MT8880 and line connection. - Electronic Circuits Projects Diagrams Free

homith · 27th July 2004, 03:14 AM

Hi everybody! i'm working about MT8880 and I get some problems :
-How to connect DTMF to telephone line?
-When i send DTMF to telephone line, I used oamp LM324 and transformer. But i see the signal drops dracticly.
I don't know how to resolve this problem.
Pls help me to be deal with this problem.
Thank you very much.
Note : contact me to address : bill_homith@yahoo.co.uk

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27th July 2004, 03:14 AM	(permalink)
homith	MT8880 and line connection. Hi everybody! i'm working about MT8880 and I get some problems : -How to connect DTMF to telephone line? -When i send DTMF to telephone line, I used oamp LM324 and transformer. But i see the signal drops dracticly. I don't know how to resolve this problem. Pls help me to be deal with this problem. Thank you very much. Note : contact me to address : bill_homith@yahoo.co.uk