full-duplex

A duplex communication system is a system composed of two connected parties or devices which can communicate with one another in both directions. (The term duplex is not used when describing communication between more than two parties or devices.)Duplex systems are employed in nearly all communications networks, either to allow for a communication "two-way street" between two connected parties or to provide a "reverse path" for the monitoring and remote adjustment of equipment in the field.
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<communications> (fdx, from telegraphy) 1. A type of duplex communications channel which carries data in both directions at once.
On purely digital connections, full-duplex communication requires two pairs of wires. On analog networks or in digital networks using carriers, it is achieved by dividing the bandwidth of the line into two frequencies, one for sending, and the other for receiving.
2. An obsolete term for remote echo.
Compare simplex, half-duplex, double-duplex.
(2001-07-21)