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 |
本建议书包括H.200和F.720系列建议书中定义的窄带可视电话业务的技术规范,在传输路径包括一个或多个基于分组的网络的那些情况中,每个基于分组的网络的构成都要设法提供不保证的服务质量(QoS),即不等效于N-ISDN的服务质量,超出ITU-T H.320建议书管理范围的那些附加的保护或恢复方法需要在终端中提供。注意到ITU-T H.322建议书提出使用某些其他的LAN,这些LAN能够提供ITU-T H.323建议书和H.225.0建议书未设想的基本操作。本建议书描述基于分组的网络上音频、视频、数据和控制信息能够如何管理以提供H.323设备中的会话业务。遵循第7版H.225.0(本版本)的产品声明应遵循本建议书的所有强制性要求。第7版产品应由包含{itu-t(0)recommendation (0)h (8)2250 version(0)6}的protocolIdentifier值的H.225.0消息标识。此次修订包括以下修改:1) 纠正了H.323-系列实施者指南指出的缺陷,其中包括:a) 编辑修改,b) 在对信息要素长度进行说明时指出,"*" 是指未定的最大长度,c) 在设置知识、状态和状态查询信息中对用户 – 用户信息要素做了说明,d) 在H.225.0 ReleaseComplete和通知信息中增加目的地信息(destinationInfo)域;2) 收录多语种主叫和被叫方识别;3) 对H.225.0第7.1款的呼叫信令消息错误的处理做了说明。
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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.225.0 (2009-12)
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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 |
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
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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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