TELECOM Digest OnLine - Sorted: Experts Please help

Experts Please help

sffdsff (
8 Apr 2005 18:08:22 -0700

Hi Guys,

I am trying to develop an application which will connect to the
telephone line and when I get an incoming line it shall send a voice
data on the phone line and then look for key entries from the other
side ... similar to a voice mail system. I have figured out that I
would need a DAA to interface to the phone line (of course a one that
would have a DTMF decoder so that I can get the key entries). Now my
question is how do I send the voice data out (this voice will be
pre-recorded on a flash). All the places I have looked say that I
would need PCM data interfaced to a DSP.

I do not want to complicate the matter -- I want to make it simple by
using a PIC Microcontroller.

So basically this is what I plan it would look like:

RJ11 <---> DAA <---> Serial Interface <---> PIC Micro <-->Flash

This should take care of both voice and key entries.

I have looked into tons of options but cannot figure out a "simple" way
to do this



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