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Simple Definitions

The most important electronics terms, demystified in one place.


Our Take

It is the type of communication where data can travel in both directions at the same time. It's similar to a phone call where you can talk and listen at the same time without waiting for the other person to finish.


A full-duplex (FDX) system allows communication in both directions, and, unlike half-duplex, allows this to happen simultaneously. Land-line telephone networks are full-duplex since they allow both callers to speak and be heard at the same time. Full-duplex operation is achieved on a two-wire circuit through the use of a hybrid coil in a telephone hybrid. Modern cell phones are also full-duplex.

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