DIN EN 301483-1:2001 专用综合业务网(PISN).内部交换信令协议.补充业务建议.第1部分:成套试验装置及试验目的规范
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol; Advice of Charge (AoC) supplementary services (ISO/IEC 15049 (1997), modified) - Part 1: Test Suite Structure and Test Purposes (TSS&TP) specification (Endorsement of the Eng