DIN EN 302092-4:2001 宽带综合业务数字网(B-ISDN)和宽带专用综合业务网(B-PISN).数字用户信令系统No.2(DSS2)、宽带局间信令(B-QSIG)和信令系统No. 7(SS7).预谈判.第4部分:抽象试验组(ATS)和试验用部分协议实施附加信息(PIXIT)格式规范
Broadband Integrated Services Digital Network (B-ISDN) and Broadband Private Integrated Services Network (B-PISN) - Digital Subscriber Signalling System No. two (DSS2); Broadband Inter-Exchange Signalling (B-QSIG) and Signalling System No. 7 (SS7); Preneg