DIN EN 300286-6-2003 综合业务数字网(IBDN).用户对用户信令(UUS)补充业务.数字用户信令系统1(DSSI)协议.第6部分:网络用抽象试验组(ATS)和部分协议执行附加检测信息形式表规范(PIXIT)
Integrated Services Digital Network (ISDN); User-to-User Signalling (UUS) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Te