Integrated Services Digital Network (ISDN). Signalling System No.7 (SS7). ISDN User Part (ISUP) version 4 for the international interface. Part 18: Completion of Calls to Busy Subscriber (CCBS) supplementary service [ITU-T Recommendation Q.733, clause 3 (1997) modified]
NORM herausgegeben am 1.5.2002
Designation standards: STN EN 300356-18-V4.1.2
Classification mark: 870356
Catalog number: 20060
Publication date standards: 1.5.2002
Approximate weight : 300 g (0.66 lbs)
Country: Slovak technical standard
Kategorie: Technische Normen STN