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Tone Dialing

Published 11.11.2010 Presenter Anton Stepanov

Tone dialing
The tone or tonal dialing is a new word in telephony compared to the formerly used pulse dialing. DT MF DualTone MultiFrequency is the common name for the dialing method. The name describes the working principle: when you press the telephone button a sound or a tone combining in itself two tones – high frequency and low frequency- is transmitted to the line ...