dsPIC and PSTN .. DTMF, Caller ID and QAM modem tons | Piclist

A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.

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.clubedohardware.com.br/imageview.php?image=11886

--
Felipe Cerqueira / skylazart
skylazart [at] gmail.com

(You need to be a member of piclist -- send a blank email to piclist-subscribe@yahoogroups.com )

Sign in

Search piclist

Subscribe to piclist

piclist by Keywords

Discussion Groups

Discussion Groups | Piclist | dsPIC and PSTN .. DTMF, Caller ID and QAM modem tons

dsPIC and PSTN .. DTMF, Caller ID and QAM modem tons - Felipe Cerqueira skylazart - Dec 13 15:38:29 2007