DTMF

DTMF definition - telecom
A signaling method that employs fixed pairs of frequencies. Most analog touchtone telephone sets are equipped with DTMF keypads in a grid three keys on the vertical axis and four keys on the horizontal axis, although some special purpose sets have a 4

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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