Norm
[AKTUELL]
OENORM EN 301134 V 1.1.1
OENORM EN 301134 V 1.1.1
Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Service description
Titel (englisch)
Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Service description