DIN EN 301827:2004
专用综合业务网.局间信令协议.无线终端呼叫处理附加网络特性
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Wireless terminal call handling Additional Network Feature (ANF) (ISO/IEC 15431 (2003), modified) (Endorsement of the English version EN 301827 V1.1.1 (2004-01) as German st