Paradyne 9161 User Manual page 314

Glossary
VF
virtual circuit
Yellow Alarm
GL-4
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 logical link/connection or packet-switching mechanism established between two devices
at the start of transmission.
An outgoing signal transmitted when a DS1 terminal has determined that it has lost the
incoming signal.
April 1999 9161-A2-GH30-40