What does DRTT stand for?
DRTT stands for "Dial Repeating Tie Trunk"
How to abbreviate "Dial Repeating Tie Trunk"?
"Dial Repeating Tie Trunk" can be abbreviated as DRTT
What is the meaning of DRTT abbreviation?
The meaning of DRTT abbreviation is "Dial Repeating Tie Trunk"
What does DRTT mean?
DRTT as abbreviation means "Dial Repeating Tie Trunk"