EN 300 356-36 : 3.3.1

INTEGRATED SERVICES DIGITAL NETWORK (ISDN); SIGNALLING SYSTEM NO. 7 (SS7); ISDN USER PART (ISUP) VERSION 3 FOR THE INTERNATIONAL INTERFACE; PART 36: ABSTRACT TEST SUITE (ATS) AND PARTIAL PROTOCOL IMPLEMENTATION EXTRA INFORMATION FOR TESTING (PIXIT) PROFORMA SPECIFICATION FOR SUPPLEMENTARY SERVICES

European Telecommunications Standards Institute