What does ISUP stand for?
ISUP stands for "ISDN Service User Part"
How to abbreviate "ISDN Service User Part"?
"ISDN Service User Part" can be abbreviated as ISUP
What is the meaning of ISUP abbreviation?
The meaning of ISUP abbreviation is "ISDN Service User Part"
What does ISUP mean?
ISUP as abbreviation means "ISDN Service User Part"