中国移动通信企业标准中国移动CM-IMS会话初始协议（SIP）技术规范第五部分：SIP与BICC/ISUP的互通CM-IMSSpecificationsofSessionInitiationProtocol(SIP)Part5:InterworkingbetweenSIPandBICC/ISU版本号：1.0.0中国移动通信集团公司发布2011-7-27发布2011-7-27实施QB-C-018.5-2011目录前言............................................................................................................................................IV1.范围..........................................................................................................................................12.规范性引用文件.......................................................................................................................13.术语、定义和缩略语...............................................................................................................24.信令面互通和用户面互通.......................................................................................................34.1.互通模型..........................................................................................................................34.2.信令面互通.......................................................................................................................34.2.1.SIP与BICC信令面互通.........................................................................................34.2.2.SIP与ISUP信令面互通..........................................................................................44.3.用户面互通.......................................................................................................................44.3.1.SIP与BICC用户面互通协议栈.............................................................................44.3.2.SIP与ISUP用户面互通协议栈..............................................................................55.SIP与ISUP的互通.................................................................................................................55.1.从SIP到ISUP的互通.....................................................................................................55.1.1.发送IAM消息.........................................................................................................55.1.2.IAM消息的编码......................................................................................................65.1.3.发送COT消息.........................................................................................................65.1.4.发送180消息...........................................................................................................65.1.5.为早媒体场景发送183消息...................................................................................75.1.6.发送200OK消息（接收到ANM、CON消息）.................................................95.1.7.内部承载导通...........................................................................................................95.1.8.收到REFER消息...................................................................................................105.1.9.I-IWU侧的释放过程.............................................................................................105.2.从ISUP到SIP的互通...................................................................................................145.2.1.发送INVITE消息........................................................................
