quadruplex system

1 definition found

quadruplex system - Collaborative International Dictionary of English v.0.48 :

  Quadruplex \Quad"ru*plex\, a. [L., from quattuor four + plicare
     to fold.]
     Fourfold; folded or doubled twice.
     [1913 Webster]
  
     Quadruplex system (Electric Telegraph), a system by which
        four messages, two in each direction, may be sent
        simultaneously over the wire.
        [1913 Webster]