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COMSPHERE 3800Plus Modems
Glossary-8 October 1998 3980-A2-GB30-40
An ITU-T standard for modems operating full-duplex with asynchronous or synchronous data
over dial networks (PSTN) or leased lines at 14,400, 12,000, 9600, 7200, or 4800 bps.
A modulation that adds the 19,200 bps and 16,800 bps data rates to the V.32bis data rates. It is
a proprietary modulation, not an ITU-T standard.
An ITU-T standard for devices operating half-duplex with synchronous data at 14,400
and 12,000 bps.
An ITU-T standard for modems operating full-duplex with asynchronous or synchronous data
over leased lines or dial networks at 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200,
16,800, 14,400, 12,000, 9600, 7200, 4800, 2400 bps.
An ITU-T standard for error control protocol.
An ITU-T standard for data compression.
A proprietary Synchronous Data Compression and error correction technique.
An ITU-T standard for local and remote diagnostic loopback tests.
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.
V.32bis
V.32terbo
V.33
V.34
V.42
V.42bis
V.42t
V.54
VF
XOFF
XON