Norm
[AKTUELL]
OENORM EN 300199 V 1.2.1
OENORM EN 300199 V 1.2.1
Integrated Services Digital Network (ISDN) - Call Forwarding Busy (CFB) supplementary service - Service description
Titel (englisch)
Integrated Services Digital Network (ISDN) - Call Forwarding Busy (CFB) supplementary service - Service description