Communications Standards Review

COMMUNICATIONS STANDARDS REVIEW

Volume 5, Number 1 January, 1994

IN THIS ISSUE The following reports of recent standards meetings represent the view of the reporter and are not official, authorized minutes of the meetings.

ITU-T Study Group 8 Telematic Services, November 16 – 25, 1993, Geneva, Switzerland...... 3 ITU T Study Group 8 Roster, November 16 – 25, Geneva, Switzerland...... 10 TR-30 Data Transmission Systems & Equipment, December 6 – 10, 1993, Orlando, FL...... 11 TR-30.1 Ad Hoc on V.34 Startup...... 11 TR-30.1, Modems...... 12 TR-30.2, Data Transmission...... 13 TR-30.3 Data Communications Network Interfaces...... 14 TR-30.4, DTE-DCE Protocols...... 15 TR-30 Partial Roster, December 6 - 10, 1993, Orlando, FL,...... 18 Documents from IEEE P743 Working Group...... 19 TR-46 Mobile & Personal Communications 1800 MHz Standards December 6-10, 1993, Orlando, FL...... 21 TR-46.1, Services & Network Reference Models...... 21 TR-46.1.1, Service Requirements & Descriptions...... 22 TR-46.1.2, Network Reference Models...... 22 TR-46.2 Network Interfaces...... 22 TR-46.2.1, PCN Signaling...... 22 TR-46.2.2, PCN to PCN Intersystem Operations...... 22 TR-46.2.3, Intersystem Operations Between PCN and non-PCN...... 23 Ad Hoc on PCS at 2100 MHz...... 23 TR-46 Roster, December 6 - 10, 1993, Orlando, FL...... 24 SG 15 Experts Group Meeting on Very Low Bit Rate Visual Telephony, December 7 – 9, 1993, Middletown, NJ....25 Video Group...... 25 Speech Group...... 25 System Group...... 26 Multiplex, Data and Control...... 26 Ad Hoc Committees...... 26 SG 15 Experts Group Meeting Roster, December 7 – 9, 1993, Middletown, NJ...... 27 SG 14 V.34 (“V.fast”) Rapporteurs Meeting, December 13 – 14, 1993, Orlando, Florida...... 28 Working Group Reports...... 29 V.34 Rapporteurs Meeting Roster, December 13 – 14, 1993, Orlando, FL...... 31 TR-45.3, TDMA Cellular Subcommittee, December 13 – 17, 1993, Kihei, HI...... 32 TR-45.3.2, Data Services...... 34 TR-45.3.3, Digital Standards...... 35 TR-45.3.3.1, Matrix...... 35 TTR-45.3.3.5, MS/BS Requirements...... 36 TR-45.3.4, System Performance...... 36 TR-45.3.5, Speech Codecs...... 36 TR-45.3.6, Enhanced Dual-Mode Standards...... 37 TR-45.3 Plenary Roster, December 13 – 17, 1993, Kihei, HI...... 38 TR-45.4 Microcell/Microsystems Standards, December 13-16, 1993, Houston, Texas...... 39 Working Group I - PCS Service Standards...... 39 Working Group II - MSC to BS...... 39

(A-Interface)...... 39 Working Group III - Microcell/Microsystems...... 40 TR-45.4 Roster, December 13 - 16, 1993, Houston, TX...... 41 Acronym Definitions...... 42 1994 Meeting Schedules as of January 21...... 44

TD-0009 and TD-0010 contain the list of documents. TD-0002 is the Guidelines to Rapporteurs and Editors of ITU-T SG 8. TD-0003 contains additional relevant documents for Rapporteurs and editors.

Q1 APPLI/COM (T.611)

J-P. Dick (France Telecom), Rapporteur. Meeting report: TD-2038.

D-121 (editor R. Grundmann, DBT) is the restructured draft of T.611 dated October 24, 1993. This is the baseline document for editing purposes. TD-2015 §§ 3.1, 4.4 and 6.1 are accepted revisions to D-121. A history of the revisions from the T.611 recommendation to this new draft is provided in D-120. Extensions to D-121 for e-mail (COM 8-8 [Rapporteur] and D-78 [DBT]) were accepted. However, the proposal to change CONVERT to TYPE for Multi Body part messages was rejected.

A new parameter, CA-ID, was added (Points 1-4 in D-103 [TR-29, USA]). The need for management functions (point 7 in D-103) was acknowledged and will be supported by management functions as proposed in COM 8-14 (France Telecom). All remaining issues from D-103, including TRACE: PREVIEW, were accepted and will be included in the draft proposed for Resolution 1 procedures in June 1994. The draft T.611 proposed for Resolution 1 will also include extensions for e-mail, posting, polling file transfer, and an improved exchange mechanism.

COM 8-13 (France Telecom) describes the improved exchange mechanism; D-119 (DBT) provides an implementation example. Backward compatibility with T.611 (1992) is maintained. The new functions incorporated are: the alarm, login, logout mechanisms, and the transfer of data from the LA to the CA and vice versa.

A Rapporteurs meeting is planned for February 1994 following the SG 7 meeting.

A total of 31 documents were reviewed: COM 8-5 through -15, COM 8-21 through -26, D-78, D-102, D- 103, D-112, D-118 through D-121, D-125, TD-2001, TD-2004, TD-2014, TD-2015.

Q2 VIDEOTEX SYNTAX

H. Layec (FRANCE Telecom), Rapporteur. Meeting report: TD-3053.

Modifications to T.101 (International Interworking for Videotex Services) were agreed to. TD-3052 shows the modifications approved to Annex F (Videotex Photographic Syntax). The work plan intent is to apply for Res. 1 for T.101 at the next SG 8 meeting.

Q3 OPEN DOCUMENT ARCHITECTURE (ODA)

H. Silbiger (AT&T, USA) Rapporteur. US meeting report: TD-1034.

This work is being done jointly with JTC 1/SC18/WG3 as an ODA Collaborative Team and progress is principally made at joint meetings outside of Geneva. Most of the activity at this meeting concerned the addition of JBIG and JPEG to T.417 (Raster Graphics Content Architecture) (D-82). Some additional attributes are needed, but this work is expected to be completed at the next meeting.

The following drafts are up for Resolution 1 approval at the June 1994 meeting: • Rec. T.413 - Abstract Interface for the Manipulation of ODA Documents (D-20) • Rec. T.421 - Tabular Structures and Tabular Layout (TD-1004) • Rec. T.424 - Temporal relationships and Non-linear Structures (D-126) • Amendment on Sub-profiles to Rec. T.414 / ISO/IEC 8613-4 - Document Profile - Sub-profiles (D-39)

A Q3/SC18 WG3 ODA CT meeting is planned for Helsinki, Finland, June 8 – 17, 1994.

Q4 COLOR FACSIMILE

M. Matsuki (Japan) Rapporteur. Meeting report: TD-2038.

The work on G3 color was initiated by the U.S. (D-100, D-101). D-100 describes a new Annex I to T.30 to enable color transmission and proposes to add continuous-tone image data coded in accordance with Recommendation T.81 (JPEG). JPEG is proposed since the lossy encoding is most useful when using modem transmission rates in G3. D-101 contains the proposed Annex I to Recommendation T.4 with the technical features of continuous-tone gray scale and color image transfer for Group 3.

The work in G4 color has been going on for some time. Originally, both JPEG and JBIG were to be supported. Since the G4 Recommendations are loosely based on ODA, the Raster Graphics content Architecture (T.417) needed to be amended to support JBIG and JPEG encoding. This could not be accomplished before March, 1995. Since G4 did not want to wait for this amendment, a method was devised to bypass the dependency by adding the needed items to the Document application Profile (T.503).

A decision at the Working Party level was made to promote G3-G4 Interoperability. Identical color parameters should be standardized. These points were agreed to after lengthy discussions:

Huffman tables: G4 proponents wanted to use default JPEG Huffman tables, while G3 preferred to always transmit the tables with the image (full JPEG data stream). It was finally agreed that the Huffman tables will always be included with the encoded image, since in some implementations, the data may not be decoded immediately, but off-line from the facsimile terminal. An indication will have to be made whether the included table is a default table. Color Models: There was no disagreement on which color models are to be used. Soft (display) color is to be standardized later. Subsampling ratios: Agreement on subsampling ratios was not attained. G3 proposes 4:1:1, while G4 proposes 4:2:2. The subsampling ratio of 4:1:1 results in a better compression than 4:2:2, although it was claimed that at the resolution of 200x200 ppi the difference in quality is very low. A final decision will be made at the next meeting. Approval for both G3 and G4 color will be sought at the June 1994 meeting. The drafts to be approved are:

• Annex I to Rec. T.4 - Optional continuous-tone gray scale and color image transfer for Group 3 document facsimile apparatus (TD-3046) • Annex E to Rec. T.30 - Procedure for enabling the transmission of continuous tone color images for Group 3 document facsimile apparatus (TD-3047) • Annex B to Rec. T.503 - Extension (to G4 Document Application Profile) for continuous tone color image documents (TD-3024rev. 2) • Annex B to Rec. T.521 - Extension (to G4 Communication Application Profile) for transfer of continuous tone color image documents (TD-3037) • Amendments to Rec. T.563 (G4 Terminal Characteristics) to support color image documents (TD-3036rev. + TD-3036add.) • Rec. T.colour - Continuous tone color representation method for facsimile (TD-2067).

Q5 FACSIMILE GROUP 3

B. Revillet (Canon, France) Rapporteur. Meeting report: TD-3069rev.

A Rapporteurs meeting with Q4 and Q9 experts is planned for February, 1994.

Security: Work done at this meeting yielded a draft Recommendation T.faxsec. The current draft is essentially an outline of a Recommendation, and contains a table on security services and levels of service (TD-3069rev. Appendices 2 and 3).

New negotiation procedures: Some concern is being expressed about the ever increasing length of the DIS/DTC table and negotiation at 300 bits/sec. France called for a halt to the addition of new features until a new procedure was agreed upon, but it was finally agreed to continue with the current method until a new method has been finalized so that no market opportunities would be lost. No agreements on a new method were reached at the meeting.

Miscellaneous: The maximum scan line time as defined in Rec. T.4 was extended to 13 sec. Clarifications were made to the specification of simple mixed mode. ITU-T adoption of Class 2: The U.S. had submitted a proposed draft T.class2, which was a combination of the TIA Class 2 (TIA 592) and Packet Protocol Standards (TIA 605) (COM 8-26). An additional contribution contained material to bring it in line with the 1993 version of T.30 (D-102). It was agreed that SG 8 would adopt this work. A request was made for a white contribution to the next meeting which would bring the draft up to date. An early approval of this work is expected. J. Decuir (Microsoft) will be the editor of this work. Database access: Access to databases using facsimile was seen as necessary to increasing the penetration of facsimile into the home. To aid in the polling type of operation of fax terminals, some clarifications in the meaning of certain bits in the DIS are needed. In the DIS, bit 9 indicates that there is a document available in the called terminal. It is not a capability indication. Bit 10 means that the terminal has Group 3 receiving capability. In the DCS, bit 9 is undefined, and bit 10 is a command to the called terminal to enable Group 3 mode. In the DTC, bit 9 is presently undefined, but may be used to indicate that the calling terminal is willing to accept a turnaround. Bit 10 has the same definition as in the DIS. These definitions will enable easy automation of requests for documents from a database. The problem that databases may have relatively long delays in responding while searching for a document was identified. The calling terminal should be prevented from timing out in such cases. A new command called “WAIT” may be needed to reset the timers.

The use of Polling mode in file transfer was clarified when using bits 51 through 65.

Diagnostic Messages: At the final meeting of the 89-92 period, the syntax of the BFT diagnostic messages was deleted from Rec. T.30, because it was seen as inappropriate. Unfortunately, it was not standardized in some other place. There is demand for the diagnostic message facility, and it is expected that this problem will be addressed at the next meeting.

Use of characters in SEP, SUB, PWD: A Japanese contribution (D-77) proposed the use of the characters ‘#’ and ‘*’ in the SEP (Selective Polling), SUB (Subaddress) and PWD (Password) fields. This was agreed upon, and is up for approval in June 1994.

Group 3C (64 Kbit/sec.): The interworking procedures with Group 4 were finally agreed upon. (D-84, D-87, TD-3030).

Facsimile testing: This subgroup on Conformance testing is being led by A. Giuseppini (Italy). The group agreed on the following mandate: • Identify and solve terminal incompatibility problems • Interface with SG 12 • Study facsimile malfunctions, links between the malfunctions and the characteristics of the network • Propose precautions to be taken to limit any malfunctions with current terminals • Propose modifications of the T.4 and T.30 Recommendations in order to avoid future terminal malfunctioning

Terminal selection: TD-3026 (L. McIntyre, Xerox, USA) is the proposal from the Florence interim meeting to finalize T.30 Annex D. This proposal defines two profiles: 1) a 6.4 sec CNG detection period prior to OGM1 or holding signal (not defined); answer tone is issued after 1.8 - 2.5 seconds, and 2) OGM1 is issued 1.8-2.5 seconds after answer and is shorter than 15 seconds. Since TD-3026 was not submitted as a White or Delayed contribution it could not be considered at this meeting. A proposal was generated (J. Brownlie representing Rockwell, USA, and J.L. Grimault, France Telecom) on the subject of improved terminal selection using V.8. (TD-3070). This suggests that CI and CNG be transmitted alternatively when the answering equipment capabilities are not known. The use of the Calling Signal (CNG) was made mandatory for both manual and automatic operation, subject to approval at the June 1994 meeting.

Patent policy: Ricoh, Matsushita, Toshiba and NEC have indicated that they have patents that pertain to Annex D of T.30 (Terminal Selection). These companies did not indicate this prior to approval, in violation of the ITU

January, 1994 Vol. 5.1 Copyright © CSR 1994 5 COMMUNICATIONS STANDARDS REVIEW patent policy. There were frequent discussions on patent policy during the meeting, especially in connection with the use of the almost completed V.34 and V.8 modem Recommendations for facsimile. Patent issues remain a thorny problem at the ITU.

Q6 FACSIMILE TEST CHARTS AND DOCUMENTS

D. Bodson (USA) Rapporteur. Meeting report: TD-3055rev.

The new Rec. T.colour-chart containing a color test chart was approved at this meeting (COM 8-32). The draft Rec. T.test-images was proposed for approval at the June 1994 meeting. The intention is to publish this Recommendation on a CD-ROM. The test chart Recommendations T.20 and T.21 will be withdrawn since they have been superseded by Rec. T.22.

Q7 PROTOCOL ASPECTS OF INTERACTIVE VIDEOTEX

K. Sambor (Austria) Rapporteur. Meeting report: TD-3045.

The new draft Recommendation T.107 (Videotex Enhanced Man Machine Interface Service) (COM 8-29 and TD- 3039) is proposed for Res. 1 at the next meeting of SG 8, as is T.105 (Syntax-based Videotex Application Layer Protocol) (TD-3041 and TD-3043).

