ETSI PRETS 300 185-3-1995 综合业务数字网(ISDN).会议呼叫,追加(CONF)补充业务.数字用户1号信令系统(DSS1)协议.第3部分:用户测试套件结构和测试目的(TSS&TP)规范
Integrated Services Digital Network (ISDN); Conference Call, Add-on (CONF) Supplementary Service; Digital Subscriber Signalling System No. One (DSS1) Protocol; Part 3: Test Suite Structure and Test Purposes (TSS&TP) Specification for the User