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  1. CarlNorman1981

    16 bit PCM bus - Notch filter / Tone detection

    Obviously I am not looking for just DTMF as the first post clearly states, so there is nothing "random" and there is no "goose chase". While talking to the engineers at Telit they confirmed that I cannot send voice channel DTMF tones from within the AT command set so not only do I now have to...
  2. CarlNorman1981

    16 bit PCM bus - Notch filter / Tone detection

    Thanks for the replies people. I also found out that the Telit HE910 cannot send DTMF tones during a call, so now I also need to transmit DTMF tones... I have found a SLIC that has no DC/DC converter which I am getting a quote on ((should be cheap as there is no DC/DC interface), i hope the...
  3. CarlNorman1981

    16 bit PCM bus - Notch filter / Tone detection

    Hi All, First time post so go easy :) We have a HE910 telit module wtih a 16 bit PCM (DVI) audio bus that is normally connected to our SLIC interface. I need to find a "quick and cheap" way to detect 1400Hz 100ms tone 2300Hz 100mS tones on the digital PCM bus. Im not after an actual design...

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