Q8 DOCUMENT TRANSFER AND MANIPULATION (DTAM)

H-D. Schulz (DBP Telekom, Germany) Rapporteur. Meeting report: TD-1032rev.

Progress was made on the drafts of Rec. T.435 and T.436 (Service Descriptions and Protocols for Document Manipulation). These will be up for approval in June 1994. (T.435: D-96, DT-49; T.436: D-95, DT-49, DT- 50). Work in this Question will continue to support Cooperative Document Handling, Audiovisual Interactive and Audiographics Conferencing applications. Progress was also made on the use of DTAM protocols in the ISO Document Filing and Retrieval Standard (TD-1022). A Rapporteurs meeting is planned for Barcelona, Spain, March 7-9, 1994.

Q9 GROUP 4 FACSIMILE

T. Endo (KDD, Japan) Rapporteur. Meeting report: TD-3064.

The main work items included color model for G4 facsimile, coding scheme for G4 color facsimile, coding scheme for binary images, file transfer, security, G4 class structure and T.image-file. It was decided that the Document Application Profile (T.50x) for color facsimile would be an annex to T.503 rather than a separate Recommendation. It was agreed that the revised version of T.563 (TD-3036rev. and TD-3036add.) would be submitted for Resolution 1 procedures in June 1994. There was no agreement to follow the same procedure for the new annex to T.503 (A document application profile for the interchange of G4 facsimile documents, TD-3024rev2) or the revised T.521 (Communications application profile BT0 for document bulk transfer, based on session service, TD- 3037).

Q10 AUDIOGRAPHIC CONFERENCING

B. DeGrasse (BJ Communications, USA) Rapporteur. Meeting report: TD-2064rev.

B. DeGrasse was accepted as Rapporteur after N. Starkey (DataBeam, USA) indicated he would not continue. Electronic drafts of documents are available from anonymous FTP site ftp.cfer.com directory ConferTech and the WorldLinx bulletin board +1 416 890-3524.

Draft Recommendation T.125 (TD-3028, MCS Protocol Specification) was accepted for Resolution 1 procedures. T.123, which was approved in March 1993, contains defects (see COM 8-17). It was agreed to postpone publication until corrections are adopted under Resolution 1 at the June SG 8 meeting. Final text will be completed in February 1994. T.122 (MCS Service Definition), previously approved but omitted from the meeting report, was accepted for Resolution 1 with final text (TD-2053). Work on T.124 (Generic Conference Control) continued. (D-

89 is the draft that was the basis for the meeting’s work.) The MCU requirements for memory to hold diverse databases have not been estimated. The requirement for bandwidth control has not been agreed upon. D-111 (J. Boucher, BT Labs, UK) states the requirements for applications which intend to function within a GCC and MCS environment.

A liaison to SG 1 on reservation response procedures, TD-2057, provides a good description of the user interface to the conference reservation system.

T.SI (Still Image Conferencing Application) work continued. The objective is to finalize T.124 and T.SI for submission as White contributions in June 1994 for approval in March 1995.

The issue of simplex protocols for use on LSD and HSD with SG 15 is still not resolved. TD-2003 is the liaison from SG 15 indicating the addition to H.DLL of an MLP Compatibility Mode. It includes some details of operation. TD-2058, a liaison from SG 8 back to SG 15, supports this direction subject to additional details being developed. Interest in using T.120 rather than a different H.DLL in H.320 systems is developing .

In response to questions, no patents were identified that apply to T.120 series Recommendations.

Q11 PROTOCOLS FOR INTERACTIVE AUDIOVISUAL SERVICES (AVI)

J. Fromont (CCETT, France) Rapporteur. Meeting report: TD-1027.

This work is being done in cooperation with JTC1/SC29/WG12, MHEG (Multimedia and Hypermedia Experts Group). The first draft Rec. from this Question is up for approval in June 1994: T.171, Coded representation of multimedia and hypermedia information (TD-1016). Progress was also made on T.172, Description of AVI scriptware functions. T.171 describes the presentation of multimedia information, while T.172 describes its temporal sequences. A new Rec. T.401 will be drafted to describe a common ODA-MHEG environment. A Q11/SC29/WG12 meeting is planned for February 23-24, 1994 in Rennes, France. Q 12 CONVERSION RULES P. Talone (Fondazione Bordoni, Italy) Rapporteur, was unable to attend; G. Russo from the same organization acted as interim Rapporteur. Meeting report: TD-2036. Three participants attended the meeting. The interim Rapporteur requested the delegates review the draft Recommendation on Document Conversion. Q13 TELEMATICS ON THE ISDN M. E. Jones (BT, UK) Rapporteur. Meeting report: TD-3071. The amendments to Rec. T.90 (Terminal characteristics and protocols for telematic services over ISDN), T.4 and T.30 to support G3C (G3 over ISDN), G3F (G3 UDI over ISDN) and G4 interworking, were proposed for approval at the June 1994 meeting. D-84 records the agreed changes, with an editorial correction in TD-3030. D-84 also provides an interworking chart which shows that G3C-only and G3F-only equipment do not interwork and that G4- only equipment does not interwork with G3C. The report from the joint meeting of SG 7 and SG 8 on OSI protocol efficiency is in TD-3021. TD-3018 (SG 7) is the report of the October 1993 meeting of SG 7, Q19 on the efficiency of OSI protocols. It describes a number of possibilities to enhance protocol efficiency both during connection establishment and transmission. However, it will be some time before any changes to ISO standards can be expected. Q14 ODA APPLICATION PROFILES P. Bourges (SEPT, France) Rapporteur. Meeting report: TD-1023rev. This Question had only two attendees at the meeting. Work was done only on aligning the ITU-T versions of the International Standardized Profiles for ODA FOD 11 (T.502) and FOD 26 (T.505) with JTC 1 versions. These will be approved in June 1994.

Q15 COOPERATIVE DOCUMENT HANDLING T. Tanaka (NTT, Japan) Rapporteur. Meeting report: TD-1037. This is a new Question this study period and is gaining a lot of interest. The concept is also known as “Work Flow” in the U.S. Rec. T.56a, Application Profile for Document Conferencing and Remote Presentation, has been drafted (TD-1012). Q16 COMMON COMPONENTS FOR IMAGE AND AUDIO COMMUNICATION I. Sebestyén (Siemens, Germany) Rapporteur. Meeting report: TD-2022rev. This Question deals mainly with the JPEG and JBIG coding methods. D-63 (Japan), on the use of default Huffman tables, presents test results on photographic images using three different Huffman tables. The differences in compression achieved are very small. Therefore, the committee proposed that the JPEG-recommended Huffman tables be used as default in color facsimile using T.81. D-64 and D-65 supporting the use of JBIG for color were discussed. No actions were taken, since it was felt these mainly concerned color fax. The draft Rec. T.83, JPEG Conformance testing (TD-2012) has been proposed for approval in June 1994.

Q17 CODING OF ALPHANUMERIC CHARACTERS

J. Fuchs (Bezeq, Israel) Rapporteur. Meeting report: TD-2060rev. Rec. T.53 was approved at this meeting. This Recommendation defines the character coded control functions and their coded representation for use in 7-bit and 8-bit coded ITU-T Telematic Services. T.53 specifies control functions to handle bi-directional texts in character-imaging devices. The bi-directional concept is an addition to the uni- directional device concept which was the base for the former ITU-T Recommendations and ISO/IEC standards. It means that the control functions which were modified to meet the bi-directional requirements can be used for uni- directional devices, as before (COM 8-33, TD-2043). T.52 (non-Latin Coded Character Sets for Telematic Services), which was approved in March 1993, was clarified by a note to § 7.6.1.f stating that the character greek small letter final sigma is not included in the Japanese set (D-69).

Q 18 TELETEX G. Stoye (DBT, Germany) Rapporteur. Q18 did not meet.

Q19 MODULATION TECHNIQUES (FAX MODEMS)

Glen Griffiths (Rockwell, US) Rapporteur. Meeting report: TD-3062Rev.

G. Griffiths was accepted as Rapporteur, replacing B. DeGrasse who moved to be Rapporteur of Q10.

While there was much discussion in this Question on the use of V.8 and V.34 in Group 3 fax, very little was accomplished. Much time was spent on discussing patent issues. A liaison was sent to SG 14 (TD-3061rev. 2) requesting: 1. The draft Recommendation V.34 (V.fast) 2. The draft Recommendation V.8 (V.id) 3. A list of existing and pending patents and their patent holders. For each patent holder, identify as specifically as possible, which parts of V.34 or V.8 are covered by each patent. Also identify a contact person for each patent holder for the purpose of negotiating royalties and license fees. The V.34 Rapporteur’s group was also reminded in TD-3061rev. 2 that SG 14 has agreed that the V.34 Recommendation is being developed for use in facsimile as well as other applications. If it is not appropriate for SG 8 applications, then it will not be used in T-Series Recommendations. The effect of these concerns could be to delay the implementation of V.34/V.8 in G 3 facsimile until late 1995. The Q19/8 Rapporteurs group plans to meet with the V.34 experts (SG 14) in February 1994 in the U.S.

There were also some questions about the robustness of negotiation at 1200 bits/sec. relative to the currently used V.21 modulation.

D-104 (G. Griffith Rockwell, USA) presents a typical protocol sequence of V.34 half-duplex with estimated timing. This work suggests V.34 fax start-up timing would be 4.667 seconds (with round trip delay of .060 sec.); between page timing would be .454 sec. with the same round trip delay.

Q 20 GENERAL ARCHITECTURE OF PROGRAM-MING COMMUNICATION INTERFACES (PCIS ) N. Guedalia (Bezeq, Israel) Rapporteur. Meeting report: TD-3023rev.

The initial requirements identified were that the architecture should take into consideration the foreseen evolution of services and should allow backward compatibility to existing services, speed of operation and simplicity. Reference work includes F.581, ETSI general architectures for PCIs (in development) and ISO RM-ODP (in development).

Q 21 DESCRIPTION AND SPECIFICATION OF A PCI FOR TERMINAL EQUIPMENT CONNECTED TO THE ISDN N. Guedalia (Bezeq, Israel) Rapporteur. Meeting report: TD-3023 Rev.

The Japanese delegation presented information regarding FRAPI-A, an ISDN architecture that is currently in use in Japan. D-68 is an overview of FRAPI. D-68 notes that as long as common protocols are used for communications, different APIs can exist at each end of the system. The committee agreed to adopt the European ISDN PCI specification as a basic document. P. Lequeux (ZTI, France) will be the editor. This specification conforms to the European ISDN protocol stack. Contributions were solicited for changes/additions necessary to adapt it to other ISDN protocol versions. Herman Silbiger

ITU T STUDY GROUP 8 ROSTER, NOVEMBER 16 – 25, GENEVA, SWITZERLAND

123 delegates were present from 22 countries (TD-0015):

Australia 1 Austria 2 Canada 3 China 2 Denmark 1 Estonia 1 France 18 Germany 11 Greece 1 India 1 Indonesia 2 Israel 3 Italy 6 Japan 24 Korea 1 Netherlands 1 Russia 2 Spain 1 Thailand 2 Tunisia 1 United Kingdom 7 USA 23 Plus Intelsat 1 ISO 7 TSB 1

Communications Standards Review regularly covers the following committee meetings:

TIA (USA): TR-29 TR-45 TR-30 TR-46 TR-41 ITU TS: SG 8 SG 15 / 1 (CCITT) SG 14 (Formerly SGXVII)

10 Vol. 5.1 Copyright © CSR 1994 January 1994 COMMUNICATIONS STANDARDS REVIEW REPORT OF TR-30 DATA TRANSMISSION SYSTEMS & EQUIPMENT DECEMBER 6 – 10, 1993, ORLANDO, FL Note: All of the documents submitted to the meetings of TR-30.1 and TR-30.1 ad hoc were also submitted to the V.34 Rapporteurs meeting (see report in this issue). For purposes of clarification, documents will be listed in this report under their TR-30.1 numbers, and in the V.34 Rapporteurs meeting report under both sets of document numbers. TR-30.1 AD HOC ON V.34 STARTUP

PHASE 2

TR-30.1ah/93-12-078 (R. Goodson, UDS) proposes five modifications to the startup procedure: 1. The reordering of the INFO1a bits to be more consistent with the ordering of INFO1c 2 A method for generating the CRC 3 A specific Barker sequence for the synch word proceeding the INFO sequence 4 The mapping of J3 bits in a manner similar to a V.32 rate-sequence 5 An increase in the number of bits in the S sequence to allow for more time to adjust modem parameters. Points 2 and 4 were accepted by the committee. It appears that point 1 was based on an earlier draft of V.8.

TR-30.1ah/93-12-079 (L. Brown, Motorola-Codex) discusses five possible recovery mechanisms for errored V.34 INFO sequences. The paper draws no conclusions as to which is best, although a preference for Option 4 (error free operation and operation when either modem misses INFO0) was verbally stated during the presentation. An additional scenario with intervening CME is also presented for Option 4. No decisions were made.

TR-30.1ah/93-12-081 (J. Brownlie, BT plc) proposes shifting the end-to-end parameters from the INFO sequences to the CM/JM exchanges. The parameters chosen are: async/synch interfacing, seamless/interruptive rate changing and assignment of the secondary channel. Some of these features are not presently included in the Draft Recommendation).

There was no agreement on whether more time would be expended using the CM/JM sequences versus using INFO0 to carry this information. The sub-issues related to the new features described in TR-30.1ah/93-12-081 were also pointed out. The chairman suggested that the issue of the 40 msec end-to-end superframe would be better pursued in the TR-30.1 Data Mode discussions.

PHASE 4

TR-30.1ah/93-12-073 (K. Jones, Telebit) addresses the exchange of rate sequences. It proposes a new signal called a RATERQ (Rate Request). Under this proposal the modems exchange two 17-bit RATERQ sequences indicating the maximum bit rate supported. The modems default to the lowest of the maximum rates specified. In addition to the rate information, the RATERQ sequences contain bits to implement a Secondary Channel request, a Trellis encoder request, a Non-linear encoder request, a Shaping request, as well as providing information on the precoder tap values. This sequence also includes an ACK bit. Both modems must have received a RATERQ with its acknowledgment bit set before proceeding to the last E signal. TR-30.1ah/93-12-073 includes complete text to incorporate this proposal in the Draft Recommendation.

TR-30.1ah/93-12-077 (R. Goodson, Motorola-UDS) builds on the concept introduced in TR-30.1ah/93-12- 073, providing the details of the 4 and 16 point constellations, the differential encoder, the scrambler and the CRC generator. It also changes the RATERQ sequence to a 20-bit sequence and redefines the E sequences.

TR-30.1ah/93-12-080 (J. Brownlie, BT plc) purports to show all of the information presently contained in Phases 2 through 4 of the start-up procedures on one diagram. It shows these Phases on a connection involving CME in order to highlight the differences between modem-to-modem as opposed to end-to-end information exchanges. It also provides a second diagram which shows a proposed non-interruptive (seamless) rate change negotiation.

