Quadruplex

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  quadruplex
       adj : having four units or components; "quadruple rhythm has four
             beats per measure"; "quadruplex wire" [syn: {quadruple},
              {quadruplicate}, {fourfold}]

From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:

  quadruplex
       
           A kind of telegraphy system developed by
          Thomas A. Edison in the 1870s combining {diplex} and {duplex}
          communications to support simultaneous transmission of two
          messages in each direction.
       
          (2000-04-02)