site to one or more sites by telecommunications services that are used by an educational institution predominantly for such instruction learning or training, including video, data, voice and electronic information.

"Educational institution" means and includes: (a) accredited primary or secondary schools owned or operated by state and local governmental entities or private entities; (b) institutions of higher education as defined by Section 61.003, Education Code; (c) private institutions of higher education accredited by a recognized accrediting agency as defined by Section 61.003 (13), Education Code; (d) the Central Education Agency, its successors and assigns; (e) regional education service centers established and operated pursuant to Sections 11.32 and 11.33, Education Code; and (f) the Texas Higher Education Coordinating Board, its successors and assigns.

"Library" means a "public library" or "regional library system" as those terms are defined by Section 441.122, Government Code, or a library operated by an institution of higher education or a school district.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 2 Original Sheet 1

RATES

1. General

The rates and charges specified in this section apply for all services involving telephone company digital city serving areas.

2. Channels Between Digital Cities

The rates set forth below apply for each two-point channel section furnished between digital city rate centers listed in Section 3 or between a digital city rate center listed in Section 3 and an NRS hub. NRS hub designations are found in the National Exchange Carrier Association's Wire Center Information Tariff.

Monthly For Transmission Class of Fixed Rate Per Speed of: Service Charge Mile USOC

2.4 kbps DPNKS $ 41.30 $ .80 1L7E4 4.8 kbps DPNMS 82.65 1.25 1L7F4 9.6 kbps DPNQS 123.15 1.90 1L7G4 56 kbps DPNSS 255.75 8.25 1L7H4

3. Digital Access Lines in Digital City Serving Areas

The rates set forth below apply for each type 1 and type 2 digital access line terminated at stations in digital city serving areas or in an NRS hub.

3.1 Type 1

For Transmission Class of Monthly Nonrecurring Speed of: Service Charge Charge USOC

2.4 kbps DPNKL $ 97.70 $ 218.25 DDB 4.8 kbps DPNML 138.20 218.25 DDE 9.6 kbps DPNQL 189.65 218.25 DDF 56 kbps DPNSL 375.20 291.00 DDG

3.2 Type 2

Monthly For Transmission Class of Fixed Rate Per Nonrecurring Speed of: Service Charge Mile Charge USOC

2.4 kbps DPNKL $ 149.15 $ 1.25 $ 218.25 1L7A4 4.8 kbps DPNML 189.65 1.90 218.25 1L7B4 9.6 kbps DPNQL 230.25 2.70 218.25 1L7C4 56 kbps DPNSL 478.10 12.35 291.00 1L7D4

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 2 Original Sheet 2

RATES

3. Digital Access Lines in Digital City Serving Areas (Continued)

3.3 Move Charges

When a digital access line is moved to a new location on the same premises, one-half the nonrecurring charge applies.

When a digital access line is moved to a new location on a different premises, the nonrecurring charge applies.

4. Multi-Station Arrangement

When a DATAPHONE Digital Service is arranged for multi-station operation, the following charge applies in addition to other charges in this tariff:

Monthly Charge USOC

$ 31.20 DDZ

Multi-station service is described in Section 1 Paragraph 2.1.2.

5. Secondary Channel Capability

When a DATAPHONE Digital Service is arranged for secondary channel capability, the following charge applies per digital access line connected on the circuit. This charge is in addition to other charges in this tariff:

For Transmission Monthly Nonrecurring Speed of Charge Charge USOC

For all speeds $ 9.89 $ 112.00 SCA

6. Maintenance of Service Charge

Maintenance visit charge as specified in Section 1 Paragraph 3.1:

