touch-tone also touch·tone (t ch t n )adj. Of, relating to, or being a telephone with which the user places calls by pressing pushbuttons that generate and transmit tones of differing pitch, these tones corresponding to the digits of the number being called. n. A touch-tone telephone. |
touch-tone
adj
(Electronics & Computer Science / 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
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