full-duplex
fdx
<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)