The present document specifies the Test Suite Structure and Test Purposes (TSS&TP) for the Advice of charge
supplementary services of the Interexchange signalling protocol for Private Integrated Services Networks (PISN).
The objective of this TSS and TPs specification is to provide conformance tests which give a greater probability of
inter-operability. The TSS and TPs specification covers the procedures described in ETS 300 257 [1].
The ISO standard for the methodology of conformance testing (ISO/IEC 9646-1 [2], ISO/IEC 9646-2 [3] and
ISO/IEC 9646-3 [7]) is used as basis for the test methodology.
The Test Suite Structure and Test Purposes specified in the present document are only intended for VPN scenarios at
the "b" service entry point.
The VPN "b" service entry point is defined in EN 301 060-1 [4] and ETR 172 [5].