What does BTST stand for?
BTST stands for "BUSY TONE START LEAD"
How to abbreviate "BUSY TONE START LEAD"?
"BUSY TONE START LEAD" can be abbreviated as BTST
What is the meaning of BTST abbreviation?
The meaning of BTST abbreviation is "BUSY TONE START LEAD"
What does BTST mean?
BTST as abbreviation means "BUSY TONE START LEAD"
