A telecommunications or signaling system that allows simultaneous two-way transmission of signals over a single communication channel or medium.
From Latin 'diplex' (double), derived from 'di-' (two) and 'plex' (fold), describing a doubled or dual mode of operation in communication systems.
Diplex technology revolutionized telecommunications—instead of needing two wires to talk both ways, engineers figured out how to fold both directions onto one path, like a conversation highway in both lanes.
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