Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) version 2 for the international interface; Part 33: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for basic services [ITU-T Recommendation Q.784.2 (1997), clauses 2 to 5 and annexes B to C, modified]
This thirty-third part of ETS 300 356 contains the conformance test specification for ISUP version 2 basic call control and signalling procedures as specified in ETS 300 356-1 [15]. It is applicable to all types of exchanges as defined in the reference specification.
Life cycle
NOW
IN_DEVELOPMENT prSSH ETS 300 356-33:1997 ed.1 40.60
Close of voting May 11, 2026