VFFT Voice – Frequency Facility Terminal
voice-frequency facility terminal(VFFT)
voice-frequency facility terminal
AM voice frequency carrier telegraph systme
double Voice frequency signal
FMVFT Frequency Modulated Voice Frequency Telegraph
FSVFT Frequency Shift Voice Frequency Telegraph
VAD Voice C Activated Dialing
VCC Voice C Controlled Carrier
VDR Voice C Digitization Rate
VEV Voice C Excited Vocoder
VFA Voice Frequency Amplifier
VFB Voice Frequency Generator
VFC Voice Frequency Cable
VFC Voice Frequency Carrier