| Tone Dialling |
Also called DTMF (Dual-Tone Multi-Frequency), is the conversion of keystrokes on the handset into discrete tones; one tone for each number dialled. This allows the carrier`s switching centre to connect the call to the chosen number. DTMF can also be used to interact with telephone systems such as telephone banking. Tone dialling has superseded Pulse dialling because it is more efficient and user friendly.
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