PRETS 300 358 : SEP 95
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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) - COMPLETION OF CALLS TO BUSY SUBSCRIBERS (CCBS) SUPPLEMENTARY SERVICE FUNCTIONAL CAPABILITIES AND INFORMATION FLOWS
09-01-1995
01-12-2013
Defines the stage two of the Completion of Calls to Busy Subscriber (CCBS) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators. Does not specify the additional requirements where the service is provided to the user via a telecommunications network that is not an ISDN.
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