EN 301 062-4 : 1.1.1

INTEGRATED SERVICES DIGITAL NETWORK (ISDN); SIGNALLING SYSTEM NO. 7 (SS7); SUPPORT OF VIRTUAL PRIVATE NETWORK (VPN) APPLICATIONS WITH PRIVATE NETWORK Q REFERENCE POINT SIGNALLING SYSTEM NUMBER 1 (PSS1) INFORMATION FLOWS; PART 4: ABSTRACT TEST SUITE (ATS) AND PARTIAL PROTOCOL IMPLEMENTATION EXTRA INFORMATION FOR TESTING (PIXIT) PROFORMA SPECIFICATION

European Telecommunications Standards Institute