What does OPT stand for?
OPT stands for "Open Packet Telephony"
How to abbreviate "Open Packet Telephony"?
"Open Packet Telephony" can be abbreviated as OPT
What is the meaning of OPT abbreviation?
The meaning of OPT abbreviation is "Open Packet Telephony"
What does OPT mean?
OPT as abbreviation means "Open Packet Telephony"
