SSH EN 300 359-4 V1.3.2:2000

Integrated Services Digital Network (ISDN); Completion of Calls to Busy Subscriber (CCBS) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user

Scope

The present document specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information
for Testing (PIXIT) proforma for the User side of the T reference point or coincident S and T reference point (as
defined in ITU-T Recommendation I.411 [11]) 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, EN 300 359-1 [2].
EN 300 359-3 [4] specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this ATS and partial PIXIT
proforma specification. Other parts specify the TSS&TP and the ATS and partial PIXIT proforma for the Network side
of the T reference point or coincident S and T reference point of implementations conforming to EN 300 359-1 [2].