| |||
| 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) | |||
| Anglais glossaire | |||
| |||
| DTMF | |||
| |||
| Dual Tone Multiple-Frequency (The signaling system used in telephones with touchtone keypads, in which each digit is associated with two specific frequencies) | |||
