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duplex definition - telecom
  1. Two-way, or duplex, transmission over a single physical circuit. Duplex transmission can be either half-duplex or full duplex in nature, depending on the communications protocol. Half-duplex transmission is in both directions, but only one direction at a time. Full duplex transmission is simultaneous transmission in both directions. See also half-duplex, full-duplex, and simplex.
  2. A fiber optic system physical configuration that employs two fibers, one for transmission in each direction. Passive optical network (PON) standards, for example, include a duplex configuration option. See also PON and simplex.

Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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