Each visit - $30.00

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 1 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory of central office codes listed below, the rates for digital access lines, equipment and arrangements are as set forth in Section 2. Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 214 421 745 221 18 (1) (V8436) (H4034) 426 746 222 15 428 747 223 15 464 748 224 11 521 749 225 11 522 760 226 14 526 761 227 13 528 767 228 11 559 820 231 11 565 821 233 11 573 823 234 11 651 824 235 11 653 826 236 (1) 122 (1) 655 827 238 11 658 828 239 11 670 871 241 12 698 880 242 15 720 922 243 12 741 939 245 15 742 954 247 12 744 969 248 15 993 251 10 252 13 253 10 254 10 255 13 256 13 257 13 258 13 259 10 262 13 263 13 264 13 266 13 269 13 270 10 271 13 272 12 276 12 278 13 279 9 285 12 286 11 287 20 288 12 289 12 (1) Obsolete--cannot add to, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 2 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 214 291 17 (V8436) (H4034) 292 28 (Continued) 296 13 297 (1) 119 (1) 298 13 299 17 320 5 321 5 323 18 324 5 327 5 328 5 330 8 331 8 333 8 337 8 339 8 340 7 341 7 343 7 347 31 348 7 349 7 350 6 351 6 352 6 353 6 357 6 358 6 361 5 363 5 367 67 368 5 369 5 370 23 371 7 372 7 373 5 374 7 375 7 376 7 377 26 378 75 380 15 381 6 382 37 385 11 386 11

(1) Obsolete--cannot add to, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 3 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 214 387 11 (V8436) (H4034) 388 6 (Continued) 391 8 392 11 398 8 422 17 423 17 424 17 434 18 436 18 437 11 438 9 445 9 446 15 450 11 453 16 454 47 455 47 456 16 457 47 458 11 462 18 463 68 465 68 471 18 472 20 474 22 484 12 487 12 492 18 494 12 495 15 496 58 530 15 541 15 542 31 556 12 557 11 561 (1) 93 (1) 563 30 566 (1) 97 (1) 570 13 572 (1) 110 (1) 574 (1) 16 (1) 576 19 578 17 579 9 581 (1) 93 (1)

(1) Obsolete--cannot add to, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 4 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 214 583 65 (V8436) (H4034) 592 (1) 92 (1) (Continued) 593 (1) 92 (1) 595 (1) 92 (1) 596 18 597 (1) 92 (1) 620 12 626 105 630 6 631 6 634 6 635 30 637 6 638 6 641 15 642 13 643 (1) 127 (1) 644 11 647 15 659 13 660 15 661 11 663 120 669 11 676 15 681 9 688 6 689 6 690 11 691 5 692 5 696 5 699 11 721 9 722 22 727 23 733 15 736 33 739 5 750 5 753 (1) 122 (1) 757 (1) 122 (1) 758 (1) 122 (1) 759 (1) 119 (1) 775 24 780 13 782 37 783 11

(1) Obsolete--cannot add to, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 5 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 214 784 94 (V8436) (H4034) 785 94 (Continued) 788 11 830 12 837 37 840 13 851 11 856 (1) 108 (1) 867 18 869 12 872 51 874 51 875 33 877 (1) 97 (1) 881 17 882 (1) 84 (1) 888 12 890 5 891 5 892 60 893 60 920 6 924 42 931 15 933 15 934 11 935 (1) 143 (1) 937 27 938 (1) 143 (1) 941 5 942 5 943 5 944 5 946 5 948 5 960 11 980 11 985 18 987 5 988 15 991 11 995 11 996 11 997 11

(1) Obsolete--cannot add to, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 6 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 817 232 33 (V8436) (H4034) 236 40 (Continued) 237 41 244 41 246 39 249 39 261 20 265 20 267 17 268 23 273 20 274 20 275 20 277 20 280 23 281 27 282 23 283 17 284 26 292 36 293 33 294 36 295 35 297 38 322 125 325 77 328 77 332 33 334 33 335 33 336 33 338 33 346 36 355 17 390 33 429 34 430 30 439 36 441 48 443 47 447 35 448 47 451 34 452 20 457 34 460 20 461 20 465 21 467 21 469 20 473 26 477 26 478 27

