This ITU-T Recommendation specifies Test Suite Structure and Test Purposes (TSS & TP) for the network at the TB reference point or coincident SB and TB reference point (as defined in ITU-T Recommendation I.413 [3]) of implementations conforming to the procedures for the support of point-to-multipoint switched virtual channel connections, between a root and multiple leaves of the Digital Subscriber Signalling System No. 2 (DSS2) protocol for the Broadband Integrated Services Digital Network (B-ISDN), ITU-T Recommendation Q.2971 [1]. Further parts of this ITU-T Recommendation specify the Protocol Implementation Conformance Statement (PICS) proforma and Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proformas based on this ITU-T recommendation.