中国移动通信企业标准彩铃业务总体技术要求版本号：7.0.0中国移动通信集团公司发布╳╳╳╳-╳╳-╳╳发布╳╳╳╳-╳╳-╳╳实施QB-╳╳-╳╳╳-╳╳╳╳GeneralTechnicalSpecificationofColorRingBackTone目录目录................................................................................................................................................I前言..............................................................................................................................................III1.范围.............................................................................................................................................12.规范性引用文件.........................................................................................................................13.术语、定义和缩略语.................................................................................................................14.业务特征.....................................................................................................................................25.系统结构和组网.........................................................................................................................26.业务流程.....................................................................................................................................36.1.2G/3G用户拨打2G/3G用户场景.......................................................................46.1.1.ISUP方式接入核心网的呼叫流程....................................................................46.1.2.无条件前转/关机前转呼叫的正常处理流程....................................................86.1.3.网络决定忙前转/用户不可及前转的正常处理流程......................................106.1.4.无应答前转/用户决定忙前转的正常处理流程..............................................126.1.5.异常情况的处理流程.......................................................................................156.1.6.BICC方式接入核心网的业务呼叫流程..........................................................186.2.4G用户拨打4G用户.........................................................................................266.2.1.正常呼叫流程...................................................................................................266.2.2.与无条件呼叫前转关系...................................................................................286.2.3.遇用户忙呼叫前转(CFB).................................................................................306.2.4.无应答前转关系...............................................................................................326.2.5.被叫不可及前转关系.......................................................................................346.2.6.异常流程...........................................................................................................366.2.7.VPN短号业务场景下IMS话音彩铃的触发流程..........................................376.2.8.呼叫等待业务场景下IMS话音彩铃的触发流程...........................................386.3.4G用户拨打4G用户（被叫漫游到CS域）...................................................396.3.1.正常业务呼叫流程...........................................................................................396.3.2.其他异常情况的处理流程...............................................................................4...
