What does BTLO stand for?
BTLO stands for "Busy Tone Lock-Out"
How to abbreviate "Busy Tone Lock-Out"?
"Busy Tone Lock-Out" can be abbreviated as BTLO
What is the meaning of BTLO abbreviation?
The meaning of BTLO abbreviation is "Busy Tone Lock-Out"
What does BTLO mean?
BTLO as abbreviation means "Busy Tone Lock-Out"
