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Inband and Outband Signalling Protocols; a Survey

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Inband and Outband Signalling Protocols; a Survey ETSI ETR 227 TECHNICAL November 1995 REPORT Source:ETSI TC-TE Reference:DTR/TE-10011 ICS: 33.020 Key words: multimedia, protocols Multimedia applications and services; Inband and outband signalling protocols; A survey ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [email protected] Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16 Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. New presentation - see History box © European Telecommunications Standards Institute 1995. All rights reserved. Page 2 ETR 227: November 1995 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to "ETSI Editing and Committee Support Dept." at the address shown on the title page. Page 3 ETR 227: November 1995 Contents Foreword .......................................................................................................................................................7 1 Scope ..................................................................................................................................................9 2 References..........................................................................................................................................9 3 Definitions and abbreviations ............................................................................................................20 3.1 Definitions ..........................................................................................................................20 3.2 Abbreviations .....................................................................................................................21 4 Protocols for teleservices ..................................................................................................................24 4.1 ISDN Videotex scheme......................................................................................................24 4.1.1 Data syntaxes applicable to Videotex terminals............................................25 4.1.2 ISDN "circuit mode".......................................................................................25 4.1.3 ISDN "packet mode"......................................................................................25 4.1.4 PSTN "packet mode".....................................................................................25 4.1.5 Conformance testing .....................................................................................25 4.1.6 Protocol stack for ISDN Videotex..................................................................26 4.2 ISDN facsimile scheme......................................................................................................26 4.2.1 Overview........................................................................................................26 4.2.2 Protocols for group 4 facsimile on ISDN .......................................................26 4.2.3 Conformance testing for group 4 facsimile ...................................................27 4.2.4 Protocols for group 3 facsimile on ISDN .......................................................27 4.3 Audiovisual basic scheme .................................................................................................27 4.3.1 Basic scheme for ISDN .................................................................................27 4.3.1.1 Overview..............................................................................27 4.3.1.2 Description...........................................................................28 4.3.2 Basic scheme for B-ISDN .............................................................................30 4.3.2.1 Overview..............................................................................30 4.3.2.2 Adaptation of N-ISDN audiovisual terminals to B-ISDN ......30 4.3.2.3 Broadband audiovisual communication...............................30 4.3.3 Very low bitrate visual telephony ...................................................................31 4.4 Multipoint communication scheme.....................................................................................31 4.4.1 Overview........................................................................................................31 4.4.2 Protocol stacks..............................................................................................33 4.4.3 Status of T.120 series of Recommendations ................................................36 5 Protocols for data communication services ......................................................................................36 5.1 Introduction ........................................................................................................................36 5.2 OSI protocol stack .............................................................................................................37 5.2.1 Electronic mail ...............................................................................................37 5.2.2 Interactive multimedia services .....................................................................40 5.2.2.1 MHEG..................................................................................40 5.2.3 Data conferencing .........................................................................................41 5.2.4 File transfer ...................................................................................................42 5.2.4.1 Protocol stack for file transfer using the FTAM profile (ETS 300 388) .....................................................................42 5.2.4.2 Protocol stack for file transfer using the Eurofile Transfer Profile (ETS 300 383) ..........................................................43 5.2.5 Virtual Terminal .............................................................................................43 5.2.6 Document Filing and Retrieval (DFR) ...........................................................43 5.2.7 Document Transfer and Manipulation (DTAM) .............................................44 5.2.7.1 Document Transfer and Manipulation - Bulk Transfer - Normal Mode .......................................................................44 5.2.7.2 Document Transfer and Manipulation - Document manipulation (DTAM-DM)....................................................45 5.3 Internet protocol stack .......................................................................................................46 Page 4 ETR 227: November 1995 5.3.1 Electronic mail .............................................................................................. 46 5.3.2 Interactive information services .................................................................... 47 5.3.2.1 World Wide Web................................................................. 47 5.3.2.2 Wide Area Information Services ......................................... 47 5.3.2.3 Gopher ................................................................................ 47 5.3.3 Data conferencing systems .......................................................................... 47 5.3.3.1 Network News..................................................................... 47 5.3.3.2 Internet Relay Chat ............................................................. 47 5.3.4 File Transfer.................................................................................................. 48 5.3.5 Virtual Terminal............................................................................................ 48 6 media formats................................................................................................................................... 48 6.1 Video coding schemes ...................................................................................................... 48 6.1.1 Overview....................................................................................................... 48 6.1.2 Applications and requirements ..................................................................... 49 6.1.2.1 Real-time conversational applications ................................ 49 6.1.2.2 Non-real-time distributional like applications....................... 49 6.2 Still picture......................................................................................................................... 50 6.2.1 JPEG ............................................................................................................ 50 6.2.2 ITU-T Recommendation H.261 still picture mode ........................................ 50 6.3 Audio coding schemes ...................................................................................................... 52 6.3.1 Introduction ................................................................................................... 52 6.3.2 Requirements ............................................................................................... 52 6.3.3 Standards ..................................................................................................... 53 6.4 Multimedia document formats..........................................................................................
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