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