What does ISDN stand for?
ISDN stands for "Integrated Systems Digital Network"
How to abbreviate "Integrated Systems Digital Network"?
"Integrated Systems Digital Network" can be abbreviated as ISDN
What is the meaning of ISDN abbreviation?
The meaning of ISDN abbreviation is "Integrated Systems Digital Network"
What does ISDN mean?
ISDN as abbreviation means "Integrated Systems Digital Network"
