Standard No.:	GB/T 21640-2008
Chinese Name:	基于IP网络的视讯会议系统设备互通技术要求
English Name:	Technical standards for cooperation between equipments of IP-based video conference system
Professional Classification:	M33 Optical communication equipment
Professional Classification:	GB National Standard
ICS Classification:	33.040
Issued by:
Issued on:	2008-04-10
Implemented on:	2008-11-01
Status:	VALID
Language:	English
File Format:	PDF
Word Count:	36000 words
Price(USD):	1080 (USD)
Delivery:	via email in 1-8 business day

前言Ⅲ
1范围1
2规范性引用文件1
3术语和定义1
4缩略语2
5RTP消息及其详细参数3
6RAS消息及其详细参数3
6.1网守发现消息3
6.2注册消息5
6.3注销消息6
6.4接入认证消息6
6.5地址解析消息11
6.6拆除连接消息13
6.7带宽管理消息14
6.8状态消息15
6.9资源报告消息15
6.10业务控制消息15
6.11RAS消息的请求进展消息(RIP)16
7ITU-TQ.931消息及其详细参数16
7.1Setup-UUIE16
7.2CallProceeding-UUIE17
7.3Alerting-UUIE17
7.4Connect-UUIE18
7.5ReleaseComplete-UUIE18
8ITUTH.245消息及其详细参数18
8.1逻辑信道建立相关消息19
8.2会议请求和响应消息20
8.3会议命令22
8.4杂项指示23
8.5会议指示23
9ITU-TH.248消息24
9.1命令24
9.2描述符27
9.3ITU-TH.248包28
10ITU-TH.281,ITU-TH.282,ITU-TH.283消息及其详细参数(设备控制)35
10.1ITU-TH.281消息结构35
11RADIUS协议与参数36
12流程38
12.1注册流程38
12.2会议预约流程41
12.3会议召集流程44
12.4会议结束流程50
12.5注销流程55
12.6主席控制流程56
12.7设备控制流程59
13语音/视频编码60
13.1语音编码和帧结构60
13.2图像编码和帧结构60
14错误值和原因码61
14.1ITU-TH.248消息的原因值61
14.2ITU-TH.248消息的错误码61
15ITU-TH.248消息的定时器和重发次数63
16RAS消息的定时器和重发次数63
17ITU-TQ.931消息的定时器和重发次数63
附录A(规范性附录)相关消息的ASN.1描述64