duplex operation: Operating method in which transmission is possible simultaneously, in both directions of a telecommunication channel. [NTIA] [RR] (188) Note 1: This definition is not limited to radio transmission. Note 2: In general, duplex operation and semi-duplex operation require two frequencies in radiocommunication; simplex operation may use either one or two. Synonyms full-duplex operation, two-way simultaneous operation.
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