During discussion, it was pointed out that this paper included a change (agreed to) from 600 bit/s to 1200 bit/s (proposed in half-duplex training) for INFO0 exchanges. It was decided to have a group work off-line to develop a concrete proposal for the Rapporteurs meeting.

This paper was introduced a second time during the next day’s session, this time highlighting the seamless rate change. There was an extended discussion about the need for a seamless rate change. The chair proposed acceptance of some agreements that had been reached off-line over the evening. The group agreed. These agreements are shown in the report of the V.34 Rapporteurs meeting in this issue of CSR:

TR-30.1ah/93-12-074 (K. Jones, Telebit) proposes a scheme for rapid rate negotiation and re-synchronization. There was considerable discussion following this presentation.

TR-30.1ah/93-12-075 (K. Jones, Telebit) proposes a retrain procedure using two new signals: ARMc and ARMa, which are the MARK conditions of the INFO0c and INFO0a respectively. The modems return to PHASE 2 (transmit INFO0 ) upon receipt of 100 ms of an ARM signal. During the discussion, it was pointed out that a silent period would be required before the transmission of INFO0 .

With essential agreement on the above two Telebit proposals, the question of a CLEAR DOWN signal was raised as the last open item. This brought up the concern over how many ways to escape from DATA MODE would be accomplished. It was decided to initially use the rapid cleardown mechanism based on rapid rate renegotiation, understanding that it may be appropriate to use another signal in V.8 (for 64 clear) which may be added in the future.

OTHER BUSINESS

TR-30.1ah/93-12-076 (S. Olafsson, Rockwell) introduces a procedure for fast startup of the control channel. It proposes the use of four 8-symbol sequences repeated eight times.

TR-30.1ah/93-12-082 (J. Brownlie, BT plc) proposes the inclusion of an indicator of data volume (for a given session) in an extension of the call function indicator in V.8. There was considerable discussion about what information needs to be exchanged. However, the drafting of specific text was put off until the Rapporteurs meeting the following week.

TR-30.1ah/93-12-083 (J. Brownlie, BT plc) proposes some changes to V.8 to accommodate fax/tel switching. In particular, a single AI signal is sent from a CI capable device which also supports telephone (voice) functions to inform voice callers to continue on the line and to alert the calling device that the answering device has CI capability which would speed terminal selection. Although it was presented for information only, considerable discussion followed, with several members of the group expressing reservations.

TR-30.1, MODEMS

D. Brandt (AT&T), TR-30 chair, briefly reviewed the new guidelines for the conduct of TR-30 committee meetings which included that all liaisons will be written.

G. Griffith (Rockwell) gave a short overview of the liaisons coming to SG 14 from SG 8. There was no significant discussion as this subject was more appropriate for discussion at the V.34 Rapporteurs meeting.

VOICE DATA MULTIPLEXING

Hayes requested the initiation of a new Project in TR-30.1 to pursue the development of a standard for voice compression. The group approved the initiation of a project request.

CONTRIBUTIONS

TR-30.1/93-12-070 (S. Olafsson, Rockwell) once again proposes the implementation of the soft encoder, now referred to as the Unified Trellis Encoder. It is now proposed as an optional facility with the ability to implement non-standard codes provided that at least one standard code is also implemented. There was some discussion indicating that this sort of proposal is too late for consideration for inclusion in V.34.

TR-30.1/93-12-071 (V. Eyuboglu, Motorola-Codex) provides replacement text for Section 9.7 on the Draft Rec. V.34. This new, clearer text is the result of off-line discussions between many of the TR-30 companies. The one major technical difference is that it now specifically calls out “rounding down” when there is a conflict in the coder; the methodology for resolving conflicts had not been specified before. (The occurrence of a conflict is extremely remote.)

OTHER PAPERS

Motorola-Codex indicated that they will be submitting an update to the half-duplex start-up.

GDC indicated that they will be submitting a joint paper with AT&T addressing additional data rates.

Dick Brandt, dB Consulting

TR-30.2, DATA TRANSMISSION

HIGH SPEED SERIAL INTERFACE (HSSI)

It was announced that TIA/EIA-613, “High Speed Serial Interface for Data Terminal Equipment and Data Circuit- Terminating Equipment”, has now been published. Chairman F. Lucas (GDC) indicated that publication of TIA/EIA-612, the electrical characteristics standard for use in TIA/EIA-612, is also imminent. REVISION OF EIA-422-A (SP-1849)

At the October meeting of TR-30.2, the results of the industry ballot on the revision of EIA-422-A showed acceptance of the standard. Small editorial changes were made to the document as a result of one comment received in the ballot process. This standard has now been forwarded to TIA for final approval and publication as TIA/EIA- 422-B, “Electrical Characteristics of Balanced Voltage Digital Interface Circuits”. This standard should be published in early 1994. REVISION OF EIA-423-A (SP-3058)

The revision of EIA-423-A, “Electrical Characteristics of Unbalanced Voltage Digital Interface Circuits” (SP-3058), was once again considered by TR-30.2. J. Goldie, editor (National Semiconductor), indicated that he had worked with a small editing group to revise the draft standard. TR-30.2/93-12-031 lists the changes made to the SP- 3058 draft, as a result of the comments received from the industry ballot which were considered at the October meeting. The primary area of revision was in ANNEX A, providing more meaningful information to the user. During editing, it was also found that a change to the Generator Output Impedance (section 4.1.1) was necessary. Formerly this was specified as less than 50 ohms. As a practical matter, this should be less that 100 ohms. This change was made in the draft. Additional changes were made to align SP-3058 with the recently approved TIA/EIA-423-B. More change came about as a result of recent discussions in ITU-T Study Group 14 concerning V.11. Operation of V.11 is defined up to a nominal rate of 100 kbit/s. This is somewhat vague and it was felt that better guidance could be provided in 422-B by changing the wording in Section 3 to indicate that rates above 100 kbit/s may be used but the user should consult Annex A for guidance. The 422 (V.11) electrical characteristic is being specified in the new V.34 (V.fast) recommendation for data rates up to 128 kbit/s. With these additional changes made to the draft standard (TR- 30.2/93-04-007R1), it was approved for default industry ballot.

CONTRIBUTIONS TO ITU-TSS SG 14 ON V.10 AND V.11

J. Moran (Motorola Codex) updated the committee on the work he has undertaken in testing the various grounding arrangements when TIA/EIA-422 and TIA/EIA-423 are used together. This ongoing work is a result of comments received from Germany in both ISO and ITU-T Study Group 14 work. J. Moran reported that he has received a “heavy duty” transformer which will permit simulation of ground noise conditions. He hopes to have test results for the February 1994 meeting so that a contribution to ITU-T Study Group 14 could be prepared. REVISION OF EIA-334-A (PN-2256)

Chairman Lucas announced that the industry ballot on the Revision of EIA-334-A, “Signal Quality at Interface Between Data Terminal Equipment and Synchronous Data Circuit-Terminating Equipment for Serial Data Transmission”, had closed on November 16, 1993. No negative ballots and no comments were received. Therefore, the revised standard will be forwarded to TIA for final approval and publication as TIA/EIA-334-B. As with TIA/EIA-423-B, users should expect to see the published edition of this standard available in early 1994. REVISION OF EIA-404-A (PN-2797)

Work on the revision of EIA-404-A, “Standard for Start-Stop Signal Quality for Non-Synchronous Data Terminal Equipment”, continues to progress very slowly. A new draft of the revision was available (TR-30.2/93-04- 011R1). This draft incorporates the new definitions which had been agreed to at the July meeting. The work continues to be difficult in that the present standard was written in consideration of teletype equipment. Today’s electronic terminals naturally exhibit far different characteristics than the old electromechanical terminals. The editor has agreed to take a look at simply eliminating the old teletype requirements and making the standard one for modern usage. It may be difficult to perform this task in that the document is very difficult to read in its present form. At this point, there is a 50/50 chance that this revision work may be abandoned and the standard just reaffirmed as is. DTE/DCE INTERFACE SELECTION GUIDE STANDARDS BULLETIN (PN-2415)

The chair announced that the standards bulletin TSB-54, “DTE/DCE Interface Selection Guide” had been sent to TIA for Publication. This bulletin provides guidance to users of interfaces between DTEs and DCEs in the selection of the correct interface and electrical characteristic to use. Committee members have indicated that they have had many inquiries as to when this bulletin would be available. It appears this is a document which is much needed in the industry. MINIATURE DTE/DCE INTERFACE FOR DIGITAL CELLULAR (PN-3138)

The committee received a copy of comments from TR-45.3.2.5 (TR-30.2/12-030, A. Angus, NovAtel) on the connector being considered for its work. G. Lawrence (AMP, Inc.) has agreed to act as a liaison to the TR-45.3.2.5 work and will be attending the January 1994 meeting to address the comments. The comments regard the mechanical aspects of the connector, some of which go beyond the inter-matability aspects for which TR-30.2 is responsible. The work has moved slower than had been anticipated. However, the editor for this new standard has promised a draft document for committee consideration at the February meeting of TR-30.2 . The workload of TR-30.2 has been very heavy; however, with the completion of many revisions to standards, more attention will be received by the newer projects. VERY HIGH SPEED INTERFACE

A discussion was undertaken to consider the possibility of developing new standards for very high speed interfaces in the 100 to 155 Mbit/s range. With ever increasing speeds being seen in networks, there appears to be an industry need for such standards. It was agreed to open an initial project to investigate an electrical characteristic standard for this range of rates. The primary contributors to this work are expected to be the semiconductor manufacturers. Fred Lucas

TR-30.3 DATA COMMUNICATIONS NETWORK INTERFACES

F. Lucas (GDC) review a letter from the Chair of TR-30 that discussed new procedures for Liaison Reports and Document reproduction at a meeting (TR-30.3/93-12-081). The letter states that liaison reports shall be brief and only be presented when a written report is available. It also states that contributors should bring an adequate number

of copies, the host will not provide additional copies at his/her expense, and that the reproduction of interim documents during the course of the meeting shall be the responsibility of the Chair.

LIAISON REPORTS

FCC Liaison TR-30.3/93-12-074, FCC BillBoard for November, was distributed for information. PN-2826 AND PN-3175, TEST PROCEDURES FOR EVALUATION OF 2 WIRE HIGH SPEED DUPLEX MODEMS

The chair thanked S. Satchell (Satchell Evaluations), and the PN-3175 ad hoc committee for their efforts in preparing the Test Procedures for Evaluation of 2 Wire Duplex Modems (TSB-38). TR-30.3/93-12-077 is Draft 10 of the Test Procedures for Evaluation of 2 Wire Duplex Modems (TSB-38), S. Satchell (Satchell Evaluations), editor. TR-30.3/93-12-073 (A. Clark, Hayes) is text for section 5.2. The committee reviewed Draft 10 section by section for technical changes. The results of this review process are reflected in TR-30.3/93-12-079, Draft 11 of the Test Procedures for Evaluation of 2 Wire Duplex Modems (TSB-38). TR-30.3/93-12-080 (J. Moran and L. Brown, Motorola Codex) is Revised Sections of PN-3175 and Annex F of PN- 2826, Results Presentation Format for Error Rate vs. Network Model Conditions. J. Moran and L. Brown also discussed the test procedures that should be used to run the Error Rate vs. Network Model Tests Section. The committee agreed with the concept of the testing procedures. J. Moran and L. Brown agreed to write these test procedures which will then be included in section 5.3 of PN-2826/PN-3175 and an Annex of PN-3064. The committee letter ballot will be posted on the BBS. The ballot comment period ends February 3, 1994. Comments to the letter ballot should be separated into technical issues and editorial comments. The comments should be supplied in a written form and on disk using Excel, with headings for Comments, Page, Line, Suggested Change. PN-3064, PSTN TRANSMISSION MODEL FOR EVALUATING MODEM PERFORMANCE

The chair thanked J. Moran and L. Brown (Motorola Codex), L. Smith (AT&T), and the PN-3064 ad hoc committee for their efforts in preparing PSTN Transmission Model for Evaluating Modem Performance (TSB 37A)/PN-3064 -- Draft 4. The following documents were distributed and reviewed by the committee: TR-30.3/93-12-076, Draft 5 of PSTN Transmission Model for Evaluating Modem Performance (TSB 37A)/PN- 3064. TR-30.3/93-12-078, Comparison of June, July, and October drafts of PN-3064 (J. Oswalt and M. Gauer, Rockwell). TR-30.3/93-12-080, Revised Sections of PN-3064 and Annex F of PN-2826, Results Presentation Format for Error Rate vs. Network Model Conditions (J. Moran and L. Brown, Motorola Codex). The committee reviewed Draft 5 section by section for technical changes. The results of this review process will be reflected in the committee letter ballot. The committee letter ballot will be posted on the BBS. The ballot comment period ends February 3, 1994. Comments to the letter ballot should be separated into technical issues and editorial comments. The comments should be supplied in a written form and on disk using Excel, with headings for Comments, Page, Line, Suggested Change. Jack Douglass

TR-30.4, DTE-DCE PROTOCOLS The chair distributed for information a letter to the chairman of the Portable Computer and Communications Association (PCCA), authorizing them to use the AT+W command extensions for their wireless applications (un- numbered document).

