ETSI EN 300 138-5-2002 综合业务数字网(ISDN).1号数字用户信令系统(DSS1)协议.呼叫等待(CW)补充业务.第5部分:网络用测试套件结构和测试目的(TSS&TP)规范(版本3.1.1)
Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. One (DSS1) Protocol; Close User Group (CUG) Supplementary Service; Part 5: Test Suite Structure and Test Purposes (TSS&TP) Specification for the Network (V3.1.1)