I have been working in a project to decode modem signals: DTMF tones, Called ID and modulate signals in low rate QAM (until 14400).
I do have few knowledge in eletronics, so i decide to buy a Mikroe.com ´s development kit to help me in the basics…Although this kit doesn't have any interface with "PSTN world".
Did anybody build anything based in PIC microcontrollers to demodulate signals?
What would be better? To use another CI or connect the phone wires/line at dsPIC?
I build a circuit that isolate the phone line and record tons in the sound card. I will try to analyse that in MATLAB...would this work?
Well, thanks to your time! Any tip will be very helpfull…
Thanks to all.
Follow the circuit I am using to record tons in the PC´s sound card:
http://www.clubedoh
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Felipe Cerqueira / skylazart
skylazart [at] gmail.com
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