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| tono de línea libre; tono para poder llamar | |||
| tono de marcado (A sound emitted by the receiver of a telephone that indicates that a number can be dialed) | |||
| señal de línea; tono de numeración | |||
| English thesaurus | |||
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| DT | |||
| dial tone: 13 phrases in 6 subjects |
| Communications | 2 |
| Electronics | 1 |
| Information technology | 6 |
| Statistics | 1 |
| Telecommunications | 2 |
| Telephony | 1 |