What are DTMF Tones?
DTMF tones, Dual Tone Multi Frequency, are the tones you hear when you press a key on a standard telephone keypad. ChaCha!
Answered by Rachael H. -
Older Answers
DTMF stands for Dual-Tone Multi-Frequency tones and are used for touch-tone dialing. ChaCha!
Answered by Tonya C. -
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