ETSI PRETS 300 092-4-1997 综合业务数字网(ISDN).主叫线路识别表示(CLIP)补充业务.数字用户1号信令系统(DSS1)协议.第4部分:抽象测试套件(ATS)和部分协议额外测试信息实现
Integrated Services Digital Network (ISDN); Calling Line Identification Presentation (CLIP) Supplementary Service; Digital Subscriber Signalling System No. One (DSS1) Protocol; Part 4: Abstract Test Suite (ATS) and Partial Protocol Implementation eXtra In