scope:

The present document specifies the Test Suite Structure (TSS) and Test Purposes (TPs) for the Network Layer, Circuit Mode Basic Services of the Inter-exchange signalling protocol for Private Integrated Services Networks (PISN). The objective of this TSS and TPs pecification is to provide conformance tests which give a high probability of inter-operability of the Network Layer. The TSS and TPs specification covers the procedures described in EN 300 172 [2]. In addition this TSS&T P specification covers those parts of EN 301 048 [1] which relate to the use of the transit counter in connection with Basic Call procedures.