scope:

The present document specifies the Abstract Test Suite (ATS) for the Network Layer, Circuit Mode Basic Services of the Inter-exchange signalling protocol, for Private Integrated Services Networks (PISN). The objective of the present document is to provide conformance tests which give a high probability of inter-operability of the Network Layer. The present document covers the procedures described in EN 300 172 [3] and those parts of EN 301 048 [6] which relate to the use of the transit counter in connection with Basic Call procedures.