R. Brandt (Chair, TR-30) informed the group of some new rules/guidelines to follow at future meetings. • Since verbal liaison eats up too much time in meetings, all future liaison statements must be in the form of a written document. • Duplication of documents at meetings is not the responsibility of the host, except those documents that need to be reproduced for approval at that meeting. It is the responsibility of the contributors to supply enough copies for the group. It is the chairman's responsibility to pay for committee working documents that need to be reproduced during the meeting. • Future standards/bulletins are to be prepared in Word for Windows 2 and Excel 4, using Arial font. L. Brown (Motorola Codex) reported briefly on the status of the IETF work on an SNMP modem MIB. Their goal is to complete a stripped down version of the modem MIB by the end of January 1994. Object groupings and definitions are to be aligned with V.58 (previously V.im, Management Information Model for V-series DCEs) as much as possible. The question of the status of V.58 was also discussed. Since the Rapporteur/editor (D. O'Connor) resigned, and since at least one more Rapporteur meeting will be necessary to complete the work, it is no longer feasible to apply Resolution 1 treatment to V.58 at the June 1994 meeting of ITU-T SG 14. Approval will have to be delayed until the April 1995 meeting. PN-2812, I N-BAND DCE CONTROL FOR ASYNCHRONOUS DTE-DCE INTERFACES

Since the editor, J. Decuir (Microsoft), was not present at this meeting, his contributions were distributed at this meeting to be discussed at the next meeting. In the committee letter ballot, SP-2812 (In-Band DCE Control for Asynchronous DTE-DCE Interfaces) received 1 NO vote as well as several other technical comments. The committee agreed to make revisions to the draft before reballoting it. TR-30.4/92-01-003R7 contains a preliminary new draft. A more complete draft will be available at the next meeting. TR-30.4/93-12-047 contains a proposal from T. Nixon (Microsoft) on the semantics and syntax of a command to control the In-band reporting of Mark-idle. This will be discussed further at the next meeting. TR-30.4/93-12-043 (Qualcomm) proposes additions to SP-2812 for CDMA circuit mode data services. TR- 45.5.1.5's requirements were discussed, and TR-30.4 was unofficially requested to reserve a block of code space for their use. The group agreed that the editor would work changes into the next revision for our February meeting (reserving 1 or 2 codes in each direction). We should expect an official liaison from TR-45.5.1.5 at that meeting, requesting these changes . TR-45.1.5 plans to ballot PN-3140, Data Services Option Standard for Wideband Spread Spectrum Digital Cellular System, around that time. PN-2989, EXTENDED DCE FUNCTIONS

TR-30.4/93-04-007R1 from the editor, J. Bain, contains draft revision 2 of PN-2989, Extensions to Asynchronous Serial Automatic Dialing and Control. TR-30.4/93-12-044 (Hayes) proposes some specific commands to be included in PN-2989. These will be considered by the group. TR-30.4/93-12-045 (Hayes) proposes modifications to the AT+DDC (data compression) command to bring it into alignment with the way V.42bis functions. The group agreed to this; however, the “compression OFF” parameter value still needs clarification. TR-30.4/93-12-048 (Microsoft) points out that other standards groups have been waiting for more than a year for TR-30.4 to complete their work on PN-2989, and proposes a path to follow towards creating an Interim Standard to satisfy their immediate needs: 1) Choose functions from current drafts of PN-3123 (from TR-45.3.2) and PN-3140 (from TR-45.5.1.5). 2) Align the semantics with V.58 where there is overlap. 3) Choose the syntax based on TIA-615 and subsequent decisions. 4) Ballot this within TR-30.4. 5) Distribute this to TR-45.5.1.5 and TR-45.3.2 as soon as it has been approved. The group agreed to follow this path. The goal is to bring a draft Interim Standard to the February meeting, ballot it, and resolve ballot comments at the April meeting. The more complete standard can then be worked on, which

16 Vol. 5.1 Copyright © CSR 1994 January 1994 COMMUNICATIONS STANDARDS REVIEW should include all of the common modem functionality missing from TIA-602, which, to date, modem manufacturers have implemented using different AT commands. There was a brief discussion on simultaneous data and voice. There is a need for an ATH type command to terminate the data only portion of the call. There was also a discussion about including a Help command (AT+H?). There were no resolutions on either of these points. R. Brandt (dB Consulting) briefly discussed a required minor change to the operation of the AT+DV18:V18 command for DCEs supporting V.18. An un-numbered document outlining differences between how V.58, TIA-578 and IS-101 report manufacturer ID was discussed briefly. No resolution was reached on this. NEW PROJECTS

TR-30.4/93-12-046 (D. Rife, Hayes) proposes that a new TR-30.4 project be opened to develop AT commands, a means for multiplexing voice and data across the DTE interface, and other necessary DTE/DCE interface functions to support voice/data multiplexing algorithms. This would be in conjunction with a proposed new project in TR- 30.1 to identify the requirements and develop or select voice compression and voice/data multiplexing algorithms. The chair agreed to prepare a project proposal and submit it to TIA, provided that TR-30.1 does the same. (Editor’s note: TR-30.1 also prepared a project proposal.) Les Brown, Motorola Codex

TR-30 PARTIAL ROSTER, DECEMBER 6 - 10, 1993, ORLANDO, FL, Dick Brandt, dB Consulting Chair, TR-30 Don O'Connor, Racal Datacomm Chair, TR-30.1 Dick Stuart, Penril Datability Networks Acting Chair, TR-30.1 Ken Jones, Telebit Chair, TR-30.1 ad hoc Fred Lucas, General Datacomm Chair, TR-30.2 Jack Douglass, UDS-Motorola Chair, TR-30.3 Jay Bain, UDS-Motorola Chair, TR-30.4 Host: AT&T.

AMP George Lawrence Motorola - Codex Vedat Eyuboglu AT&T Bill Betts Motorola - Codex Dave Forney AT&T Dick Brandt (dB Consulting) Motorola - Codex Jack Moran AT&T George Chen Motorola - UDS Richard Goodson AT&T Rick Flanagan Motorola - UDS Mickey Rushing AT&T Paul Fletcher National Semiconductor Ron Cohen AT&T Krishna Murti National Semiconductor John Goldie AT&T Keith Nauman Penril Datability Zoran Mladenovic AT&T Micky Nipper Penril Datability Alexsander Purkovic AT&T Mohendra Patel Penril Datability Dick Stuart AT&T Larry Smith Primary Access Chris Heeguard AT&T Lou Smithwicke Primary Access John Rosenof AT&T Keith Sonders PTT John Graham AT&T Ed Zuranski Racal Datacom Vedavalli Krishnan British Telecom John Brownlie R. Scott Associates Karl Nordling British Telecom Richard Williams R. Scott Associates Paul Sawyer Comm Tec Assoc. Inc. Jim Jennings Rockwell International Michael Gauer Consultronics Louis Chenier Rockwell International Glenn Griffith Cornel Michael McLaughlin Rockwell International Don Harmer Digital Equipment Corp. Remi Lisee Rockwell International Joe Hoang GDC Dick Drake Rockwell International Sverrir Olafsson GDC Yuri Goldstein Rockwell International Jess Oswalt GDC Fred Lucas Satchell Evaluations Stephen Satchell Hayes Dave Rife TAS Jerrold Johnson Henderson Coms. Labs Warren Henderson TAS Kevin Langan IBM Ken Klinger TAS Dave Tarver Intel King Cheng Telebit Ken Jones Intel Weiqiang Ma Texas Instruments Kevin Gengerich Intel Berry O'Mahoney US Robotics Andy Norrell ITT-Florian Ping Dong --- Steve Sweitzer Motorola - Codex Les Brown

Project 743 Working Group, “Methods and Equipment for Measuring Analog Transmission Parameters for Telecommunications, is part of the IEEE Committee “Transmission Systems”, and the “Transmission Testing Methodologies and Equipment” Subcommittee. Their next meeting is February 7 – 9, 1994, at the IEEE Service Center in Piscataway, NJ.

The following are documents from the IEEE P743 Working Group that relate to the work going on in TR-30.3, Data Communications Network Interfaces.

P743/93-25 (J. Turner, Convex Corp.) provides design descriptions and tolerances for analog implementations of the following filters: • Hum Rejection Filter • 3.4 kHz Flat Filter • D Filter • E Filter • F Filter

P743/93-27 (J. Moran, Motorola Codex) offers a suggestion regarding the design requirements for a DC Holding Current for transmission Impairment Measurement Sets.

P743/93-28 (J. Moran, Motorola Codex) discusses terminating impedance requirements for a Transmission Impairment Measurement Set. The paper suggests that impedance requirements are dictated by bandwidth requirements. P743/93-29 (J. Moran, Motorola Codex) discusses digital implementation design considerations of the D-Filter design. It compares the analog D-Filter implementation to a standard Bilinear Transformation digital filter design and to a Motorola-Codex custom digital filter design. P743/93-30 (C. Adesanya, Bellcore) suggests active speech level requirements for P743. Active Speech Level is an objective measure of the average speech power (rms. level) of the active portion of speech. The active portion of speech includes those short periods of low energy that a listener perceives as a part of speech, but excludes pauses. An Active Speech Level meter is an instrument for measuring the level of a continuous or interrupted speech signal. It is capable of measuring analog and digital speech from 0 dBm to -35 dBm.

P743/93-31 (P. J. Dugal, Bellcore) presents some analog items from the ITU-T WP 2/4 meeting in October 1993. Some ITU-T Study Groups wish to introduce transmission measurements using complex impedances, and End-to- End Transmission Measurements. If so, there may be an impact on Standard 743 measurements, as some of the analog items indicate.

P743/93-32 (J. F. Ingle, Bellcore) extends the intermodulation distortion mathematics from a 3-tone signal to a 23-tone signal. The 23 tones have the frequencies (10n +3) 15.625 Hz, where n goes from 1 to 23. All second-order IMD products fall in bins which end in 0 or 6. All third-order products fall in bins which end in 3, 9, or -3(7). Only Gaussian noise and quantizing noise fall in the bins which end in 1, 2, 4, 5, and 8. This permits independent determination of signal-to-noise, signal-2nd-order IMD, signal-3rd-order IMD, and signal-total-distortion.

P743/93-34 (J. F. Ingle, Analog/Digital Testing) is a draft of IEEE Std 743-1993, Standard Methods and Equipment for Measuring Analog Transmission Parameters for Telecommunications, dated December 29, 1993. P743/93-35 is the table of contents for this draft.

P743/93-36 (J. F. Turner, Convex Corp.) provides specific recommendations for calibration standardization of equipment used to measure level at a T1/DSO appearance. The methodology is applied to the “Digital Reference Sequence,” a 1010 Hz “Holding Tone,” and Digital Milliwatt using µ255 encoding.

P743/93-37 (J. F. Turner, Convex Corp.) provides guidance regarding Level Measurement Averaging. It suggests a modification to §6.1.2.6 of the draft standard.

P743/93-38 (J. F. Turner, Convex Corp.) recommends increasing the upper limit of the Level Measurement Range to handle “2B1Q” waveforms associated with Digital Subscriber Loop (DSL) and HDSL Transmission.

P743/93-39 (J. F. Turner, Convex Corp.) updates Table 4, Noise Measurement Ranges, to accommodate new weighting filters and to include measurements made at a Digital Appearance. It also attempts to simplify measurement ranges and clarify associated reference impedances.

P743/93-40 (J. F. Turner, Convex Corp.) provides design descriptions, amplitude response graphs, and response tolerances for analog implementations of: • Hum Rejection Filter • 3.4 kHz Flat Filter • D Filter • E Filter • F Filter Pole / zero locations and flat gain factors given for each filter define nominal steady state and transient characteristics. Detailed amplitude response tables provide a practical means for evaluating compliance.

The next issue of Communications Standards Review (Vol. 5 #2) is scheduled for late February, 1994.

TR-46/93.12.10.03, a letter from K. H. Rosenbrock, Director of ETSI, confirms “a free and irrevocable license to the TIA to incorporate text into TIA documents, from documents with ETSI copyright...”

TR-46/93.12.10.04 is a letter from Siemens informing TR-46 that Siemens holds patent rights to certain items which are parts of the GSM standards.

TR-46/93.12.10.05 is the meeting report of the Privacy and Authentication Ad-Hoc committee for December 10, 1993. There is considerable interest in the use of Smart Cards in PCS. Northern recommended the use of the DCS 1800 card modified for the US. Siemens provided information about the Subscriber Identity Module used in GSM.

TR-46/93.12.10.06 is the TR-46.3 meeting summary for the December 8-10, 1993 meetings. The JTC is analyzing the 17 system proposals received by November 1, 1993. The systems proposals are organized in three categories, with an ad hoc committee for each: large cell CDMA, large cell TDMA and small cell TDMA. The plan is for the JTC to submit draft standards back to the parent organization May - September 1994 and for initial balloting in the parent organizations to be completed by the end of the year.

TR-46/93.12.10.07 is a proposed letter from the Chair to Mr. Robert Amy requesting T1S1 to consider the TR- 46.2 Network Interfaces subcommittee’s recommendations for network interfaces.

TR-46/93.12.10.08 is the report of the Joint Experts Meeting on Privacy and Authentication for PCS, November 8-12, 1993 in Phoenix, Arizona. The meeting was sponsored by Telocator, TR-46, and T1P1. A number of decisions were reached: 1. A secret key authentication and privacy mechanism is needed in the near term. 2. A public key authentication and privacy mechanism should be used later in the deployment cycle. 3. Key distribution with minimum level of staff training is needed 4. Bearer channel privacy mechanism should be sufficiently robust to resist intrusive loss of voice privacy for a minimum acceptable period. (GSM privacy method results in a significant change in the level of privacy for a single call lasting about 3 hours.) 5. Authentication mechanisms must be air interface independent. 6. Access to Emergency Provider notification systems must be suitably provided. 7. Handover from Public to Private PCS should be allowed. 8. Authentication of users should be by a User Identity Module (UIM) which is physically separate from the wireless terminal. The UIM should adopt an existing standard. Users are required to authenticate themselves to the UIM by a PIN or equivalent.

TR-46.1, SERVICES & NETWORK REFERENCE MODELS

TR-46.1/93.12.06.02, a letter to E. Schimmel, TIA, recommends PN-3168, Personal Communications Service Descriptions for 1800 MHz, for letter ballot.

TR-46.1/93.12.06.05 (A. Kwok & D. Rollender, AT&T) provides an initial basic set of requirements for the A- Interface between the PCSC and the BS.

TR-46.1/93.12.06.06 is a letter to the committee officers from A. Kripalani, TR-46 Chair, reminding members of the TIA copyright and patent policies.

TR-46.1/93.12.10.01 is a summary of TR-46.1.1, Service Requirements & Descriptions meeting, December 6 - 10, 1993.

TR-46.1/93.12.10.02 is baseline text for PN-3167, Personal Communications System Requirements for 1800 MHz, dated December 10, 1993.

PN-3169, PCS NETWORK REFERENCE MODELS FOR 1800 MHZ

TR-46.1/93.12.06.03 (A. Kwok, AT&T) proposes a definition for Base Transceiver System (BTS) and a single definition for Visitor Location Register (VLR) for PN-3169.

TR-46.1/93.12.06.04 (E. Ehrlich & D. Salerno, Telocator) resubmits proposed changes to PN-3169.

TR-46.1/93.12.06.07 is Draft PN-3169, dated December 12, 1993.

TR-46.1.1, SERVICE REQUIREMENTS & DESCRIPTIONS

TR-46.1.1/93.12.09.01 (M. Hosford, AT&T) suggests that the reference model in TR-46.1.2 should reflect a network element status for the PCS Mobile Terminal and not reference it as an independent user device.

TR-46.1.1/93.12.09.02 (M. Hosford, AT&T) proposes that Air Interface Privacy mechanisms should be centrally located within the Personal Communications Switching Center (PCSC).

TR-46.1.2, NETWORK REFERENCE MODELS

TR-46.1.2/93.12.06.02 (Motorola) is a set of overheads showing the T1P1/TR-46 reference architecture development process.

TR-46.1.2/93.12.06.03 (Committee T1P1) is a technical report (November 1993) (T1P1/93-062R3) on network capabilities, architectures and interfaces for personal communications. It is a good overview of the issues from the network perspective (164 pages).

TR-46.2 NETWORK INTERFACES

TR-46.2/93.12.06.02 (K. Lewis & E. Grasser, Siemens), Dialog establishment between the Initial Set of MAP Signaling Functions and a subset of MAP Signaling Functions, contains information which will allow the phasing in of the MAP Signaling Functions and also provide a mechanism for later versions to communicate with earlier versions. TR-46.2/93.12.06.04 (K. Lewis, Siemens) summarizes telephone meetings of TR-46.2.2.4 regarding the identification and assignment of tasks for the conversion of the GSM MAP to PCS Mobility Management protocol signaling.

