scope:

The present document specifies the network Abstract Test Suite (ATS) for the TB reference point or coincident S_B and T_B reference point (as defined in ITU-T Recommendation I.413 [12]) of implementations conforming to the standards for the signalling user-network layer 3 specification for Negotiation during call/connection establishment phase of the Digital Subscriber Signalling System No. two (DSS2) protocol for the pan-European Broadband Integrated Services Digital Network (B-ISDN), EN 301 067-1 [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 User side of the T_B reference point or coincident S_B and T_B reference point of implementations conforming to EN 301 067-1 [1].