Paradyne COMSPHERE 3920PLUS Installation And Operation Manual page 281

COMSPHERE 392xPlus Modems
VF
XOFF
XON
Glossary-10
Voice Frequency. The part of the audio frequency range used to transmit voice sound
(usually 300 Hz to 3400 Hz). This band is used by the modem for its modulated signal.
A character that tells the DTE or modem to stop transmitting data.
A character that tells the DTE or modem to start or resume transmitting data.
November 1996 3920-A2-GN31-30