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dual-tone multiple-frequency
comp., MS	äänitaajuusvalinta (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies); DTMF (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies)
English thesaurus
dual-tone multiple-frequency
comp., MS	Dual Tone Multiple-Frequency (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies)
Dual-Tone Multiple-Frequency
abbr., scottish	DTMF