| Call waiting supplementary service for H.323 |
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This Supplementary Service describes the procedures and the signalling protocol for the Call Waiting supplementary service (SS-CW) in H.323 (Packet based multimedia communications systems) networks.SS-CW permits a served user while being busy to be informed of an incoming call with an indication. The user then has the choice of accepting, rejecting or ignoring the waiting call. The user calling the busy party is informed about the call waiting condition.This Recommendation makes use of the "Generic functional protocol for the support of supplementary services in H.323" as defined in Recommendation H.450.1. |
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| Citation: |
https://handle.itu.int/11.1002/1000/4677 |
| Series title: |
H series: Audiovisual and multimedia systems
H.200-H.499: Infrastructure of audiovisual services
H.450-H.499: Supplementary services for multimedia |
| Approval date: |
1999-05-27 |
| Approval process: | TAP |
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Status: |
In force |
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Maintenance responsibility: |
ITU-T Study Group 16 |
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Further details: |
Patent statement(s)
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| Ed. |
ITU-T Recommendation |
Status |
Summary |
Table of Contents |
Download |
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1
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H.450.6 (05/1999)
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In force
|
here
|
here
|
here
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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
|
Download
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H Suppl. 6 (04/2006)
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Control load quantum for decomposed gateways
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In force
|
here
|
here
|
here
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H Suppl. 9 (05/2008)
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Gateway control protocol: Operation of H.248 with H.225.0, SIP, and ISUP in support of emergency telecommunications service (ETS)/international emergency preference scheme (IEPS)
|
In force
|
here
|
here
|
here
|
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H Suppl. 11 (02/2009)
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Analysis of class-based home network QoS solutions
|
In force
|
here
|
here
|
here
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H Suppl. 12 (11/2013)
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Gateway control protocol: Priority traffic treatment by ITU-T H.248 gateways
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In force
|
here
|
here
|
here
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H Suppl. 13 (10/2015)
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Gateway control protocol: Common ITU-T H.248 terminology - Release 2
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In force
|
here
|
here
|
here
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H Suppl. 14 (10/2015)
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Gateway control protocol: SDP codepoints for gateway control - Release 2
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In force
|
here
|
here
|
here
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H Suppl. 15 (01/2017)
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Conversion and coding practices for HDR/WCG Y'CbCr 4:2:0 video with PQ transfer characteristics
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In force
|
here
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here
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here
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H Suppl. 17 (11/2014)
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Guide for addressing accessibility in standards
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In force
|
here
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here
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here
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H Suppl. 18 (10/2017)
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Signalling, backward compatibility and display adaptation for HDR/WCG video coding
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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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H Suppl. 19 (04/2021)
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Usage of video signal type code points
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In force
|
here
|
here
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here
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H.450.6 (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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| Title |
Approved on |
Download |
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Testing of personal audio systems for compliance with ITU-T H.870 (2018)
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2024
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Testing of personal audio systems for compliance with ITU-T H.870 (2018)
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2021
|
here
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Telecommunications Accessibility Checklist
|
2006
|
here
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