PRETS 300 203 : NOV 91
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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INTEGRATED SERVICES DIGITAL NETWORK (ISDN); CALL FORWARDING BUSY (CFB) SUPPLEMENTARY SERVICE FUNCTIONAL CAPABILITIES AND INFORMATION FLOWS
01-12-1994
12-01-2013
Defines the stage two of the Call Forwarding Busy (CFB) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators. Does not formally describe the relationship between this supplementary service and the basic call, but where possible this information is included for guidance.
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