European digital cellular telecommunications system (Phase 2); Signalling requirements on interworking between the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN) and the Public Land Mobile Network (PLMN) (GSM 09.03)
欧洲数字蜂窝通信系统(第二阶段);综合业务数字网(ISDN)或公共交换电话网(PSTN)与公共陆地移动网(PLMN)之间互通的信令要求(GSM 09.03)