LST EN 301 491-1 V1.1.2-2007 Private Integrated Services Network (PISN);Inter-exchange signalling protocol;Call offer supplementary service;Part 1: Test Suite Structure and Test Purposes (TSS&TP) specification
2007LST EN 301 491-1 V1.1.2-2007 Private Integrated Services Network (PISN);Inter-exchange signalling protocol;Call offer supplementary service;Part 1: Test Suite Structure and Test Purposes (TSS&TP) specification