Digicom 3911, 3910 operation manual 22bis, 25bis, 27bis, 32bis, 42bis

COMSPHERE 3900 Series Modems

V.22bis	An ITU-T standard for modems operating full-duplex with asynchronous or synchronous data at
	1200 or 2400 bps over the dial network (PSTN).
V.25bis	An ITU-T standard dialing protocol that permits direct and stored-number dialing in
	asynchronous, bisynchronous, or HDLC modes.
V.27bis	An ITU-T communications standard for modems operating in synchronous mode at 4800 or
	2400 bps.
V.29	An ITU-T communications standard for modems operating half-duplex with synchronous data at
	7200 and 9600 bps.
V.32	An ITU-T standard for modems operating full-duplex with asynchronous or synchronous data at
	4800 or 9600 bps on switched (dial) or leased telephone lines.
V.32bis	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.
V.32terbo	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.
V.42	AnITU-T standard for error control protocol.
V.42bis	An ITU-T standard for data compression.
V.54	An 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.

Glossary-8 September 1998 3910-A2-GN32-40