ETSI EN 301 491-1-2000 专用综合业务网(PISN).内部交换信令协议.呼叫提供补充业务.第1部分:测试套件结构和测试目的(TSS&TP)规范(版本1.1.1)
Private Integrated Services Network (PISN); Inter-Exchange Signalling Protocol; Call Offer Supplementary Service; Part 1: Test Suite Structure and Test Purposes (TSS&TP) Specification (V1.1.2)