3Com® IP Telephony Acronyms and Glossary TECHNOLOGY GUIDE ACRONYMS AA DiffServ ITU Auto-Attendant Differentiated Services International Telecommunication Union (www.itu.int) ACD DNIS Automatic Call Distribution Dialed Number Identification IVR Service Interactive Voice Response ADSL Asymmetric Digital Subscriber DSS/BLF Kbps or Kb/s Line Direct Station Selection/Busy Kilobits per second Lamp Field AES KTS Advanced Encryption Standard DTMF Key Telephone System Dual-Tone MultiFrequency ANI LAN Automatic Number Identification E911 Local Area Network Enhanced 911 ANSI LCR American National Standards E&M Least Cost Routing Institute (www.ansi.org) Earth and Magnet (signaling) Mbps or Mb/s API ETSI Megabits per second Application Programming Interface European Telecommunications Standards Institute (www.etsi.org). MIB ATM Management Information Asynchronous Transfer Mode FXO Database B2BUA Foreign eXchange Office Modem Back-to-Back User Agent FXS Modulator/Demodulator BRI Foreign eXchange Subscriber Basic Rate ISDN MOS HTTP Mean Opinion Score CAS Hypertext Transfer Protocol Complement Attendant Software MPLS IEEE Multi-Protocol Label Switching CDR Institute of Electrical and Call Detail Reporting Electronic Engineering NAT Network Address Translations CLI/CLID (www.ieee.org) Calling Line Identification NBX® IETF Network Branch eXchange CO Internet Engineering Task Force Central Office (www.ietf.org) NCP Network Call Processor CoS IM Class of Service Instant Messaging NOS Network Operating System CRM IMAP Customer Relationship Internet Message Access Protocol NPA Management Numbering Plan Area IP CTI Internet Protocol PABX Computer Telephony Integration Private Area Branch Exchange IPS DCA Intrusion Prevention System PAN Desktop Call Assistant Personal Area Network IPsec DES IP Security PBX Data Encryption Standard Private Branch Exchange ISDN DHCP Integrated Services Digital PCI Dynamic Host Configuration Network Peripheral Component Protocol Interconnect DID/DDI ISO Direct Inward Dialing/Direct International Organization of POP3 Post Office Protocol 3 Dialing Inward Standardization (www.iso.org) 1 3COM® IP TELEPHONY ACRONYMS AND GLOSSARY ACRONYMS—continued POTS SMTP VCX™ Plain Old Telephone Service Simple Mail Transfer Protocol Voice Core eXchange PRI SNMP VLAN Primary Rate Interface Simple Network Management Virtual LAN Protocol PSTN VM/MS Public Switched Telephone SRTP Voicemail/Messaging System Network Secure Real-Time Transport Protocol VoIP QoS Voice over Internet Protocol Quality of Service TAPI Telephony Application VPIM RSVP Voice Profile for Internet Mail Reservation Protocol Programming Interface VTL TCP/IP RTP Virtual Tie Line Real-Time Protocol Transmission Control Protocol/ Internet Protocol W3C RTSP World Wide Web Consortium Real-Time Streaming Protocol TLS (www.w3.org) Transport Layer Security SDP WAN Session Description Protocol TSAPI Wide Area Network Telephony Server Application SIP Programming Interface Wi-Fi Session Initiation Protocol Wireless Fidelity UCD SIMPLE Uniform Call Distribution WLAN Wireless LAN SIP Instant Messaging and UDP User Datagram Protocol Presence Leveraging Extensions XML Extensible Markup Language UMTS SMDI Universal Mobile Simplified Message Desk Interface Telecommunications System SMDR (www.umts-forum.org) Station Message Detail Recording 2 3COM® IP TELEPHONY ACRONYMS AND GLOSSARY TERMS 3—C 3G provide dialing instructions for Bridged Appearance Third-generation digital cellular reaching certain users, departments Allows joint management of an mobile standard for delivering or a live attendant. extension by enabling specified high-speed data to mobile devices; phones to simultaneously share a will eventually deliver packet- Auto-Discovery line appearance; typically used in A feature that “discovers” a new based mobile communications as an executive/admin environment telephone or other device on the IP Multimedia Subsystem (IMS) where the admin can see, answer network and provides it with architectures are implemented. and manage calls made to multiple service without specific directions telephones. 