Integrated Services Digital Network (ISDN) - Call Forwarding Busy (CFB) supplementary service - Service description
STANDARD published on 1.8.2001
Designation standards: ÖNORM EN 300199-V1.2.1
Publication date standards: 1.8.2001
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Austrian technische Norm
Category: Technical standards ÖNORM