DIN EN 300207-4-2002 综合业务数字网(ISDN).转换补充服务.数字用户用1号信令系统(DSS1)协议.第4部分:用户测试形式规范用抽象试验组(ATS)和部分协议实现附加信息
Integrated Services Digital Network (ISDN) - Diversion supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) profo