![]() ![]() That means, these just go as normal sound waves ( maybe a great mimic could copy and simulate these □ ) on a telephone call. These tones most often go as in-band signals. ![]() In simpler words, these are the beeps or touch-tones that we hear while pressing digits on the keypad of the phone during a connected call on your cell or when we dial using one of the traditional touch-tone phones. Dual Tone Multi-Frequency or DTMF enables phone users to enter their details via telephone keypad.
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