ISO/IEC 17343:2007 Information technology – telecommunications and information exchange between systems – corporate telecommunication networks – signalling interworking between QSIG and SIP – basic services

Summary

This International Standard defines the signalling protocol interworking for basic services between a Private Integrated Services Network (PISN) using QSIG and a packet-based private telecommunications network using the Internet Protocol (IP) with SIP. It builds on ITU-T telecommunications concepts and aligns with ISO/IEC’s Open Systems Interconnection standards. The second edition incorporates changes from IETF’s RFC 4497 and aligns technically with it. The standard reflects practical experience from member companies and their participation in international standardization bodies like ISO/IEC JTC 1, ITU-T, and ETSI, representing a broad consensus. Key terms such as “MUST,” “SHALL,” and “SHOULD” follow the requirement levels defined in RFC 2119.