Integrated Services Digital Network (ISDN); Call Forwarding Busy (CFB) supplementary service; Service description
STANDARD published on 5.6.2001
Designation standards: ETSI EN 300199-V1.2.1
Publication date standards: 5.6.2001
The number of pages: 23
Approximate weight : 69 g (0.15 lbs)
Country: European technical standard
Category: Technical standards ETSI