DIN EN 301716-2003 数字蜂窝式远程通信系统(2+相位)(GSM).移动(通信手机)号码可携带业务(MNP)的支持.技术实现.第2阶段
Digital cellular telecommunications system (Phase 2+) (GSM) - Support of Mobile Number Portability (MNP) - Technical Realisation; Stage 2 (GSM 03.66 version 7.3.1 Release 1998) (Endorsement of the English version EN 301716 V 7.3.1 (2000-10) as German stan