A method of telephone dialing in which each digit is transmitted as a different tone. Compare with pulse dialing.
- To set it up correctly for tone dialling you have to remove the front cover on the control panel.
- If you can use tone dialling, the amount of time it takes to dial can be changed using the S11 register.
- It is possible to include both pulse and tone dialling within the same dial string.
For editors and proofreaders
Syllabification: tone dialing
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