ETSI GSM 08.06-1994 欧洲数字蜂窝通信系统(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
European Digital Cellular Telecommunications System (Phase 2); Signalling Transport Mechanism Specification for the Base Station System - Mobile-Services Switching Centre (BSS - MSC) Interface