Integrated Services Digital Network (ISDN) - Signalling System No.7 (SS7) - ISDN User Part (ISUP) version 4 for the international interface - Part 17: Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, clause 1 (1992), modified]
NORMA vydaná dňa 1.11.2001
Designation standards: ÖNORM EN 300356-17-V4.1.2
Publication date standards: 1.11.2001
The number of pages: 10
Approximate weight : 30 g (0.07 lbs)
Country: Austrian technische Norm
Kategória: Technické normy ÖNORM