TR-46.2.1, PCN SIGNALING

TR-46.2.1/93.12.07.03 presents the scope and charter of Working Group I, a proposed table of contents and a proposed workplan for TR-46.2. The scope of the group is to develop and maintain performance, compatibility and inter-operability standards for systems supporting PCS in the 1800 MHz band.

TR-46.2.1/93.12.07.04 (M. Burke, D. Wood, C. Schmidt, Motorola) provides requirements for the MSC - BS (A- Interface of the TR-45 reference model).

TR-46.2.2, PCN TO PCN INTERSYSTEM OPERATIONS

TR-46.2.2/93.12.06.03 is a liaison from TR-46.3 to TR-46.1, TR-46.2 and TR-46.3.1 regarding PCS system identification. It asks what System Identification (SID) Code/Network Identification (NID) Code the working parties plan to support.

TR-46.2.2/93.12.06.04 is a letter to the committee officers from A. Kripalani, TR-46 Chair, reminding members of the TIA copyright and patent policies.

TR-46.2.2/93.12.06.05 (M. Dolly, AT&T) recommends that the IS-41 and GSM MAP Task Groups include the protocol capabilities listed in this document, in the first version of the PCS MAP Standard.

TR-46.2.2/93.12.06.06 (M. Cobo, Ericsson) proposes needed modifications for sections 1, 2 and 3 of TR- 46.2.2.4/93.10.20.03 (GSM MAP Specification).

TR-46.2.2/93.12.06.07 (Section 2 Sub-Task Group) proposes intersystem handoff procedures for supporting the terminal-determined handoff type.

TR-46.2.2/93.12.06.08 (Section 3 Sub-Task Group) describes the proposed modifications to IS-41.3 (B), Automatic Roaming, to support intersystem operations for the PCS 1800 network.

TR-46.2.2/93.12.06.09 (M. Zhang, McCaw Cellular) defines the requirements for PCS Intersystem Trunk Maintenance and analyzes the IS-41(B) Cellular Intersystem Trunk Maintenance as the basis for the PCS 1800 Network Standard.

TR-46.2.2/93.12.09.02 recommends modification of the table of contents of PN-3212 (PCN Intersystem Operations) to reflect relevant topics in PN-3167 (PCS System Requirements).

TR-46.2.2/93.12.09.03 lists PCS System Requirements and System Aspects to be considered by the PCS MAP in the definition of the PCN to PCN Intersystem Operations.

TR-46.2.3, INTERSYSTEM OPERATIONS BETWEEN PCN AND NON-PCN

TR-46.2.3/93.12.08.02 is the proposed baseline text for PN-3211, Intersystem Operations for PCN to Other Network Entities, dated December 8, 1993.

TR-46.2.3/93.12.09.03 is the proposed Interim Standard IS-93 for Cellular Radio Telecommunications Ai - Di Interface Standard, which has been approved for publication.

TR-46.2.3/93.12.09.04 (M. Dolly, AT&T) states that PCS systems that hand off a call to an intermediate network should supply supplementary information to assist in network fraud control.

AD HOC ON PCS AT 2100 MHZ

On September 23, 1993 the FCC allocated four, 10 MHz blocks of spectrum in the 2100 MHz band for PCS. This spectrum will be auctioned on a BTA (Basic Trading Area) basis with some restrictions upon who may use the spectrum. One 10 MHz block is reserved for small business and "protected" groups; current players may only acquire one 10 MHz block; no more than 40 MHz (one 30 MHz MTA [Major Trading Area] and one BTA, or one 20 MHz BTA and 2 10 MHz BTAs, or 4 10 MHz BTAs) may be aggregated in any market area by one company.

TR-46.AHOC2100/93.12.07.02 is a call for contributions to the Ad Hoc Committee on PCS at 2100 MHz.

TR-46.AHOC2100/93.12.07.03 (M. Emery, APC) suggests uses for the 2100 MHz band allocated by the FCC for the PCS industry: Small business supplier: Local area services (pedestrian and in-building) Data only service Niche service LEC supplier Wireless local loop Wireless pay phones Wireless Centrex Cellular supplier Expand existing services Data services

TR-46.AHOC2100/93.12.07.04 (M. Emery, APC) proposes a framework for collecting and analyzing issues for PCS at 2100 MHz.

TR-46 ROSTER, DECEMBER 6 - 10, 1993, ORLANDO, FL

Anil Kripalani, AT&T Chair TR-46 Stephen Jones, NEC Vice Chair TR-46

AT&T Helen Chu AT&T Kimberly Harris AT&T Mark Hosford AT&T Anil Kripalani AT&T Alicia Kwok AT&T Douglas Rollendar Bell Atlantic Ed Moore Bellcore Cliff Halevi BellSouth Don Zelmer Defense Info. Sys. Ag. Sam George McCaw Ming Zhang Motorola Tony Akers Motorola Dan Brown NEC Stephen Jones Nokia Research Center Ari Ahtiainen Northern Telecom Patrick Johnson Northern Telecom Tony Saboorian NovAtel Allan Angus NYNEX Erkin Cubukcu PacTel Dennis Peck Qualcomm Mark Epstein Qualcomm Tom Inklebarger Sarnoff Newman Wilson Sharp Rock Shih Siemens Dick Blake Siemens Eric Figueras Southwestern Bell Rolyn Callahan Synacom Technology Randy Snyder U. S. Intelco Networks Kenn Moisey U. S. West Jim Dahl

THE CSR LIBRARY Copies of documents listed in boldface type can be ordered from Communications Standards Review, where not prohibited by copyright. We have a large library of standards work in process and can help you locate other information you may need.

The ITU-T SG 15 Experts Group on Very Low Bit Rate Visual Telephony met to develop Recommendations for a Low Bit Rate Videophone. The objective of this work is to develop two sets of Recommendations. The first, H.VLC/N, employing near term technology, would be finalized in 1995. The second, H.VLC/L, employing more advanced technology, would be finalized in approximately 1998.

VIDEO GROUP

K. Rijkse (PTT, Netherlands) is the coordinator.

VIDEO FORMAT

The following potential solutions for the video format were identified:

1. QCIF as the only picture format for H.26P (Video Coder for The Very Low Bit Rate Videophone - near term) 2. QCIF as an optional format, with two smaller transmitted formats in addition, one for the 525 and one for the 625 line regions: a. 128 x 112 (525) b. 128 x 96 or 128 x 144 (625)

The coded pel area for the 128 x 144 format is for further study. It was decided that interoperability between a. and b. (above) should be achieved by only adapting the way the decoded pictures are displayed. How to do this is for further study). This kind of interoperability will not affect the encoding or decoding process.

A third option, QCIF and one smaller format, would be preferable over Option 2 from a technical point of view. However, it is very difficult to decide which smaller format should be taken in this case.

CODING ALGORITHM

It was decided to adopt an updated description of SIM3 (LBC-93-137, Simulation model for very low bitrate image coding) as an ITU Test Model for the near term (name: TMN1). It was agreed that experiments are required for at least the following items:

• Motion Estimation (only 16x16 or also 8x8 or 16x8/8x16) • Chrominance Motion Compensation (quarter or half pel?) • Optimization of VLC-codes (especially for CBPCM)

OTHER ITEMS

The meeting also addressed a test plan, and Draft Recommendations H.26P and H.26P/L (Video Coder for The Very Low Bit Rate Videophone - long term) .

SPEECH GROUP

R. Cox (AT&T) is the coordinator. LBC-93-089 is a liaison from TG-8, June 1993, stating the draft objectives for speech coders for FPLMTS.

SUBJECTIVE TEST PLAN

A subjective test plan was agreed to by all members of the group (based on LBC-93-111 from AT&T). The schedule calls for two rounds of testing. The first phase (Selection Phase) will be carried out by AT&T between now and the next LBC meeting in Paris, France. The results from that test will be discussed at the next LBC meeting. The speech coding experts group will make a recommendation at that time as to which coders should be considered for inclusion in the second pahse (Characterization Phase) test.

Other topics discussed included Draft Recommendations, AV.25Y (Speech Coder for the Very Low Bit Rate Videophone), intellectual property, and audio visual testing.

SYSTEM GROUP

D. Morley (Signals & Software, UK) is the coordinator. LBC-93-112 from the coordinator is a first draft of Recommendation H.32P. The committee made considerable comment about areas that need changes. LBC-93- 082 (AT&T) provides a good overview of the performance of high data rate modems over DCME. LBC-93- 083R1 is the November 25, 1993 draft of V.8 (V.34 start up procedures). Considerable discussions on the default/mandatory modem (V.34 or V.32bis) occurred without resolution.

The following agreements were developed:

• V.34 will be employed. It was not decided whether it will be mandatory or optional. • As a baseline for planning purposes, transmission bit rates from 9.6 kbit/s to 28.8 kbit/s in 2.4 kbit/s increments will be considered.

LBC-93-144 is a liaison to SG 14 requesting a code point in V.8 for video telephony, modem type negotiation separate from video telephony negotiation, and a request for comment on means to utilize DCE with V.42 as independent DCE for video telephony.

Also discussed:

• Video quality at low bit rates. • Estimation of most likely transmission bit rates to determine points for design optimization.

MULTIPLEX, DATA AND CONTROL R. Brainard (AT&T) is the coordinator. Draft Recommendations H.22P (LBC-93-130, Multiplex/Error Control, AT&T), H.24P (LBC-93-131, Supervisory Control, AT&T) and H.DLP (LBC-93-132, Data Interface, AT&T) were considered, and it was agreed that editing is necessary. H.22P was discussed as follows:

• There was a tutorial discussion of asynchronous packet transmission such as LAPB, LAPD, LAPF as well as non-HDLC (bit multiplexing) protocols for H.22P (LBC-93-123, KNEX). LBC-93-133 (AT&T) introduces LAPV as a proposed protocol for video telephony. • There is a need to clearly quantify and communicate the percentage overhead of the proposed control system at all bit rates.

AD HOC COMMITTEES

Eight Ad Hoc Committees were established to continue the work between the Middletown and Paris meetings:

• Audiovisual Testing • MPEG4 Requirements • Modem • Picture Format(s) • H.320 Interoperability • LBC/SG1 Requirements • Multiplex • Speech

Richard Schaphorst, Delta Information Systems

SG 15 EXPERTS GROUP MEETING ROSTER, DECEMBER 7 – 9, 1993, MIDDLETOWN, NJ

Dick Schaphorst, Delta Information Systems Rapporteur

ACTION Consult’g, USA Ken Krechmer ASPI, USA Russ Mersereau ASPI, USA Craig Richardson AT&T, USA Ralph Brainard AT&T, USA Richard Cox AT&T, USA Chuck Dvorak AT&T, USA Barry Haskell AT&T, USA Ilene Heyward AT&T, USA Al Morton AT&T, USA Anthony Schiano AT&T, USA Dale L. Skran Aware, Inc., USA Halil Padir Bellcore, USA C.T. Chen Bellcore, USA Ting Chung Chen Bellcore, USA Shaw-Min Lei Bellcore, USA Andria Wong BT, UK Bill Welsh CLI, USA Dan Klenke CNET, France Gerard Eude CNET, France J. Guichard Comtech, USA Sinan Othman CSR, USA Elaine Baskin DBP Telekom, Germany Peter List Delta Information, USA Richard Schaphorst DSP Group, Israel Yair Be’ery France Telecom Claude Lamblin France Telecom Stéphane Proust GTE Labs, USA Pat Tweedy Hughes Aircraft, USA Ron Burns Intel, USA Brian Astle KNK Consulting, USA Kristine Kneib Marconi, UK Charles Cox Marconi, UK David Morley Marconi, UK Andrew Moyler MCI, USA Fred Huffman Motorola, USA Cheung Auyeung Motorola, USA Ira Gerson Nokia, Finland Petri Latva-Rasku Norwegian Telecom Gisle Bjontegaard PCSI, UK Andy Lincoln PictureTel, USA Xiancheng Yuan PTT, Netherlands Karel Rijkse Rockwell, USA Tom Geary Sharevision, USA Lung Yeh Siemens, Germany István Sebestyén Sun Microsystems, USA John Liu US Robotics, USA George Landsburg VTEL, USA David Hein

K. Murti (AT&T, USA) reviewed Draft recommendation V.34 (Orlando-TD-03), highlighting the additions and changes to the document.

LIAISONS

G. Griffith (Rockwell, USA) reviewed Orlando-TD-05, Orlando-TD-06, and Orlando-TD-07, liaisons from SG 8.

Orlando-TD-05 expresses concern about the lack of formal liaisons to SG 8 on V.34. It requests specific patent information. As a result, formal liaisons will be made following this meeting. On the IPR issue specifically, Mr. Senuma will be requested to forward copies to SG 8 of the V.34 IPR statements to date.

Orlando-TD-06 asks for information on the robustness of the 1200 bit/s modulation scheme versus 300 bit/s, and information on the facility for reporting of data rates.

On reporting of data rates to the DTE, it was decided to state that the notification of the connect rate would be known by the modem but the means of conveying this information would not be specified in V.34. On the robustness issue, it was stated that with proper coding, 1200 bit/s could be more robust than 300 bit/s although the throughput might not be any faster.

Orlando-TD-07 asks SG 14 to provide non-interruptive rate changing mechanisms. TD-22 (see below) supports such a capability but the meeting could not reach agreement. A liaison (TD-32) to SG 8 was generated after the meeting, noting that it is too late to consider non-interruptive data-rate change and that a provision of this type of facility will likely be revisited when work on V.34 bis is initiated.

DATA MODE

Orlando-TD-08 (TR-30.1/93-12071, V. Eyuboglu, Motorola, USA) is revised text for Sections 9.7 and 9.8 of the V.34 draft. It highlighted the rounding down approach to resolve conflicts. Orlando-TD-21 (TR-30.1/93-12070, S. Olafsson, Rockwell, Iceland) presents an optional unified trellis encoder for V.34.

Orlando-TD-23 (G. Ungerboeck, IBM, Europe) offers an alternative way of describing the precoding function. It resolves the ambiguities through the use of truncation.

STARTUP

Orlando-TD-13 (TR-30.1/93-12078, R. Goodson, Motorola, USA) proposes five amendments to the startup procedure.

Orlando-TD-14 (TR-30.1/93-12079, L. Brown, Motorola, USA) presents various mechanisms for recovery of an error in INFO0. L. Brown’s presentation highlighted Option 4 (out of five options).

Orlando-TD-15 contains the agreements reached the previous week in TR-30 on startup. The agreements were: • The end-to-end information will be removed from the INFO0 sequences. An extension octet will be defined for JM/CM to convey some indication of the volume of data to be transmitted in each direction. A bit masked word will be exchanged during Phase 4 to indicate data signaling rates that are enabled in each modem. Asymmetric data rate capabilities will also be exchanged at that time. • Option 4 of Orlando-TD-14 should be used for the INFO0 error recovery mechanism provided INFO0 sequences are transmitted full duplex. • The INFO0 should begin with a Barker sequence and end with a CRC, as described in Orlando-TD-13 • The INFOa bits should be arranged as per Orlando-TD-13 • The J3 marker in Phase 3 should contain 1 bit of information and be encoded as described in Orlando-TD-13

Orlando-TD-16 (TR-30.1/93-12080, J. Brownlie, BT plc, UK) is an overview of a proposed duplex V.34 start-up and subsequent rate negotiation, with demod/remod.

