| 网关控制协议：差错代码和服务变更原因描述 |
在ITU-T H.248.3建议书中的包定义的框架规定了与用户接口单元相关的能力，诸如文本显示、按键、动态标记键、指示符和字母/数字的输入。此外，本建议书还定义了用于电话按键和电话功能键的特别扩展包。
本次修订收录了对集指标信号“状态”和“指标描述”参数的纠正。
注 – 本建议书重新做了编号。本建议书以前被称为ITU-T H.248 建议书附件G。
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| Citation: |
https://handle.itu.int/11.1002/1000/11839 |
| Series title: |
H series: Audiovisual and multimedia systems
H.200-H.499: Infrastructure of audiovisual services
H.240-H.259: Communication procedures |
| Approval date: |
2013-03-16 |
| 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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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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H Suppl. 6 (04/2006)
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Control load quantum for decomposed gateways
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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. 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)
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In force
|
here
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here
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here
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H Suppl. 11 (02/2009)
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Analysis of class-based home network QoS solutions
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In force
|
here
|
here
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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
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here
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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
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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
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here
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here
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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
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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
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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
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here
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here
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here
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H Suppl. 21 (01/2025)
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Film grain synthesis technology for video applications
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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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| Title |
Approved on |
Download |
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Implementers' Guide for ITU-T H.248 Sub-series
|
2017-10-27
|
here
|
| 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)
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2021
|
here
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Telecommunications Accessibility Checklist
|
2006
|
here
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