Sobakava
Full Member level 6
I making an autodialer for handsfree operation. I could dial the number using DTMF generated by a microcontroller. This part works fine.
I used a regular microphone from a phone handset for testing. I coupled it to the line using a 600 ohm transformer and it seems ok.
But how can I combine : microphone, handsfree speaker and dtmf signal all together to the phone line?
I used a regular microphone from a phone handset for testing. I coupled it to the line using a 600 ohm transformer and it seems ok.
But how can I combine : microphone, handsfree speaker and dtmf signal all together to the phone line?
