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D definition - telecom
  1. In physics, the symbol for dispersion. See dispersion.
  2. Referring to an ISDN data (D) channel, also known as a delta (D) channel (from the phonetic alphabet), which is a channel designated for out-of-band signaling and control functions. See also D channel.

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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