Nikunj Tanna
Advanced Member level 4
- Joined
- Dec 8, 2009
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Hi all,
Actually I need to decode DTMF tones from the speaker of the local telephone or GSM modem. My main requirement is that I want to detect the key pressing using this. I have tried with 8870 decoder. But i found circuits which comes directly from the telephone lines where as my ultimate application has GSM modem in lead. Like in simple language i want to detect the tones at the speaker connections of modem or a local side telephone.. If you have any idea, just share your thoughts and suggestions.
NIKS
Actually I need to decode DTMF tones from the speaker of the local telephone or GSM modem. My main requirement is that I want to detect the key pressing using this. I have tried with 8870 decoder. But i found circuits which comes directly from the telephone lines where as my ultimate application has GSM modem in lead. Like in simple language i want to detect the tones at the speaker connections of modem or a local side telephone.. If you have any idea, just share your thoughts and suggestions.
NIKS