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dual-tone multiple-frequency
comp., MS numérotation en fréquences vocales (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies)
dual tone multiple frequency
avia., Canada double tonalité multifréquence
 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