ETSI GSM 08.08-1994 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)接口第3层规范(PRETS 300 590,版本4.9.0)
European Digital Cellular Telecommunication System (Phase 2); Mobile-Services Switching Centre - Base Station System (MSC - BSS) Interface Layer 3 Specification (PRETS 300 590 Version 4.9.0)