| Network-specific data protocol stacks for multimedia conferencing |
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This Recommendation 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. |
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| Citation: |
https://handle.itu.int/11.1002/1000/4663 |
| Series title: |
T series: Terminals for telematic services
T.120-T.149: Data protocols for multimedia conferencing |
| Approval date: |
1999-05-27 |
| Approval process: | TAP |
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Status: |
Superseded |
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Maintenance responsibility: |
ITU-T Study Group 21 |
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Further details: |
Patent statement(s)
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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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T.123 (1999-05)
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Index of all ASN.1 assignments defined in this Recommendation.
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Click
here
to download all the modules of this Recommendation (zipped archive)
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Click here to download all the modules needed to compile this Recommendation (zipped archive)
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