What does Itb stand for?
Itb stands for "Incoming Trunk Busy"
How to abbreviate "Incoming Trunk Busy"?
"Incoming Trunk Busy" can be abbreviated as Itb
What is the meaning of Itb abbreviation?
The meaning of Itb abbreviation is "Incoming Trunk Busy"
What does Itb mean?
Itb as abbreviation means "Incoming Trunk Busy"