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 7 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 817 481 20 (V8436) (H4034) 483 27 (Continued) 485 27 488 20 489 43 491 30 493 21 496 34 498 27 531 30 534 30 535 30 536 30 540 17 548 38 549 (1) 107 (1) 551 33 552 (1) 173 (1) 553 (1) 173 (1) 560 41 567 (1) 86 (1) 571 17 572 27 573 63 577 27 588 20 589 26 592 (1) 135 (1) 594 59 595 26 599 59 624 35 625 35 626 35 640 17 641 46 645 46 649 17 654 34 656 27 662 (1) 91 (1) 666 (1) 93 (1) 679 20 691 (1) 126 (1) 692 (1) 126 (1) 723 (1) 125 (1) 731 37 732 37 (1) Obsolete--cannot add to, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 8 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Dallas, Texas 817 733 37 (V8436) (H4034) 735 37 (Continued) 737 37 738 37 752 (1) 86 (1) 753 (1) 86 (1) 754 (1) 86 (1) 755 (1) 86 (1) 756 (1) 86 (1) 761 (1) 125 (1) 763 37 766 (1) 125 (1) 767 (1) 125 (1) 771 (1) 120 (1) 772 (1) 90 (1) 773 (1) 120 (1) 774 (1) 120 (1) 776 (1) 90 (1) 778 (1) 120 (1) 780 (1) 120 (1) 783 36 792 20 794 20 795 20 799 (1) 83 (1) 822 (1) 74 (1) 829 (1) 107 (1) 831 31 834 31 836 (1) 83 (1) 838 31 840 (1) 99 (1) 848 (1) 90 (1) 851 (1) 129 (1) 855 (1) 129 (1) 857 (1) 99 (1) 859 (1) 105 (1) 860 20 863 (1) 79 (1) 870 33 875 (1) 87 (1) 876 (1) 85 (1) 877 33 881 (1) 95 (1) 921 34 922 17 923 34 924 34 926 34 927 34 (1) Obsolete--cannot add to, cannot outside move, cannot supersede.

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 9 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Houston, Texas 713 220 230 16 (V8938) (H3536) 221 232 30 222 235 6 223 251 23 224 255 28 225 256 25 226 259 35 227 266 10 228 270 11 229 271 11 236 277 19 237 280 19 241 284 6 546 285 6 650 288 29 651 292 29 652 320 23 654 332 24 656 333 22 658 337 28 659 338 24 750 341 30 751 342 30 754 350 23 757 351 28 759 353 23 888 356 35 363 29 367 29 370 23 371 28 373 25 376 23 390 3 420 24 422 24 424 21 427 24 428 24 432 6 433 16 434 16 436 12 437 14

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 10 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Houston, Texas 713 438 14 (V8938) H3536) 439 16 (Continued) 440 18 442 10 443 16 444 18 445 12 447 12 448 12 449 10 450 10 451 10 452 15 453 10 454 12 455 10 456 17 457 15 458 12 459 12 460 12 461 10 462 12 463 21 464 10 465 10 466 15 467 10 468 10 469 19 470 22 471 22 472 10 473 10 474 24 475 10 476 15 477 10 479 15 480 19 481 14 482 18 483 19 484 14 485 14 486 19 487 15 488 19

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 11 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Houston, Texas 713 489 18 (V8938) (H3536) 491 19 (Continued) 492 20 493 15 494 19 495 15 496 15 497 15 498 15 499 16 520 3 521 3 522 3 523 3 524 3 525 3 526 3 527 3 528 3 529 3 530 15 531 15 534 28 537 18 541 11 550 21 551 10 552 6 554 24 556 15 558 15 574 28 578 20 580 18 583 18 590 10 591 12 599 6 620 6 621 6 622 6 623 6 626 6 627 6

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 12 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Houston, Texas 713 629 6 (V8938( (H3536) 630 3 (Continued) 631 6 633 6 635 6 640 6 641 6 643 6 644 6 645 6 649 6 660 6 661 6 662 6 663 6 664 6 665 6 666 6 667 6 668 6 669 6 670 5 671 5 672 5 673 5 674 5 675 5 676 5 678 5 679 5 680 8 681 8 682 8 683 8 686 8 688 8 690 10 691 6 692 6 694 6 695 6 697 6 699 6 720 10 721 10 723 10 726 10 728 10 729 10 731 6 733 6 734 6

