ETSI EN 300 267-3-1999 综合业务数字网(ISDN).7khz电话,可视电话,声像会议和视频会议电信业务.1号数字用户信令系统(DSS1)协议.第3部分:用户用测试套件结构和测试目的(TSS&TP)规范
Integrated Services Digital Network (ISDN); Telephony 7 kHz, Videotelephony, Audiographic Conference and Videoconference Teleservices; Digital Subscriber Signalling System No. One (DSS1) Protocol; Part 3: Test Suite Structure and Test Purposes (TSS&TP) Sp