scope:

This fifth part of ETS 300 359 specifies the Test Suite Structure and Test Purposes (TSS& TP) for the Network side of the T reference point or coincident S and T reference point (as defined in ITU-T Recommendation |.411 [7]) of implementations conforming to the stage three standard for the Completion of Calls to Busy Subscriber (CCBS) supplementary service for the pan-European Integrated Services Digital Network (ISDN) by means of the Digital Subscriber Signalling System No. one (DSS1) protocol, ETS 300 359-1 [1].