ITU-T Q.3940 PDF

This Recommendation defines the tests purposes (TPs) for next generation network (NGN) IP multimedia subsystem (IMS) interconnection tests between national and international network operators, covered by ITU International Telecommunication Regulations, at the IMS interconnection (Ic) interface and NGN network-to-network interface (NNI)/SIP-I. Such tests have been developed to verify the overall compatibility of the session initiation protocol (SIP), the integrated services digital network (ISDN) and the non-ISDN (public switched telephone network (PSTN)) over the national or international NGNs, with regard to the use of end devices in the relevant networks (recommended by the network operator). The test specifications cover the procedures described in [ITU-T Q.1912.5] for Profile C (SIP-I).

The specified test purposes are the basis for bilateral tests between national or international network operators. If the test between network operators is agreed, the test purposes are performed as defined in the current Recommendation. Any modification of the requirements described in, and based on, national requirements, needs additional test purposes that are not described in the current Recommendation. Any additional test may be defined and agreed between the test staff of the network operators.

This Recommendation is technically equivalent to and compatible with [b-ETSI TS 101 585].