基于分组的多媒体通信系统的呼叫信令协议和媒体流分组 |
ITU-T H.225.0建议书涵盖了H.200和F.720系列建议书定义的窄带可视电话业务的技术要求,在传输路径包括一个或多个分组网络的情况下,每种网络配置和管理可提供与N ISDN不相同的非保证服务质量(QoS),因此对终端要提供强于ITU-T H.320建议书规定的保护或恢复机制。人们注意到ITU-T H.322建议书涉及一些其他LAN的使用, 能够提供ITU-T H.323和H.225,0建议书未做假设的基本性能。本建议书描述了如何管理分组网络上的音频、视频、数据和控制信息以提供H.323设备中的会话业务。产品声明符合H.225.0版本8(本版)的要求则必符合本建议书的所有强制性要求。版本8的产品可通过包含{itu-t (0) recommendation (0) h (8) 2250 version (0) 8}协议标识符值的H.225.0消息识别。本修订包含以下修改:1) 对语言能力交换的增强。2) 修改互联网使用的范围。3) 澄清设施消息可用于启动呼叫转移。 |
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Citation: |
https://handle.itu.int/11.1002/1000/14946 |
Series title: |
H series: Audiovisual and multimedia systems H.200-H.499: Infrastructure of audiovisual services H.220-H.229: Transmission multiplexing and synchronization |
Approval date: |
2022-03-16 |
Approval process: | AAP |
Status: |
In force |
Maintenance responsibility: |
ITU-T Study Group 21 |
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
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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
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here
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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
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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
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here
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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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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 |
Testing of personal audio systems for compliance with ITU-T H.870 (2018)
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2024
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here
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Testing of personal audio systems for compliance with ITU-T H.870 (2018)
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2021
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here
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Telecommunications Accessibility Checklist
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2006
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here
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