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   Anglais
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dual-tone multiple-frequency
micr. 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)
 Anglais glossaire
dual-tone multiple-frequency
micr. 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
abrév., écoss. DTMF