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Work item:
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H.225.0 (V8)
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Subject/title:
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Call signalling protocols and media stream packetization for packet-based multimedia communication systems
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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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This Recommendation covers the technical requirements for narrow-band visual telephone services defined in H.200 and F.720-series Recommendations, in those situations where the transmission path includes one or more packet-based networks, each of which is configured and managed to provide a non-guaranteed Quality of Service (QoS) which is not equivalent to that of N-ISDN, such that additional protection or recovery mechanisms beyond those mandated by ITU-T Rec. H.320 need be provided in the terminals. It is noted that ITU-T Rec. H.322 addresses the use of some other LANs which are able to provide the underlying performance not assumed by the ITU-T Recs H.323 and H.225.0.
This Recommendation describes how audio, video, data, and control information on a packet-based network can be managed to provide conversational services in H.323 equipment.
Products claiming compliance with Version 8 of H.225.0 (this version) shall comply with all of the mandatory requirements of this Recommendation. Version 8 products can be identified by H.225.0 messages containing a protocolIdentifier value of {itu-t (0) recommendation (0) h (8) 2250 version (0) 8}.
This revision incorporates the following changes:
1) Enhancements for language capability exchange
2) Modification to the scope regarding use on the Internet
3) Clarification that the Facility message may be used to initiate call transfer
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Comment:
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Not stale. H.225.0 v8 should be consented together with H.323v8 and H.245v17. These two texts are 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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| ITU-T A.5 justification(s): |
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First registration in the WP:
2013-07-19 15:24:50
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Last update:
2022-04-01 16:59:34
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