Integrated Services Digital Network (ISDN). Signalling System No. 7. ISDN User Part (ISUP) version 2 for the international interface. Part 17: Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, section 1 (1992), modified]
NORM herausgegeben am 1.4.1996
Designation standards: ČSN ETS 300356-17
Classification mark: 877068
Catalog number: 19461
Publication date standards: 1.4.1996
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Kategorie: Technische Normen ČSN