CAN/CSA-ISO/IEC-11572-94

The international community has decided to make this standard available only in the English language version. It has been adopted as a National Standard of Canada on this basis. This National Standard of Canada is equivalent to International Standard ISO/IEC 11572:1994. 1 Scope This International Standard defines the signalling procedures and protocol for the purpose of circuit-switched Call Control at the Q-reference point between Private Integrated Network Exchanges (PINXs) connected together within a Private Integrated Services Network (PISN). This standard is part of PSS1, being defined by ISO for PISNs. This International Standard is based upon that described in CCITt recommendations Q.930 and Q.931 (Blue Book, 1988), including the provisions for symmetrical operation described in annex D of that recommendation. NOTE - The signalling procedures and protocol defined in this International Standard satisfies the requirements identified in ISO/IEC 11574.