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Work item:
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H.245 (V17)
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Subject/title:
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Control protocol for multimedia communication
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Status:
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Approved on 2022-03-16 [Issued from previous study period]
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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Rev.
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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IETF
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Supporting members:
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-
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Summary:
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Recommendation ITU-T H.245 specifies syntax and semantics of terminal information messages as well as procedures to use them for in-band negotiation at the start of or during communication. The messages cover receiving and transmitting capabilities as well as mode preference from the receiving end, logical channel signalling, and Control & Indication. Acknowledged signalling procedures are specified to ensure reliable audiovisual and data communication.
Products claiming compliance with Version 17 of ITU-T H.245 shall comply with all of the mandatory requirements of this Recommendation. Version 17 products can be identified by ITU-T H.245 TerminalCapabilitySet messages containing a protocolIdentifier value of {ITU-T (0) recommendation (0) h (8) 245 version (0) 17}.
Relative to ITU-T H.245 Version 16 (2011), this version incorporates the following changes:
– Add procedures in Annex V to support better interoperability between IPv4 and IPv6 devices
– Updated Table VIII.1 to support the revisions made to H.241
– Support of an SCTP media transport in H.323 systems, including the addition of Annex U
– Support of DTLS media transport in H.323 systems, including the addition of Annex U
– Support of out of band data channel establishment for Annex U
– Propose updates to H.245 to support SCTP: split dtls-sctp into udp-dtls-sctp and tcp-dtls-sctp
– Add ExtendedAudioCapability and ExtendedDataCapability in H.245
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Comment:
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Not stale. This draft revised Recommendation is in a stable state and can be Consented as soon as the IETF references in them are resolved.
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Reference(s):
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Historic references:
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Contact(s):
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First registration in the WP:
2011-10-06 16:17:54
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Last update:
2022-04-01 17:07:50
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