tone dialing

tone dialing

noun
a system of calling telephone numbers wherein tones of differing pitch corresponding to the digits in the number called are electronically generated by manipulating pushbuttons (contrasted with pulse dialing ).

tone-dialing, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Dictionary.com's 21st Century Lexicon
Main Entry:  tone dialing
Part of Speech:  n
Definition:  a mode of telephone dialing in which each digit has a different sound; also called touch-tone dialing
Dictionary.com's 21st Century Lexicon
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