<protocol, compression> (G3) The CCITT fax protocol which uses data compression and allows a variety of file types (e.g. electronic mail, pictures, PostScript) to be transmitted over analogue telephone lines.
The Group 3 protocol was published by CCITT in 1993. Full details of the protocol are available from ITU-T.
See also Group 4.
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Nearby terms: gronk « gronked « group « Group 3 » Group 4 » Group Code Recording » group identifier