Integrated Services Digital Network (ISDN). Signalling System No.7. ISDN User Part (ISUP) version 3 for the international interface. Part 17: Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, clause 1 (1992), modified]
NORM herausgegeben am 1.4.2002
Designation standards: STN EN 300356-17-V3.1.3
Classification mark: 870356
Catalog number: 19978
Publication date standards: 1.4.2002
Approximate weight : 300 g (0.66 lbs)
Country: Slovak technical standard
Kategorie: Technische Normen STN