Norm
[AKTUELL]
OENORM EN 301821 V 1.2.1
OENORM EN 301821 V 1.2.1
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Private User Mobility (PUM) - Registration supplementary service [ISO/IEC 17876 (2003), modified]
Titel (englisch)
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Private User Mobility (PUM) - Registration supplementary service [ISO/IEC 17876 (2003), modified]