Orlando-TD-9 (TR-30.1/93-12073, K. Jones, Telebit, USA) highlights the new RATERQ exchange.

Orlando-TD-12 (TR-30.1/93-12077, R. Goodson, Motorola, USA) is an enhanced version of the current phase 4 proposal.

Orlando-TD-17 (TR-30.1/93-12081, J. Brownlie, BT plc, UK) is a proposal for V.34-specific end-to-end parameters in CM/JM.

Orlando-TD-10 (TR-30.1/93-12074), Proposal for Rapid Rate Renegotiation and Resychronization in V.34, and Orlando-TD-11 (TR-30.1/93-12075), Proposal for a V.34 Retrain Procedure, were introduced briefly by K. Jones (Telebit, USA).

Orlando-TD-18 (TR-30.1/93-12082) and Orlando-TD-19 (TR-30.1/93-12083) are both from J. Brownlie, BT plc, UK). Orlando-TD-18 proposes an optional call-function extension in V.8; Orlando-TD-19 proposes an extension to draft V.8 to assist fax/tel switching. This option was presented in some detail in order to provide as much justification as possible. There was considerable discussion about the appropriateness of including this additional feature in V.8 at this time

Orlando-TD-20 (TR-30.1/93-12076, S. Olafsson, Rockwell, Iceland) presents a method for fast startup of the 600 baud control channel for V.34 half-duplex.

Orlando-TD-22, which was supported by UDS, Racal Datacomm, Rockwell, Cornel and BT plc, was introduced by R. Goodson (Motorola-UDS, USA). It proposes text that would allow the use of the 200 bit/s secondary channel for network management and modem control. Two different types of superframes are specified to differentiate between these two uses. Discussion following this presentation indicated that support for this proposal was not universal (even within Motorola).

WORKING GROUP REPORTS

Before breaking into working groups, R. Stuart (Penril Datability Networks, USA, Rapporteur) cautioned that the work on completing the Recommendation must be done before the discussion of any new ideas.

DATA MODE

D. Forney (Motorola-Codex, USA) reported that the decision made by straw vote in his group confirmed staying with the existing decisions on the precoder and the coding. This amounted to adopting the proposal in Orlando- TD-08 (TR-30.1/93-12-071) over Orlando-TD-23 for the precoder description and rejecting the Orlando- TD-21 (TR-30.1/93-12-070)proposal for an optional universal (soft) encoder.

STARTUP

K. Jones gave an overview of the Proposed Startup Text which is Section 10 of the Draft Recommendation. This document is quite large, presently requiring 28 pages of text. The need for this large amount of information is driven by a desire to eliminate any ambiguities for this Section, which is critical to interworking. He stressed that although all of the necessary text was present in the document, some restructuring and clean-up were necessary.

LIAISONS

The group approved a liaison back to SG 8 which addressed the IP, data rate notification, 1200 bit/s reliability, and V.34 status issues. G. Griffith (the Q19/8 Rapporteur) agreed to distribute the latest version of Draft V.34 to his Rapporteurs group outside of, and in addition to, the formal ITU channel.

Prior to the presentation of the final papers, R. Stuart distributed a copy of a fax that he had received from T. Irmer ( the Director of the ITU-TSB) announcing that he would contact companies which had submitted IPR statements, and act as a mediator in resolving any IPR issues raised in connection with V.34.

Orlando-TD-26 proposes definitions for the primary, auxiliary and secondary channels. An auxiliary channel was defined as a modem to modem channel. The definitions were accepted with minor modifications.

Orlando-TD-27 proposes editorial changes to the draft recommendation to more clearly define the implementation of the optional secondary channel. Although a separate interface connector was specified for the access to the secondary channel, provision was also made to allow the use of the backward channel poles in the main connector. In discussion, questions were raised regarding the provision of flow control on the secondary channel. It was finally decided to modify the tables to make Circuit 121 mandatory when the secondary channel is provided on the same connector as the main channel, and Circuit 106 mandatory in the separate connector issue.

Orlando-TD-28 summarizes the points in Orlando-TD-22 on the use of the auxiliary channel for affecting a seamless rate change. The Rapporteur unsuccessfully attempted to get the meeting to address one-by-one the five points raised in Orlando-TD-28. In the end, he terminated the discussion in an effort to complete the work which was necessary to the provision of the basic modem.

Orlando-TD-29 contains a list of the agreements reached in the startup working group.

The Rapporteur asked for and obtained the group’s acceptance of the text contained in Orlando-TD-25 rev (duplex and half-duplex operating procedures), Orlando-TD-30 (definitions) and Orlando-TD-31 (half-duplex operating procedures) to provide the basis for testing. Orlando-TD-30 contains the definitions which would replace pages 12 and 13 of Orlando-TD-25 rev. It was pointed out that the drawing in Orlando-TD-31 was “out of date” and that the drawings in Orlando-TD-25 rev should be used. Section 11 of Orlando-TD-25 rev is to be replaced by Orlando-TD-31 - Half Duplex Operating Procedures.

Some discussion relating to how to get the draft V.34 document into a final state followed. It was decided that the “cleanup” work would be done by correspondence (electronically) with the goal of having a final document available by the first week of January.

The maximum data rate of V.34 was reviewed. It was agreed that appropriate bits should be provided to extend the data rates above 28.8 Kbit/s. However, no agreement was reached on what the actual data rates would be.

“COMPLETION” OF V.34

At the end of the meeting it was clear that V.34 had been “completed.” There will be some editing going on through January, but everything is now in place for implementations and testing. The rapporteurs group will meet again February 14-15 (Plantation, FL), but the only items to be considered will be editorial changes and changes due to interworking problems.

Dick Brandt, dB Consulting

Editor’s Note: A new draft of V.34 dated January 17, 1994 (V.34 1-17-94) is now available.

V.34 RAPPORTEURS MEETING ROSTER, DECEMBER 13 – 14, 1993, ORLANDO, FL

Dick Stuart, Penril Datability Rapporteur

AT&T Bill Betts AT&T Dick Brandt AT&T George Chen AT&T Rick Flanagan AT&T Richard Folk AT&T Krishna Murti AT&T Mahendra Patel AT&T Larry Smith AT&T Keith Souders AT&T Jim Tomcik AT&T Edward Zaranski British Telecom (UK) John Brownlie British Telecom (UK) Richard Williams Cornel Elec. (Ireland) Michael Mc Laughlin Cornel Elec. (Ireland) Brian O’Sullivan Cornell University Chris Heegard Cray Comm.Ltd. (UK) John Magill Department of Defense Jeff Fritz Deutsche BT (Germany) Ralf-Rainer Damm Deutsche BT (Germany) Klaus Kern Digitel Marcos Tschoepke GDC Dick Drake GDC Yuri Goldstein GDC Fred Lucas Hayes Matt Easley Hayes Dave Rife IBM Ramin Nobakht IBM Gottfried Ungerboeck IIT Ping Dong Intel King Cheng Intel Weiqiang Ma Motorola Codex Les Brown Motorola Codex Vedat Eyuboglu Motorola Codex Dave Forney National Semiconductor Ron Cohen Nokia Lippo Rantanen Penril Datability Zoran Mladenovic Primary Access John Rosenlof R. Scott Raymond Chen Racal Datacom Chris Firth (UK) Racal Datacom Vedavalli Krishnan Rockwell Glen Griffith Rockwell Don Harmer Rockwell Sverrir Olafsson (Iceland) Sierra Semiconductor Earl Gibson Telebit Ken Jones TRT-Phillips Jean-Luc Botto UDS Richard Goodson UDS Mickey Rushing US Robotics Andy Norrell US Robotics Dale Walsh

TR-45.3 develops the following TDMA standards, including IS-54, IS-55, IS-56, IS-7X, and IS-85.

Due to a lack of contributions, TR-45.3 suspended TR-45.3.4. The group will be reactivated when TR-45.3 receives contributions dealing with capacity enhancements. Please see the TR-45.3.4 report below.

TR-45.2 has formed a task group to fold TSB-51, Cellular Radio Telecommunications Intersystem Operation: Authentication, Signaling Message Encryption, and Voice Privacy, into IS-41-C. TR-45.3/93.11.01.03 is the letter to P. Nurse (Chair, TR-45.3) from J. Marinho (Chair, TR-45.2). TR-45.3 appointed T. Watts (SW Bell) as its official representative to the task group.

IS-54-C

TR-45.3 set up a new working group, TR-45.3.6, to consider a proposal for IS-54-C. The proposed standard will comprise two parts: IS-54.1 will specify the digital control channels; IS-54.2 will specify the traffic channels and FSK control channels. Please see the TR-45.3.6 report below.

TSB-47, IS-54 I MPLEMENTATION ISSUES (PN-3160)

This Technical Services Bulletin identifies problems discovered in IS-54-B. Many of the problems result from supporting IS-54-B mobile stations on other base stations. Ballot replies to TSB-47, IS-54 Implementation Issues (TR-45.3/93.12.13.06), are as follows: 13 approve, 8 approve with comment, 1 does not approve, and 2 no comment. As a result of ballot comments, TR-45.3 adopted amendments, below. At its next meeting, TR-45.3 will decide if the amendments warrant a reballot.

• References to IS-55 will be changed to IS-55-A.

• § 2.4 Registration after Initialization

Replace TSB-47, p. 7, lines 27 to 29 with the following: If a success indication was supplied to this task and CPAs = 1, the mobile station shall set LRCCs equal to the control channel.”

• § 2.20 Privacy and Call Mode Management

Privacy mode and call mode can no longer be changed in the analog and digital Waiting for Order tasks. Also, to be consistent with the mobile station, the base station should respond to a call change in the Waiting for Answer tasks. Add the following to TSB-47, p. 17, l. 39: “and on page 125, delete lines 34–37. After line 26 on page 212, copy lines 10–13 from page 214.” It is not clear why IS-54-B, p. 206, lines 36 to 41 were left unchanged. These lines allow the base station to respond to a call-mode change or privacy-mode change in analog Waiting for Order task.

The section does not clearly specify how the mobile station should process an unexpected Status Request message. Add the following to TSB-47, p. 18, l. 48: “i.e., the mobile station does not respond to the incoming status request,”.

• § 2.21 Calling Number Identification

This section was not meant to add support for multiple instances of the SIGNAL information element. Remove the word “SIGNAL” from the following locations in TSB-47: p. 21, l. 44; p. 22, l. 1; p. 22, l. 17. Add the following to TSB-47, p. 22, l. 19: “SIGNAL information shall be the same for both instances of CNI.” Add the following after TSB-47, p. 22, l. 23: “Change the reference in IS-54-B, p. 245, l. 15 to be § 2.7.3.1.3.3.1 instead of § 2.7.3.1.3.3.”

• § 2.23 SDCC Compatibility

This new section describes how to maintain SDCC (Supplementary Digital Color Code) compatibility across all standards that use the FSK control channels. Basically, base stations should not transmit an SDCC of 0. This allows base stations to determine whether a mobile station supports, or does not support, SDCCs.

• § 2.24 Physical Layer Control Timer This new section describes how to avoid a deadlock condition. A mobile station may hang if it does not receive a Physical Layer Control message after handoff to a digital traffic channel. Add the following sentence to IS-54-B: “If no Physical Layer Control message is received within 5 seconds, the mobile station must turn off its transmitter and then enter the Serving System Determination task (see 2.6.3.12).” The sentence shall be added to the following locations: p. 126, l. 25; p. 128, l. 21; p. 130, l. 50; p. 135, l. 40; p. 138, l. 26; p. 141, l. 42.

• § 2.25 Termination of DTMF Disabled State This new section describes how to handle an abnormal termination of the mobile station’s DTMF-disabled condition. Add the following to IS-54-B, p. 132, l. 10: “If the 10-second timer that was set from the last valid flash expires, or if the mobile station is handed off to a DTC, or if the conversation is terminated, the mobile station shall re-enable the DTMF generator.”

CORRESPONDENCE

TR-45.3/93.12.13.04 includes the following correspondence from P. Nurse (Chair):

• A letter to L. Owens (Chair, TR-45.0.A) forwarding information on Short Message Service (SMS). The letter requests that TR-45.0.A report any issues associated with providing SMS data privacy. • A letter to J. Marinho (Chair, TR-45.2) responding to a letter that evaluates the impact of the DCC (Digital Control Channel) on intersystem operations. TR-45.3 agrees with TR-45.2’s assumptions with one exception: the use of SMEKEY (Short Message Encryption Key) to provide privacy for short messages. On this topic, TR- 45.3 has requested guidance from TR-45.0.A (see letter to L. Owens, above). • A letter to T. Akers (Chair, TR-45.1) responding to TR-45.1’s recommendations for the FSK control channels. First, TR-45.3 agrees that base stations should not transmit an SDCC (Supplementary Digital Color Code) of 0. This allows base stations to determine if a mobile station does not support SDCCs. Second, TR-45.3 disagrees that new order codes, not just different order qualifiers and message types, should be assigned to IS-54 messages. EIA-553 base stations should ignore messages they do not understand, and the existing approach conserves order codes. For the same reason, TR-45.3 believes that new order codes should not be assigned for fax and data services.

CHANNEL MODEL

Motorola presented the results of field tests performed in Chicago and the San Fernando Valley (Southern California). The tests show that the existing 40 µs 2-ray channel model is unrealistic. Motorola proposes a new channel model that represents actual field conditions.

TR-45.3 referred the following contributions to TR-45.3.3.5 and TR-45.3.6:

• TR-45.3/93.12.13.10 (Motorola) presents the results of field tests performed in the San Fernando Valley near the Santa Monica Mountains. The tests show that severe delay spreads exist only in a small percentage of the coverage area, and that the existing 40 µs 2-ray channel model is unrealistic. • TR-45.3/93.12.13.11 (Motorola) presents the results of field tests performed in the Chicago area. For a mobile station not equipped with an equalizer, delay spread only begins to affect speech quality in areas outside the cell boundary. Therefore, the existing 40 µs 2-ray channel model is unrealistic. • TR-45.3/93.12.13.12 (Motorola) proposes a channel model that represents actual field conditions. The contribution proposes that the following two-ray model be used to represent a typical urban environment: second

ray delayed by 10.3 µs relative to the first ray, second ray attenuated by 15 dB relative to the first ray, both rays independently Rayleigh faded to simulate 8, 50, and 100 km/h.

