scope:

This European Telecommunication Standard (ETS) contains the Abstract Test Suite (ATS) specification for the Data Link Layer (DLL) of the Private Integrated Services Network (PISN), Inter-exchange signalling protocol.

The objective of the present document is to provide conformance tests which give a high probability of inter-operability of the Data Link Layer (DLL). The present document covers the procedures described in ETS 300 402-2 [1] annex ZA.

The ISO standard for the methodology of conformance testing (ISO/IEC 9646-1 [2], ISO/IEC 9646-2 [3] and ISO/IEC 9646-3 [4]) is used as basis for the test methodology.

The present document is applicable for use in symmetrical application between two Private Integrated Services Network eXchanges (PINXs)s and is also applicable to equipment when used in certain scenarios that provide a continuous bit stream channel between two PINXs and will be referenced from the standards which specifies the scenarios concerned.

ATS specifications for the Network Layer (NL) are provided in other parts of the Private Integrated Services Network (PISN), Inter-exchange signalling protocol standards.

Annex A provides the Partial PIXIT proforma of this ETS.

Annex B provides the Protocol Conformance Test Report (PCTR) proforma of this ETS.

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