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 13 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Houston, Texas 713 738 6 (V8938) (H3536) 741 4 (Continued) 747 4 748 4 749 4 771 11 772 11 774 11 776 11 777 11 778 11 780 10 781 10 782 10 783 10 784 10 785 10 788 10 789 10 790 3 791 3 792 3 795 3 797 3 799 3 820 12 821 16 827 10 840 6 841 6 847 12 850 6 859 21 861 4 862 4 864 4 868 4 869 4 870 15 871 6 877 6 879 15 880 4 890 19 893 18 895 12 896 15 920 10 921 4 923 4 924 4 926 4

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 14 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Houston, Texas 713 928 4 (V8938) (H3536) 929 14 (Continued) 930 15 931 12 932 10 933 15 937 15 939 12 940 6 941 11 943 11 944 11 946 11 947 11 951 12 952 10 953 10 954 10 955 19 956 8 957 8 960 6 961 6 965 6 966 6 972 10 973 10 974 10 975 10 977 10 978 10 980 19 981 11 984 10 987 10 988 11 991 10 993 6 995 11 996 18 997 14 998 15 999 12

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 15 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Houston, Texas 409 233 55 (V8938) (H3536) 234 60 (Continued) 238 55 239 55 258 35 265 50 273 34 297 49 299 49 336 40 372 40 539 40 756 40 760 40 865 56 885 48 935 36 938 36 942 36 945 38 948 38

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 16 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage San Antonio, Texas 512 220 278 81 (V9225) (H4062) 221 333 6 222 334 52 223 337 6 224 340 7 225 341 7 226 342 7 227 344 7 228 349 7 229 366 7 230 374 96 231 420 23 246 426 41 270 432 5 271 433 5 299 434 5 435 5 436 5 457 88 468 103 470 10 492 12 493 12 494 12 496 12 497 15 531 2 532 2 533 2 534 2 535 34 536 2 563 117 569 33 621 18 622 16 623 11 625 29 626 18 627 10 629 29 633 10 635 15 647 10 651 16 652 15 653 10 654 10 655 10 656 10 657 10 658 15

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 17 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage San Antonio, Texas 512 659 15 (V9225) (H4062) 661 7 (Continued) 662 7 663 32 667 15 670 11 671 11 673 11 674 11 675 11 677 16 679 17 680 10 681 10 684 10 688 16 690 10 691 10 692 10 694 10 695 18 696 10 698 18 699 10 732 3 733 3 734 3 735 3 736 3 737 3 742 28 751 31 772 24 784 45 796 41 820 4 821 4 822 4 824 4 826 4 828 4 876 104 879 82 922 5 923 5 924 5 925 5 927 5 975 10 988 60 999 101

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007 INTRALATA SERVICES TARIFF Central Telephone Company Dataphone Digital Service of Texas dba Embarq Section 3 Original Sheet 18 DIGITAL CITY SERVING AREAS 1. For service involving stations located in the territory… (Continued) Central Office Code Central Office Code and Mileage Involving Stations Involving Stations SWBT Which Require Which Require Digital Serving Area Type 1 Type 2 Central Office Code Digital Access Lines Digital Access Lines Central Office Code Mileage Austin, Texas 512 397 237 40 (V9004) (H3997) 471 243 12 472 244 17 473 247 12 474 250 14 475 251 14 476 255 17 477 258 14 478 259 13 482 261 16 870 263 13 264 20 266 13 267 20 272 13 282 10 285 24 288 12 321 28 327 5 343 8 345 8 346 8 352 29 385 5 398 27 441 3 442 3 443 3 444 3 446 52 447 3 448 3 451 4 452 4 453 4 454 4 458 4 459 4 556 61 768 75 778 29 834 9 835 9 836 9 837 9 838 9 892 6 926 5

ISSUED: March 5, 2007 EFFECTIVE: April 4, 2007