802.11a/b/g from a system administrator. Standards for wireless networking Buffer using unlicensed radio spectrum Automatic Call Distribution (ACD) Area in a device for temporary A call management system that for Wi-Fi communications. storage of data in transit; can routes calls to queues so they can accommodate differences in pro- be answered by appropriately Abbreviated Dialing cessing speeds to facilitate a clear Also known as speed dialing, skilled agents. The ACD can transmission between devices by allows a list of frequently called manage individual and groups of storing data blocks until they are numbers to be stored in system ACD agents, as well as recorded ready to be processed by a slower memory and accessed via a two- announcements presented to device. or three-digit code. callers; the software also can provide database reports on both Busy Override Account Codes calls and agents. Allows users to override a busy Allows a phone user to enter an signal to break into an existing account code that will appear in a Automatic Hold Recall conversation; most systems, but record of calls made or received; Allows calls to be placed on hold not all, offer this feature with a codes can be forced or unforced; and recalls the called party if warning tone that is given to all optionally, they can be verified there is no response to the call parties of a current conversation. against an allowed code list within a specified period of time. defined by an administrator. Call Accounting System Auto-Redial Usually an external application to A modem, fax or telephone fea- Ad-hoc Conference a telephony system which merges Conference bridge facility where ture that redials a busy number call detail records with call costs, parties can call a number at any- a fixed number of times before facilitating client and/or depart- time and be placed in conference, disconnecting. mental billing and helping verify sharing a pool of conference ports telephone company bills. with no guarantee of availability; Auto-Relocation A feature that allows a telephone unlike scheduled conferences with to keep its extension number and Call Coverage pre-booked resources; also known Pre-configured routing for calls personal and systems settings at meet-me conferences. which are unanswered by a called when it is connected to a different extension or call forwarding port on the network. Attendant Console rules; frequently configured to A standard telephony device that voice mail. shows the status of each extension Back-to-Back User Agent (B2BUA) A device that follows the rules of in a telephone system, allowing a the Session Initiation Protocol (SIP) Call Detail Record (CDR) receptionist to connect incoming Saved call information relating to —standard RFC3261—for a user calls to the requested destination. number dialed, duration, etc.. agent (client), but relays signaling Authorization Codes (CoS Override) to other clients or proxies; enables Caller Identification Allows phone users to temporarily comprehensive features to be › CLID (Calling Line IDentification): override the configured Class of delivered to SIP clients without indicator on the phone receiving Service (CoS) on a phone and the constraints of being a SIP proxy. a call the caller’s name or phone access additional services by number; Caller ID is a service using their authorization code; Basic Rate ISDN (BRI) that a local phone company or Two-channel ISDN service usable usually enabled by entering a service provider can offer that for voice or data (2 x 64 Kbps). user’s extension number and PIN. displays a CLID. Bit › ANI (Automatic Number Identi- Auto-Attendant (AA) Unit of information within binary An application that answers fication): indicator of caller data data represented by one or zero. incoming calls with a menu of displayed on the phone receiv- options; a recorded greeting may Bluetooth ing the call. When the call is be followed by a transfer to a live Wireless standard for short-range, routed to a PBX via an ISDN attendant or station, or it may device-to-device communications trunk from the public telephone (www.bluetooth.com). network, the caller’s phone 3 3COM® IP TELEPHONY ACRONYMS AND GLOSSARY C—E number (ANI) is automatically Camp-On Busy assistance, allowing easier and processed for future reference. Allows a caller to request an auto- faster access to called parties. › DNIS (Dialed Number Identifi- matic callback from a busy exten- sion when that user is free. Directory Service (on LCD phones) cation Service): indicator of Look-up functionality that allows data about the number called Central Office (CO) users to enter a name or set of that is displayed on the caller’s Term used by service providers characters on a phone’s keypad to phone. When the call is routed for the site that houses the display a needed phone number. to it, the PBX processes the switching equipment for their DNIS for display. public telephony services. Distinctive Ringing A system configuration that iden- Call Forward Circuit Switching tifies callers or their locations by Enables users to arrange for calls A bandwidth allocation method unique ringing patterns; may to be sent to another phone in for using a fixed portion of the also be combined with Personal defined situations; can be imple- network and creating end-to-end Ringing. mented for: connections that are open during › busy calls only the full duration of the communi- Do Not Disturb A feature that prohibits calls from