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COMSPHERE 3821Plus Modem
Glossary-8 February 1998 3821-A2-GB20-30
V.42bis ITU-T standard for data compression.
V.54 ITU-T standard for local and remote diagnostic loopback tests.
VF 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.
XOFF A character that tells the DTE or modem to stop transmitting data.
XON A character that tells the DTE or modem to start or resume transmitting data.