OTHER HIGHLIGHTS

TR-45.3/93.12.13.16 (Chair, TR-45.2) provides baseline text and a work plan for IS-53-A, Cellular Features Descriptions. The cover letter makes two requests of TR-45.3. First, review the document and provide comments by March14, 1994. Second, review the work plan to make sure TR-45.3’s timing supports the scheduled release of IS-53-A. July 94 is the target publish date. TR-45.3 deferred the contribution to allow time for review.

TR-45.3/93.12.13.18 (Chair, TR-45.3.5) is a draft letter responding to T1P1.6’s request for assistance concerning echo cancellation in hands-free telephony. The letter states that TR-45.3 recognizes that low-bit-rate codecs introduce significant delays, and that such delays increase the importance of echo cancellation. TR-45.3.5 is not presently discussing or specifying echo-cancellation requirements, but it will keep T1P1.6 informed of the delay introduced by TR-45.3’s half-rate voice codec. TR-45.3 adopted the contribution and forwarded it to TR-45. TR-45 will coordinate responses from its subcommittees.

TR-45.3.2, DATA SERVICES TR-45.3 WG 2 develops recommendations for circuit-switched data services, with a focus on Async Data Service and Group-3 Fax Service.

IS-XX, U M INTERFACE — RLP1 (PN-XXXX)

This standard specifies Radio Link Protocol 1 (RLP1), the air-interface link protocol that supports async-data and fax services. The following contributions were adopted as amended: TR-45.3.2/93.12.13.04, RLP1 SDL Diagrams (Chair), comprises 4 D-size sheets of SDL (Specification and Description Language) diagrams: 3 sheets for the ARQ process and 1 sheet for the concatenator and separator. TR-45.3.2/93.12.13.05, RLP1 SDL diagram variables, timers, and parameters (Ericsson), lists and describes all variables, timers, pass parameters, and primitives used in the RLP1 SDL diagrams.

TR-45.3.2/93.12.14.01, Comments on RLP1 Draft 4 (Motorola), proposes five changes to the draft RLP1 standard: 1. Move the example of ARQ operation to an annex. TR-45.3.2 adopted the recommendation. 2. Modify bit and octet order to be consistent with Q.921. TR-45.3.2 deferred the proposal pending the recommendations of a TR-45.3 ad hoc group that is investigating bit transmission order. 3. Change § 4.2, Transmission Order, to § 7.8.1, Encoding Order. § 4.2 should provide a uniform transmission rule for use within the RLP1 reference model. As presently written, it appears a reader could incorrectly interpret the rule as applying to over-the-air transmission. The editor will correct the problem. 4. Rearrange the frame formats to look more like existing HDLC (High-Level Data Link Control) frames. This would not change the specified transmission order; it would just change how the frames are described. TR-45.3.2 adopted the recommendation pending a rewrite of § 4.2. 5. Change the input and outputs from the FCS (Frame Check Sequence) encoder to be consistent with the proposed bit and octet ordering. TR-45.3.2 deferred the proposal pending recommendations from the TR-45.3 ad hoc group.

MT2 DATA CONNECTOR

TR-45.3.2/93.12.13.03 (Chair) forwards TR-45.3.2.5/93.10.12.09 (NovAtel) to TR-30.2 (Data Interfaces Subcommittee). The NovAtel contribution contains five concerns about the MT2 data connector proposed in TR- 30.2 (and manufactured by AMP). These concerns, and the corresponding answers from R. Whiteman (AMP), are as follows:

1. Soldering difficulties The back end of the connector is normally not standardized; this is a manufacturer-vendor issue. TR-30.2 will only standardize the front end of the connector. 2. Large cross section Jack screws and latches require a large cross section. Other locking mechanisms may be used to reduce size.

3. Reliability AMP rates the connector at 2000 cycles. Versions having higher or lower reliabilities may be built.

4. Cabling Cable-mounted versions of the connector use 30 AWG. Designs using 28 AWG may be possible. Connector dimensions and insulation thickness preclude the use of heavier wire gauges.

5. RF (Radio Frequency) leakage AMP has not yet tested shielding performance. They will provide data that compares performance with respect to another well-known connector, e.g., DB-25.

AMP will have plastic samples available for the next TR-45.3 meeting. An AMP representative will be present to answer questions.

OTHER HIGHLIGHTS

TR-45.3.2/93.12.15.01 (Chair) proposes changes to TR-45.3/93.12.13.13, Proposal for Cellular System Dual-Mode Mobile Station – Base Station Digital Control Channel. The contribution, as adopted by TR-45.3.2, comprises two marked up pages from the TR-45.3 contribution. The adopted changes follow:

• Should the Call Mode information element allow the user to indicate which type of channel he prefers, not just which type of channel he will accept? • Since the ATS (Assigned Time Slot) information element supports multirate traffic channels, shouldn’t the Call Mode information element also support multirate channels? • Add a code to the Privacy Mode information element for data privacy.

TR-29/93-10-110 (TR-29 Liaison) is a U.S. contribution to the ITU. It proposes amendments to draft recommendation T.class2 (class-2 fax modem). The amendments support new options included in T.30-1993 (group- 3 fax).

TR-45.3.3, DIGITAL STANDARDS TR-45.3 WG3 develops the all-digital cellular standards.

TR-45.3.3.1, MATRIX TR-45.3.3 Task Group 1 compiles and evaluates proposals for the digital control channel (DCC). TR-45.3.3.1, TR- 45.3.3.3, and TR-45.3.3.4 met jointly. The following report covers the joint meetings.

IS-75, U M INTERFACE — CALL CONTROL (PN-2969)

TR-45.3.3.1 adopted baseline text for IS-75:

TR-45.3.3.1/93.10.12.05, Proposed Base Line Text for Call Control (CC) (TDMA Forum), proposes revised baseline text for IS-75. Most of the revisions are additions to support async-data and fax services.

TR-45.3.3.1/93.11.02.08, Optional Support for Non IS-75 Services (NTI), proposes modifications to the IS-75 Bearer Capability information element. The modifications would allow users to request analog, IS-54 and IS-7X traffic channels. The modifications would also allow users to indicate preference.

P. Meche (NTI) volunteered to take over editorship of IS-75.

TTR-45.3.3.5, MS/BS REQUIREMENTS

PN-3185 AND PN-3186, MINIMUM PERFORMANCE SPECIFICATIONS FOR DIGITAL MOBILE AND BASE STATIONS

TR-45.3.3.5/93.12.13.03 (NTI) presents topics that need to be considered when developing base-station minimum performance requirements for the DCCH (Digital Control Channel). These topics comprise the following: receiver sensitivity, receiver performance under varying receive power, receiver performance versus frequency error, receiver co-channel performance, and receiver delay-interval performance.

OTHER HIGHLIGHTS

TR-45.3.3.5 deferred three channel-model contributions referred from TR-45.3 (TR-45.3/93.12.13.12 from Motorola). See the TR-45.3 report, above.

TR-45.3.4, SYSTEM PERFORMANCE

TR-45.3 WG4 looks at systems issues related to capacity, quality, and complexity. It makes recommendations that lead to development or amendment of cellular standards.

TR-45.3.4/93.12.13.03 (Chair) comprises a schedule chart and task timeline for a project to evaluate IS-54 capacity enhancements. The contribution identifies that two activities must be completed before the working group can issue its second interim report. These activities are as follows:

• Evaluate the capacity of each technique. • Identify other considerations for each technique.

Due to a lack of contributions, TR-45.3.4 decided not to complete these two activities and to issue an incomplete interim report (See TR-45.3.4/93.12.13.04). It also decided to recommend that TR-45.3 suspend the working group. TR-45.3 adopted the recommendation. TR-45.3.4 will be reactivated when TR-45.3 receives a substantive contribution dealing with capacity enhancements.

TR-45.3.4/93.12.13.04 (Chair) is the latest draft of TR-45.3.4’s phase-2 report on IS-54 capacity enhancements. It evaluates the enhancement offered by 9 techniques. Angle brackets within the report indicate areas with missing or incomplete information. The working group will incorporate any remaining information from adopted contributions, and issue an incomplete report at the next TR-45.3 meeting.

TR-45.3.5, SPEECH CODECS

TR-45.3 WG5 develops standards for speech codecs, including IS–85, IS-78, and IS-79.

HALF-RATE CODEC SELECTION

TR-45.3.5/93.12.14.04 (COMSAT) describes functions performed by the host lab and listening lab. The report presents results for experiments 1 and 2. Page 5-11, which identifies the codecs, was deleted from the contribution. TR-45.3.5/93.12.14.08 is the deleted page.

TR-45.3.5/93.12.14.07 (Chairman) summarizes the listening-test results for 8 codecs across four performance gates. No codec passed all four gates. Therefore, no codec was as good as the IS-54 full-rate codec under all conditions. The NEC codec passed 3 of 4 gates. Two codecs, PCSI and Mitsubishi, passed none of the gates and will be dropped from further consideration. COMSAT will proceed with the remaining experiments. The results of experiments 3 and 4 will be released March 7, 1993. The results of experiments 5 and 6 will be released April 4, 1993.

OTHER HIGHLIGHTS

Pending better definition of problem areas, TR-45.3.5 will not meet with its TR-45.5 counterpart to discuss a common TDMA/CDMA codec.

TR-45.3.6, ENHANCED DUAL-MODE STANDARDS

TR-45.3 formed Working Group 6 to consider a proposal for IS-54-C. For the next meeting, J. McQueen (SW Bell) and P. Nurse (Chairman, TR-45.3) will develop a scope and charter. For this meeting, the group met on an ad hoc basis under the chairmanship of D. Holmes (McCaw).

IS-54-C, DUAL-MODE MS-BS COMPATIBILITY

This standard adds DCCs (Digital Control Channels) to IS-54-B. The following contributions were adopted:

TR-45.3/93.12.13.08, Proposed Organization for a Digital Control Channel Compatible Cellular System Standard (McCaw), proposes an organization for IS-54-C. The standard would comprise two parts: IS-54.1 would specify the DCCs; IS-54.2 would specify the traffic channels and FSK control channels. IS-54.2 would include the existing IS- 54-B.

TR-45.3.6/93.12.14.03, Mobile Station Identification for New Versions of IS-54 (McCaw), proposes three new forms of mobile-station identification: IMSI (International Mobile Station Identity), MIN (Mobile Identification Number), and TMSI (Temporary Mobile Station Identity). IMSI is 15 digits long. MIN is part of IMSI and is 10 digits long. TMSI is 20 or 24 bits long. The contribution describes under which conditions each identity should be used.

The following contributions were deferred pending a review by TR-45.3.6:

TR-45.3/93.12.13.13, Proposal for Cellular System Dual-Mode Mobile Station – Base Station: Digital Control Channel (Ericsson, McCaw), proposes text for IS-54.1 as described in TR-45.3/93.12.13.08. The contribution comprises 9 major sections: terminology, general, optional mobile-station facilities, physical layer, layer-2 operation, layer-3 operation, SMS (Short Message Service) higher-layer operation, identification, and mobile-station- specific requirements.

TR-45.3/93.12.13.14, Master/Slave DCCH (HNS), proposes change pages to TR-45.3/93.12.13.13. The changes delete the requirement for a master/slave digital control channel.

SCHEDULE

TR-45.3.6 adopted a development schedule for IS-54-C, IS-55-B, and IS-56-B (TR-45.3.6/93.12.14.02, McCaw). It shows IS-54.1 and IS-54.2 ready for ballot on March 7, 1994, and IS-55 and IS-56 ready for ballot on April 4, 1994.

J. McQueen (SW Bell) presented a supplementary schedule to be used by TDMA carriers for interoperability testing.

OTHER HIGHLIGHTS

TR-45.3.6/93.12.14.04 (NTI) describes features in PN-3165 that enhance or differ from EIA-553. (PN-3165 is a PCS air-interface standard under development in TR-45.4.) Several carriers will review the contribution and recommend which features should be incorporated in IS-54-C.

TR-45.3.6 will set up two task groups: one to review proposals for IS-54-C, and one to review proposals for mobile-station and base-station performance standards.

TR-45.3.6 requested three project numbers: one for IS-54-C, one for IS-55-B, and one for IS-56-B.

Ericsson volunteered to edit IS-54-C, Nokia volunteered to edit IS-55-B, and Motorola volunteered to edit IS-56-B.

T. Watts (SW Bell) volunteered to act as liaison with TR-45.2. He also volunteered to draft first-cut additions to IS- 41, the intersystem operations standard.

Condensed from Cellular TechNotes, December, 1993. Next Generation Information Consulting, Alan Sacuta, V:403 239–4089, F:403-239–4306

TR-45.3 PLENARY ROSTER, DECEMBER 13 – 17, 1993, KIHEI, HI P. Nurse, AT&T Chair, TR-45.3

Bell Mobility Brian O’Shaughnessy NEC America Ed Ornelas Bell Mobility Raymond So Nokia Kimmo Myllymaki BellSouth Cellular Thomas E. Richter Nokia Mark Wells Ericsson GE Ron Bohaychuk NTI Jerry Chow Ericsson GE John Diachina NTI Wing Lo Ericsson GE Al Sacuta NTI Paul Meche Ericsson GE Tony Sammario NTI John Michaelides Ericsson Radio Systems Barry Kratz NTI Kishore Raj Ericsson Radio Systems Filip Lindell NTI Konrad Weimann Ericsson Research Hans Petter Naper Nynex Erkin Çubukçu Hewlett Packard Tom Yeager OKI Steve Hardin Hughes Nework Sys. Dave Wenk Rockwell Tom Inklebarger IFR Systems Bill Steffy Rogers Cantel Bob Berner McCaw Cellular David Holmes Rogers Cantel P.F. Ng McCaw Cellular Adrian Smith Sony Electronics Simon Mizikovsky Motorola Tom Auchter Southwestern Bell Mob. John McQueen Motorola Bob Giometti Southwestern Bell TR Terry Watts Motorola Steve Goode Teknekron Tony Lee Motorola Eric Schorman TI Vishu Viswanatian

TR-45.4/93.12.13.03 is a letter to TR-45.2 informing them that Working Group III is developing an analog air interface standard for Cellular Auxiliary Personal Communications Service (CAPCS).

PN-3142 CELLULAR MICROCELL/MICROSYSTEM REQUIREMENTS DOCUMENT (CMMRD)

TR-45.4/93.12.13.02 is a letter from TR-45.2. In TR-45.2’s review of PN-3142, it identified two additional issues that should be considered: Microcells must be authentication capable; Microsystems must be public access capable. TR-45.4/93.12.13.02 was remanded to Working Group III.

TR-45.4/93.12.15.01 (TR-45.4 Chair) is a letter to TR-45 AHAG requesting that it review PN-3142, the Cellular Microcell/Microsystem Requirements Document.

TR-45.4/93.12.16.02 and TR-45.4/93.12.15.03 are letters to TR-45.2 addressing their concerns about PN- 3142.

WORKING GROUP I - PCS S ERVICE STANDARDS

TR-45.4.1/93.12.15.03 is a working paper of “Service Definition Comparison.” It compares 26 services between PN-2977 (IS-53 Rev. A), PN-3034 (PCS 800), and PN-3168 (PCS 1800).

