Group 4


Group 4

(protocol, compression)(G4) The CCITT fax protocol whichuses data compression and allows a variety of file types(e-mail, pictures, PostScript, etc.) to be transmitted overdigital (ISDN) telephone lines.

The Group 4 protocol was published by CCITT in 1993. Fulldetails of the protocol are available from ITU-T.

See also Group 3.