DIN EN 302646-3:2001
综合业务数字网(ISDN).信令系统No.7.数字蜂窝通信系统.ISDN公共地面移动网信令接口的ISDN用户部分的应用版本3.第3部分:成套试验装置及试验目的 规范
Integrated Services Digital Network (ISDN); Signalling System No. 7 (SS7) - Digital cellular telecommunications system (Phase 2+); Application of ISDN User Part (ISUP) version 3 for the ISDN-Public Land Mobile Network (PLMN) signalling interface - Part 3: