ETSI GSM 08.06-1998 数字蜂窝通信系统(第2+阶段).基站系统-移动业务交换中心(BSS-MSC)接口信令传输机制规范(版本5.2.0)
Digital Cellular Telecommunications System (Phase 2+); Signalling Transport Mechanism Specification for the Base Station System - Mobile-Services Switching Centre (BSS - MSC) Interface