ETSI PRETS 300 609-2-1998 数字蜂窝通信系统(第2阶段).基站系统(BSS)设备规范.第2部分:信令方面.第3版.GSM 11.23(版本4.9.0)
Digital Cellular Telecommunications System (Phase 2); Base Station System (BSS) Equipment Specification; Part 2: Signalling Aspects Third Edition; GSM 11.23 Version 4.9.0