Digital cellular telecommunications system (Phase 2+) - GSM Cordless Telephony System (CTS), Phase 1 - CTS supervising system layer 3 specification (GSM 04.57 version 8.0.1 Release 1999) (Endorsement of the English version EN 302407 V8.0.1 (2000-08) as German standard)
数字蜂窝通信系统(第2+阶段).GSM无绳电话系统(CTS) 第1阶段.CTS监控系统第3层规范(GSM 04.57版本8.0.1 1999年发布)(认可英语版本EN 302407 V8.0.1(2000-08)为德国标准)