Network-specific data protocol stacks for multimedia conferencing |
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ITU-T Recommendation T.123 specifies network-specific aspects of the T.120-series data protocols for multimedia conferencing. The networks currently identified are ISDN, CSDN, PSDN, PSTN, B-ISDN, and LAN. Communication profiles are specified which provide reliable point-to-point connections between a terminal and a multipoint control unit, between pairs of terminals or between pairs of MCUs. In some cases, a lower protocol layer allows the multiplexing of audio and video signals in addition to data connections. In other cases, separate calls, over the same or a different network, may be established to carry audio or video signals.In addition, Annex B specifies a protocol that may be used to negotiate connection services beyond reliable data transfer. This protocol also provides for the use of alias address lists when making a connection. Alias lists will allow proxy services for T.120 communications to be created and used.This revised version of ITU-T Recommendation T.123 introduces a number of clarifications to the previous version. |
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Citation: |
https://handle.itu.int/11.1002/1000/9046 |
Series title: |
T series: Terminals for telematic services T.120-T.149: Data protocols for multimedia conferencing |
Approval date: |
2007-01-13 |
Approval process: | AAP |
Status: |
In force |
Maintenance responsibility: |
ITU-T Study Group 16 |
Further details: |
Patent statement(s)
Development history
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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T Suppl. 1 (11/2004)
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Conformance testing requirements for Recommendations of the T.170-series
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In force
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here
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here
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here
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