Communications Standards Review Telecommunications
Total Page:16
File Type:pdf, Size:1020Kb
COMMUNICATIONS STANDARDS REVIEW TELECOMMUNICATIONS Volume 6, Number 8 December 1995 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. TR-29, Facsimile Systems and Equipment, October 16 – 18, 1995, San Diego, CA.........................................3 TR-29.1 Facsimile and File Transfer Protocols............................................................................... 4 TR-29.2 Facsimile Digital Interfaces........................................................................................... 7 TR-29.3 Audiographic Conferencing........................................................................................... 10 TR-29.4 Secure Facsimile......................................................................................................... 10 TR-29 Partial Meeting Roster, October 16 – 18, 1995, San Diego, CA..................................................12 The Very Low Bitrate Visual Telephony, October 17 – 20, 1995, Darmstadt, Germany.................................... 13 Video Coder (H.263)................................................................................................................ 13 Speech Coder (G.723).............................................................................................................. 14 Multiplex (H.223).................................................................................................................. 17 Communication Control (H.245)................................................................................................ 18 System (H.324)...................................................................................................................... 18 Mobile (AV.32M)................................................................................................................... 20 H.263L Future Video Coder........................................................................................................ 22 H.324 Testing....................................................................................................................... 22 DTE/DCE Interface.................................................................................................................. 23 Non-Conversational Services.................................................................................................... 23 Ad Hoc Committees................................................................................................................. 24 LBC Rapporteur’s Meeting Roster, October 17 – 20, 1995, Darmstadt, Germany..................................... 25 Experts Group Meeting On G.DSVD, October 23 – 25, 1995, Geneva, Switzerland......................................... 26 G.DSVD Experts Meeting Roster, October 23 – 25, 1995, Geneva, Switzerland....................................... 29 TR-30, Data Transmission Systems and Equipment, November 13 – 17, 1995, Orlando, FL..............................30 TR-30.1 Modems................................................................................................................... 30 TR-30.2, Data Transmission...................................................................................................... 32 TR-30.3 Data Communication Equipment Evaluation and Network Interfaces.......................................... 33 TR-30.4 DTE-DCE Protocols..................................................................................................... 35 TR-30 Meeting Roster, November 13 – 17, 1995, Orlando, FL...........................................................37 SG 15 Transmission Systems, WP 1 and WP 2, November 14 – 22, 1995, Geneva, Switzerland......................... 38 SG 15 WP 1, Audiovisual/Multimedia........................................................................................... 38 Q3/15 Multimedia Harmonization............................................................................................... 42 Study Questions for the Next ITU Study Period................................................................................ 43 JCG/AVMMS........................................................................................................................ 43 SG 15 WP 2, Voice Processing and Operation Function..................................................................... 44 SG 15 WP 1 and WP 2 Meeting Roster, November 14 – 22, 1995......................................................... 50 ETSI Terminal Equipment (TE) Plenary Meeting, November 27 – December 1, 1995, Antwerp, Belgium............... 52 Multimedia Management Group (MMG)........................................................................................ 52 SRC6 Implementation Starter Group............................................................................................ 52 TE1, Telematic and retrieval services........................................................................................... 52 December 1995 Vol. 6.8 Copyright © CSR 1995 1 COMMUNICATIONS STANDARDS REVIEW – TELECOMMUNICATIONS TE2, Telematic Terminals......................................................................................................... 53 TE3, Message Handling System.................................................................................................. 54 TE4, Audiovisual and Voice Terminals.......................................................................................... 54 TE5, Terminal access to public networks....................................................................................... 55 TE6, Directory Systems............................................................................................................ 56 TE9, Card Terminals................................................................................................................ 56 CEC related matters................................................................................................................. 57 Standards Management............................................................................................................. 57 Liaisons............................................................................................................................... 58 Other Highlights.................................................................................................................... 59 ETSI TE Plenary Meeting Roster, November 27 – December 1, 1995, Antwerp, Belgium............................ 59 Acronym Glossary........................................................................................................................ 61 1996 Meeting Schedules as of December 21, 1995................................................................................. 63 2 Vol. 6.8 Copyright © CSR 1995 December 1995 COMMUNICATIONS STANDARDS REVIEW – TELECOMMUNICATIONS REPORT OF TR-29, FACSIMILE SYSTEMS AND EQUIPMENT OCTOBER 16 – 18, 1995, SAN DIEGO, CA TIA-536 and TIA-537, US G4 standards, are being balloted for rescission. S. Urban noted that TIA-538 (T.6) is up for renewal. TIA-466-A (US standard equivalent to T.30 as of 1993 with some additions) was ready to be published. TIA-465-A (US standard equivalent to T.4) has been published. S. Urban noted that some concerns had been raised with the ITU test charts because they are slightly wider than 8.5 inches to present the maximum scan line width. He asked if others have had difficulties with the wider dimension. M. Moldovan (Genoa), Fax Testing Editor, has a draft of PN-3194, the TSB on conformity fax testing, at ftp.gentech.com directory pub 3194.doc. H. Silbiger (AT&T) presented TR-29/95-10-49©, Draft Recommendation T.svf, Application Profiles for Simultaneous Voice and Facsimile Terminals (based on V.61), for information. For existing machines that have voice I/O (games machines and standalone fax), no additional standards for the digital interface would be needed. K. Krechmer (ACTION Consulting) resigned as Secretary of TR-29; J. Rafferty (Human Communications) agreed to take over as secretary. LIAISONS V. Cancio (Xerox), the new chair of TR-29.2, reported on the TR-29.2 meeting (see full report below). With respect to the MFPI (MultiFunction Peripheral Interface) project, R. Lutz (Cognisys) will review the addition of MLC (Multiple Logical Channel) into IS-650 (MFPI, PN-1906). He will ask Hewlett Packard to submit the MLP (Multi-Layer Protocol) to the next TR-29.2 meeting to determine the status of the IPR (Intellectual Property Rights) issues. Also, additional physical layer interfaces were supported (e.g., USB, serial ports). The issue of Class 3 and the use of job submission was discussed. There was discussion about removing the Class 3 references from T.31 (Class 1) and T.32 (Class 2). This will effectively occur when the US accepts the use of T.31 and T.32 in place of Class 1 and Class 2. K. Krechmer (ACTION Consulting) presented draft T.610, TR-29.2/95-10-52 (R. Goldstein, Q1/8 Rapporteur), which is an overview of T.611. K. Krechmer noted the direction of the T.610 work to include voice and related near real time operation. He indicated the desire to see the work in T.611 included in future job submission efforts. S. Urban (Delta Information Systems) noted that work is progressing in ISO/IEC JTC1 WG1 SC29 on near lossless JBIG (Joint Binary Image Group) and JPEG (Joint Photographics Expert Group) compression. These algorithms can be tuned to select a compression ratio relative