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)

Source: The Free On-line Dictionary of Computing (27 SEP 03)
 

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]

Source: The Collaborative International Dictionary of English v.0.48
 

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

Source: WordNet (r) 2.0
 

Quadruplex \Quad"ru*plex\, a. [L., from quattuor four + plicare to fold.]

Fourfold; folded or doubled twice.

Quadruplex system (Electric Telegraph), a system by which four messages, two in each direction, may be sent simultaneously over the wire.

Source: Webster's Revised Unabridged Dictionary (1913)