PRETS 300 356-18 : AUG 93
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - CCITT SIGNALLING SYSTEM NO. 7, ISDN USER PART (ISUP) VERSION 2 FOR THE INTERNATIONAL INTERFACE PART 18: COMPLETION OF CALLS TO BUSY
01-02-1995
12-01-2013
SUBSCRIBER (CCBS) Specifies the stage three of the pan-European Integrated Services Digital Network (ISDN) as provided by the European public telecommunications operators for the Completion of Calls to Busy Subscriber (CCBS) supplementary service, by means of te Signalling System No. 7 protocol for the ISDN User Part (ISUP). Does not cover charging aspects.
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