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Benefits and disadvantages of DTMF tone coding and encoding with GSM modules http://ow.ly/14yxu
By Harald Naumann - Last updated: Wednesday, February 17, 2010 - Save & Share - Leave a Comment
Benefits and disadvantages of DTMF tone coding and encoding with GSM modules http://ow.ly/14yxu
17.02.2010 Remark of the author after sending the tweet:
In GSM modules is a DTMF coder included. The DTMF tones are controlled by AT commands. For decoding you have to use encoder chips or a DSP.
