N> (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. (1998-10-03)