touch-tone(redirected from Dual-tone multi-frequency)
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Related to Dual-tone multi-frequency: touch-tone
(Telecommunications) of or relating to a telephone dialling system in which each of the buttons pressed generates a tone of a different pitch, which is transmitted to the exchange
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a telephone dialing system using push buttons to generate ten tones of different pitch, each tone corresponding to a digit of a telephone number.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.