group 4

1 definition found

group 4 - Free On-line Dictionary of Computing (26 May 2007) :

  Group 4
  G4
  
     <protocol, compression> (G4) The CCITT fax protocol which
     uses data compression and allows a variety of file types
     (e-mail, pictures, PostScript, etc.) to be transmitted over
     digital (ISDN) telephone lines.
  
     The Group 4 protocol was published by CCITT in 1993.  Full
     details of the protocol are available from ITU-T.
  
     See also Group 3.
  
     (1998-09-10)