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duplex |
4 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Duplex \Du"plex\, v. t. [See {Duplex}, a.] (Teleg.) To arrange, as a telegraph line so that two messages may be transmitted simultaneously; to equip with a duplex telegraphic outfit. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Duplex \Du"plex\, a. [L., fr duo two + plicare to fold. See {Two}, and {Complex}.] Double; twofold. {Duplex escapement}, a peculiar kind of watch escapement, in which the scape-wheel has two sets of teeth. See {Escapement}. {Duplex lathe}, one for turning off screwing, and surfacing, by means of two cutting tools, on opposite sides of the piece operated upon {Duplex pumping engine}, a steam pump in which two steam cylinders are placed side by side one operating the valves of the other {Duplex querela} [L., double complaint] (Eccl. Law), a complaint in the nature of an appeal from the ordinary to his immediate superior, as from a bishop to an archbishop. --Mozley & W. {Duplex telegraphy}, a system of telegraphy for sending two messages over the same wire simultaneously. {Duplex watch}, one with a duplex escapement. From WordNet r 1.6 [wn]: duplex adj 1: (used technically of a device or process) having two parts "a duplex transaction" 2: (telecommunication) allowing communication in opposite directions simultaneously; "duplex system"; "duplex telephony" n 1: a house with two units sharing a common wall [syn: {duplex house}, {semidetached house}] 2: an apartment having rooms on two floors that are connected by a staircase [syn: {duplex apartment}] From The Free On-line Dictionary of Computing (13 Mar 01) [foldoc]: duplexCommunications with one channel in each direction. If data can flow in both directions simultaneously the communications is "{full-duplex}" else it is "{half-duplex}". A {simplex} channel can only carry one message at a time, though it does not imply the channel is unidirectional. The term duplex" was first used in wireless, telegraph, and telephone communications, where duplex" circuits between communicating terminals were capable of transmission in both directions, and simplex" indicated transmission from a sender to a reciever, or broadcast to several potential receivers. Nearly all communications circuits used by computers are two-way, so the distinction between simplex and duplex is seldom made (2000-03-30)
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