PN-3141 PCS DEFINITIONS AND ACRONYMS

Working Group I made major editorial modifications to PN-3141. As a result, the completion of V&V was delayed until the next meeting.

TR-45.4.1/93.12.15.02 is baseline text for PN-3141. It was used as a working document for the development of a TSB.

TR-45.4/93.12.13.05 (D. Kuenzer, DSC) suggests additional definitions and comments for possible inclusion in PN-3141. These may be included in a Telecommunications Services Bulletin (TSB).

WORKING GROUP II - MSC TO BS (A-INTERFACE)

PacTel nominated R. Judson as chair of Working Group II (TR-45.4/93.12.13.07). U.S. West nominated A. Johnson (TR-45.4/93.12.13.08). A. Johnson (U.S. West) was elected.

An ad hoc group was formed to discuss WG II definitions of Stage 1, Stage 2 and Stage 3. No resolutions were reached, but useful discussions were conducted. The ad hoc group will meet again in January.

Working Group II has requested a project number for the MSC-BS Interface Requirements.

TR-45.4/93.12.13.11 contains the approved scope and charter for TR-45.4.2: to develop requirements and standards for the A-Interface.

A INTERFACE WORK

TR-45.4/93.12.13.04 (A. Kwok, AT&T) proposes an outline and initial text for the A-Interface requirements document. Working Group II modified and then approved it as a Proposed Outline for the A Interface Standards Requirements Documents. Assignments were given for different sections of the outline, to be distributed before the January meeting.

TR-45.4/93.12.13.09 (F. C. Farrill, Chair of the Cellular Interface Standardization Working Group, CTIA) is a letter enclosing the A-Interface Standard Requirements Document developed by the Cellular Interface Standardization

WG. TR-45.4 accepted this as good input to our own process. The draft document is included in TR- 45.4.2/93.12.14.05, below.

TR-45.4/93.12.13.10 (M. Burke, Motorola) proposes that TR-45.4 take the responsibility for the development of the A-Interface Standard. TR-45.4.2/93.12.14.03 (M. Burke and D. Wood, Motorola) is the December 13, 1993 draft of the A Interface Requirements (Rev 0.1) standard.

TR-45.4.2/93.12.14.04 (Motorola) proposes baseline text for the MSC-BS Interface (A-Interface). It describes the Call Processing, Mobility Management, Handoff and Facilities Management Signaling for the A interface. It provides procedural descriptions, message formats and element codings for all related procedures and supports AMPS (IS-553), NAMPS (IS-88), AMPS-DC (IS-54) and CDMA (IS-95). This contribution is lengthy.

TR-45.4.2/93.12.14.05 (PacTel Corp.) introduces the SRD (Stage 1 description of the A-Interface) as baseline text for the A-Interface. This document was developed by a group of service providers of the CTIA CIS working group (See TR-45.4/93.12.13.09).

TR-45.4.2/93.12.15.01 is the A-Interface work plan as developed by the Working Group, and revised on December 15, 1993: March 1994: Baseline A Stage 1 Requirements June 1994: Baseline Stage 2 Procedures and Message Flows September 1994 :Baseline A Interface Protocols and Formats December 1994: Complete the project.

TR-45.4.2/93.12.15.02 is the A-Interface project plan as developed by the Working Group, and revised on December 15, 1993. This details the deliverables specified in the work plan.

TR-45.4.2/93.12.15.03 is the proposed draft of the Cellular A-Interface Requirements Document. This draft is essentially a table of contents, and is dated December 14, 1993.

WORKING GROUP III - M ICROCELL/MICROSYSTEMS

Task Group 1 decided to develop a work plan for Revision A of the CMMRD, PN-3277.

PN-3165, MOBILE STATION - LAND STATION COMPATIBILITY SPECIFICATION FOR ANALOG CELLULAR AUXILIARY PCS

TR-45.4.3/93.12.13.03 is the meeting summary for the Ad Hoc PCS Air Interface Joint group (AHPAI) (TR- 45.4 and TR-45.1), November 16-18, 1993. The baseline text for PN-3165 was reviewed, editorial changes supported and text frozen with the exception of Appendices B (Recommended Minimum Standards for Cellular-Band Auxiliary PCS Subscriber Stations) and C (Recommended Minimum Standards for Cellular-Band Auxiliary PCS Land Stations). A V&V group was formed and assignments were given. The AHPAI group completed Appendices B & C, and completed V&V for PN-3165. They have recommended PN- 3165 for ballot to become IS-94. TR-45.4/93.12.15.04 is the ballot version of PN-3165, Mobile Station - Land Station Compatibility Specification for Analog Cellular Auxiliary PCS, dated December 14, 1993. TR-45.4.3/93.12.13.04 (J. Avery, MCC/Panasonic) contains the proposed text for Appendix B of PN-3165. This text was incorporated into PN-3165.

TR-45.4.3/93.12.13.05 (C. Huang and B. Dorren, Northern Telecom) contains proposed text for Appendix C of PN- 3165 and some background information. After some discussion the document was approved for addition to PN-3165 as Appendix C.

TR-45.4.3/93.12.13.06 is baseline text for PN-3165 dated December 3, 1993. This was supported as the input for final text.

TR-45.4 ROSTER, DECEMBER 13 - 16, 1993, H OUSTON, TX

Stephen Jones, NEC Chair, TR-45.4 P. J. Louis, Bellcore Vice-Chair, TR-45.4

ADC Kentrox Geoffrey Thompson AT&T Kimberly Harris AT&T Alicia Kwok Bellcore P. J. Louis BellSouth Thomas F. Evans DSC Communications Dick Kuenzer Ericsson Gains Gardner McCaw Ming Zhang Motorola Mike Burke Motorola Joe Pettinger Motorola Ken Skurnak NCS Leonard Brush NEC Stephen Jones NTI Chenhong Huang PacTel Corp Mike Costello PacTel Corp. Huel Hallibruton PacTel Corp. Rick Judson Panasonic John Avery Qualcomm William Buckley Rogers Cantel Watson Zan Southwestern Bell Chuck Bailey Southwestern Bell Bill Litzinger U. S. West New Vector Alan Johnson

ACRONYM DEFINITIONS

AHPAI Ad Hoc PCS Air Interface Joint Group AI Answer Indicator (V.8) API Application Programming Interface AMPS Advanced Mobile Phone Service ARQ Automatic Repeat Request ATS Assigned Time Slot AVI Interactive Audiovisual Services AWG American Wire Gauge BBS Bulletin Board System BFT Binary File Transfer BS Base Station BTA Basic Trading Area BTS Base Transceiver System CA Communication Application (T.611) CBPCM Coded Block Pattern – Chrominance CDMA Code Division Multiple Access CI Call Indicator (V.8) CIF Common Intermediate Format CM Call Menu CME Circuit Multiplication Equipment CMMRD Cellular Microcell/Microsystem Requirements Document CNG T.30 Calling Tone CNI Calling Number Identification CRC Cyclic Redundancy Code CSR Communications Standards Review CTIA Cellular Telecom. Industry Association DCC Digital Control Channel DCCH Digital Control Channel DCE Data Circuit Terminating Equipment DCME Digital Circuit Multiplication Equipment DCS Digital Command Signal (T.30) DIS Digital Identification Signal DTAM Document Transfer Access Method DTC Digital Transmit Command DTE Data Terminal Equipment DTMF Dual Tone Multi Frequency EIA Electronic Industry Association ETSI European Telecom. Standards Institute FCC Federal Communications Commission (U.S.) FCS Frame Check Sequence FPLMTS Future Public Land Mobile Telephone Systems FRAPI-A An ISDN architecture in use in Japan FSK Frequency Shift Keying FTP File Transfer Protocol GSM Groupe Speciale Mobile HDLC High Level Data Link Control HDSL High-rate Digital Subscriber Loop HSD High Speed Data channel HSSI High Speed Serial Interface IEEE Inst. of Electrical and Electronic Engineers IEC International Electrotechnical Comm. IETF Internet Engineering Task Force IMD Intermodulation Distortion IMSI International Mobile Station Identity IP Intelligent Peripheral IPR Intellectual Property Rights

IS Interim Standard ISDN Integrated Services Digital Network ISO International Standards Organization ITU International Telecommunications Union JBIG Joint Binary Image Group JM Joint Menu JPEG Joint Photographics Expert Group JTC Joint Technical Committee LA Local Application (T.611) LBC Low Bit rate Coder LEC Local Exchange Carrier LSD Low Speed Data channel MAP Mobile Application Part MCS Multipoint Control Services (T.122) MCU Multipoint Control Unit MHEG Multimedia & Hypermedia Experts Group MIB Management Information Base MIN Mobile Identification Number MLP MultiLayer Protocol NAMPS Narrowband AMPS NID Network Identification ODA Open Document Architecture ODP Originator Detection Pattern (V.42) OGM Out-Going Message OSI Open System Interconnection PCI Programmable Communications Interface PCN Personal Communications Network PCS Personal Communication Systems PCSC Personal Communications Switching Center PIN Personal Identification Number QCIF Quarter CIF RATERQ Rate Request RM Simple Facsimile Receive SDCC Supplementary Digital Color Code SDL Specification and Description Language SG Study Group (ITU, CCITT) SID System Identification SMS Short Message Service SNMP Simple Network Management Protocol SRD Standards Requirements Document TDMA Time Division Multiple Access TIA Telecommunications Industry Association TMSI Temporary Mobile Station Identity TSB Telecommunication Systems Bulletin (TIA) UDI Unrestricted Digital Information UIM User Identity Module V&V Validate and verify VLC Variable Length Code VLR Visited Location Register WG Working Group

1994 MEETING SCHEDULES AS OF JANUARY 21 - SUBJECT TO CHANGE WITHOUT NOTICE

TR-14.11 Jan 25 - 27 Washington, DC TR-45.5 Jul 18 - 22 Quebec City, Que TR-29 Jan 31-Feb 3 Costa Mesa, CA USNC Jul 19 Washington, DC T1P1 Feb 7 - 11 San Francisco, CA TR-46 Jul 25 - 29 San Antonio, TX JTC(Air) Feb 7 - 11 --- TR-29 Aug 1 - 4 Seattle, WA TR-30 Feb 7 - 11 Plantation, FL TR-45.3 Aug 1 - 4 Calgary, Alb TR-45.2 Feb 7 - 11 Orlando, FL T1P1 Aug 1 - 5 --- TR-45.3 Feb 7 - 11 Gaithersburg, MD JTC(Air) Aug 1 - 5 --- V.34 rap Feb 14 - 15 Plantation, FL TR-30 Aug 8 - 12 Baltimore, MD T1E1 Feb 14 - 18 San Francisco, CA TR-45.2 Aug 15 - 19 Calgary, Alb TR-45.5 Feb 14 - 18 Jekyll Island, GA TR-45.4 Aug 15 - 19 Calgary, Alb TR-45.4 Feb 15 - 17 Houston, TX TR-46 Aug 22 - 26 Irvine, CA TR-46 Feb 28-Mar 4 Vancouver, BC TR-45.3 Aug 29-Sep 2 Toronto, Ont TR-41 Mar 7 - 11 Clearwater, FL TR-41 Sep 12 - 16 Ottawa, Ont TR-45.3 Mar 7 - 11 St. Louis, MO TR-45.2 Sep 12 - 16 Boston, MA TR-45.4 Mar 7 - 11 St. Louis, MO TR-45.5 Sep 12 - 16 Boston, MA TR-45.2 Mar 14 - 18 San Francisco, CA T1E1 Sep 19 - 23 Boston, MA TR-45.5 Mar 14 - 18 San Frandisco, CA TR-46.3 Sep 19 - 23 --- TR-46.3 Mar 21 - 25 --- JTC(Air) Sep 19 - 23 --- JTC(Air) Mar 21 - 25 --- TR-45.3 Sep 26 - 30 Chicago, IL T1A1 Mar 28-Apr 1 Boulder, CO TR-45.4 Sep 26 - 30 Tampa, FL TR-45.3 Apr 4 - 8 RTP, NC T1A1 Oct 3 - 7 --- TR-46 Apr 4 - 8 Reston, VA TR-30 Oct 3 - 7 Portland, OR T1S1 Apr 11 - 15 Eatontown, NJ TR-46 Oct 3 - 7 Lake Tahoe, NV TR-45.2 Apr 11 - 15 Denver, CO T1S1 Oct 10 - 14 --- TR-45.5 Apr 11 - 15 San Diego, CA TR-30 Oct 10 - 14 Portland, OR T1A1 Apr 18 - 22 --- TR-45.2 Oct 17 - 21 Tampa, FL TR-30 Apr 18 - 22 Huntsville, AL TR-45.5 Oct 17 - 21 Coeur d’Alene, ID TR-29 May 2 - 5 Norcross, GA TR-45.3 Oct 24 - 28 San Diego, CA TR-45.3 May 2 - 6 Kirkland, WA TR-29 Oct 31-Nov 3 East Coast TR-45.4 May 2 - 6 Toronto, Ont TR-45.4 Oct 31-Nov 4 Walnut Creek, CA T1P1 May 9 - 13 --- T1P1 Oct 31-Nov 4 --- JTC(Air) May 9 - 13 --- JTC(Air) Oct 31-Nov 4 --- TR-45.2 May 9 - 13 Savannah, GA TR-46 Nov 7 - 11 Austin, TX TR-45.5 May 9 - 13 Savannah, GA TR-45.2 Nov 14 - 18 San Antonio, TX SG D May 11 Washington, DC TR-45.3 Nov 14 - 18 Colorado Spngs, CO SG 15 May 16 - 27 Geneva TR-45.5 Nov 14 - 18 San Diego, CA TR-46 May 16 - 20 Toronto, Ont T1E1 Dec 5 - 9 San Antonio, TX T1E1 Jun 6 - 10 Kansas City, KS TR-30 Dec 5 - 9 Orlando, FL TR-45.2 Jun 6 - 10 Montreal, Que TR-45.5 Dec 5 - 9 Phoenix, AZ TR-45.3 Jun 6 - 10 Montreal, Que TR-46.3 Dec 5 - 9 --- SG 14 Jun 1 - 9 Geneva JTC(Air) Dec 5 - 9 --- TR-45.5 Jun 13 - 17 Victoria, BC TR-41 Dec 12 - 16 Santa Fe, NM TR-46 Jun 13 - 17 El Paso, TX TR-45.2 Dec 12 - 16 Lake Tahoe, NV TR-41 Jun 20 - 24 Salt Lake City, UT TR-45.3 Dec 12 - 16 --- TR-46.3 Jun 20 - 24 --- TR-45.4 Dec 12 - 16 San Antonio, TX JTC(Air) Jun 20 - 24 --- SG 8 Jun 21 - 30 Geneva TR-45.4 Jun 27 - 30 Albuquerque, NM T1S1 Jul 11 - 15 --- TR-45.2 Jul 11 - 15 Vancouver, BC TR-45.3 Jul 11 - 15 Vancouver, BC T1A1 Jul 18 - 22 Burlington, VT

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