Quadruplex
[kwod-roo-pleks, kwo-droo-pleks] /ˈkwɒd rʊˌplɛks, kwɒˈdru plɛks/
adjective
1.
fourfold; quadruple.
2.
noting or pertaining to a system of telegraphy by which four messages may be transmitted simultaneously over one wire or communications channel.
/ˈkwɒdrʊˌplɛks; kwɒˈdruːplɛks/
adjective
1.
consisting of four parts; fourfold
2.
denoting a type of television video tape recorder having four transversely rotating heads
adj.
1875, in reference to telegraph systems in which four messages can be wired simultaneously, from quadru- + plex. In classical Latin, quadruplex meant “fourfold, quadruple,” as a noun, “a fourfold amount.”
communications
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)
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