| H.323系统内的电路图 |
本建议书规定了一种机制，允许PSTN - H.323网关使用电路状态图参数向关守报告线路服务与使用状况。由于业务人员的配置命令或当从相邻的PSTN交换机收到ISUP中断服务或阻塞消息时，网关上的个别PSTN电路可能会中断服务。在这种情况下，网关将能够向关守报告当前电路状态，以使它可以为通过该网关发送的呼叫只从可用线路中选择线路。 |
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| Citation: |
https://handle.itu.int/11.1002/1000/6165 |
| 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: |
2002-11-29 |
| Provisional name: | H.gef.3 |
| Approval process: | AAP |
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Status: |
In force |
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Maintenance responsibility: |
ITU-T Study Group 21 |
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Further details: |
Patent statement(s)
Development history
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| Ed. |
ITU-T Recommendation |
Status |
Summary |
Table of Contents |
Download |
|
1
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H.460.3 (11/2002)
|
In force
|
here
|
here
|
here
|
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|
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ITU-T Supplement
|
Title
|
Status
|
Summary
|
Table of contents
|
Download
|
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H Suppl. 6 (04/2006)
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Control load quantum for decomposed gateways
|
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
|
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
|
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
|
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
|
In force
|
here
|
here
|
here
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H Suppl. 17 (11/2014)
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Guide for addressing accessibility in standards
|
In force
|
here
|
here
|
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
|
In force
|
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
|
In force
|
here
|
here
|
here
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H Suppl. 21 (01/2025)
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Film grain synthesis technology for video applications
|
In force
|
here
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-
|
here
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H.460.3 (2002-11)
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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)
|
2024
|
here
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Testing of personal audio systems for compliance with ITU-T H.870 (2018)
|
2021
|
here
|
|
Telecommunications Accessibility Checklist
|
2006
|
here
|
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