scope:

This fourth part of ETS 300 646 provides the conformance test specification for the second version of the Integrated Services Digital Network (ISDN) - Global System for Mobile communications (GSM) Public Land Mobile Network (PLMN) signalling interface defined in ETS 300 646-1 [1] in compliance with the relevant requirements and in accordance with the relevant guidance given in ISO/IEC 9646-1 [6]. This ETS contains the abstract test suite (ATS) for ISUP version 2 for the ISDN-PLMN interface, written in Tree and Tabular Combined Notation (TTCN) as specified in ISO/IEC 9646-3 [8]. It is based on ETS 300 646-3 [3] which specifies the Test Suite Structure and Test Purposes (TSS&TP).