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dual-tone multiple-frequency

Майкр. tono de marcado de frecuencia múltiple (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies)
 Английский тезаурус
Dual-Tone Multiple-Frequency
сокр., шотл.выр. DTMF
dual-tone multiple-frequency
Майкр. Dual Tone Multiple-Frequency (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies)