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.

NOTE 1: The parts of EN 301 048 [6] included are those which are equivalent to ETS 300 172 [4] annex ZB.

NOTE 2: The ATS in the present document can also be used for testing equipment implemented according to certain other PSS1 specifications.

The ISO standard for the methodology of conformance testing (ISO/IEC 9646-1 [7], ISO/IEC 9646-2 [8] and ISO/IEC 9646-3 [9]) is used as basis for the test methodology.

The present document is applicable to implementations which support either a Basic Rate or a Primary Rate access interface, or both, operating over a leased line. It is applicable to various PINX roles, i.e. Originating, Terminating, Transit, Incoming/Outgoing Gateway.

NOTE 3: The present document can also be applicable to other scenarios if the scenario concerned does not rely on extensions to the protocol for basic call defined in the mapping specification (e.g. the use of National Standard codepoints in the Bearer Capability IE) or support more than 30 information channels. For scenarios which do not satisfy these conditions some test cases can be unsuitable and/or require modifications.

Annex A provides the Partial Protocol Implementation eXtra Information for Testing (PIXIT) Proforma of this specification.

Annex B provides the Protocol Conformance Test Report (PCTR) Proforma of this specification.

Annex C provides the Tree and Tabular Combined Notation (TTCN) part of this specification.