scope:

This fourth part of ETS 300 771 specifies the user Abstract Test Suite (ATS) for the T B reference point or coincident S B and T B reference point (as defined in ITU-T Recommendation I.413 [10]) of implementations conforming to the standards for the signalling user-network layer 3 specification for point-to-multipoint call/connection control of the Digital Subscriber Signalling System No. two (DSS2) protocol for the pan-European Broadband Integrated Services Digital Network (B-ISDN), ETS 300 771-1 [1]. A further part of the present document specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this ATS and partial PIXIT proforma. Other parts specify the TSS&TP and the ATS and partial PIXIT proforma for the Network side of the T B reference point or coincident S B and T B reference point of implementations conforming to ETS 300 771-1 [1].