Digital cellular telecommunications system (Phase 2+) - General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN) (Endorsement of the English version ETS 300976:2000-06 as German standard)
数字蜂窝通信系统(第2+阶段).公共陆地移动网(PLMN)和综合业务数字网(ISDN)或公共交换电话网(PSTN)之间互通的一般要求