This sixth part of EN 300 771 specifies the network Abstract Test Suite (ATS) for the TB reference point or coincident
SB and TB reference point (as defined in ITU-T Recommendation I.413 [8]) of implementations conforming to the
standards for the signalling user-network layer 3 specification for point-to-multipoint call/bearer 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 this EN 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 TB
reference point or coincident SB and TB reference point of implementations conforming to ETS 300 771-1 [1].