What does VFSS stand for?
VFSS stands for "Voice Frequency Signaling System"
How to abbreviate "Voice Frequency Signaling System"?
"Voice Frequency Signaling System" can be abbreviated as VFSS
What is the meaning of VFSS abbreviation?
The meaning of VFSS abbreviation is "Voice Frequency Signaling System"
What does VFSS mean?
VFSS as abbreviation means "Voice Frequency Signaling System"
