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DTMF voice telephone DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF DTMF
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DTMF voice telephone dual tone multi frequency generation and detection, using digital OSCILLAR generation, and then filter detection.
fix1995
2017-02-26
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