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Problem with voicecall-based device control using MT8870

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swami.gangatharan

swami.gangatharan

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Hi Friends,
i am doing voice call based device control using GSM & DTMF. i connect the speaker input line into DTMF input , my headset is response the call and DTMF tone but MT8870 not responding why????????????? (MT887 is DTMF decoder)
Thanks in Advance.
 

Have you searched the forum for MT8870? There are close to a hundred threads related to this IC
and it is a pretty common IC, so the problem that you are experiencing is highly likely to already
be addressed.
 

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