Re: POTS line signal to PC MIC-in jack circuit?

adykes@xxxxxxxxx (Al Dykes) writes:

> What's the decent, cheap, way to get both talk and listen sides of a
> phone call on a POTS line into the MIC-in on a PC in a non-intrusive
> way?
>
> For extra credit, the ability to detect ring and Off-hook from
> software (somebidy elses's problem) running on the PC would be nice.
>
> Software code to listen to the DTMF tones and spit out the digits
> dialed would be great.
>
> Ideas ?

For telephone line interfacing:
http://www.epanorama.net/documents/telecom/telerecord.html
http://www.epanorama.net/documents/telecom/teleinterface.html
http://www.epanorama.net/links/telephone.html#audiointerfaces

Ring and off-hook detection:
http://www.epanorama.net/circuits/telephone_ringer.html
http://www.epanorama.net/links/telephone.html#busyind
http://www.epanorama.net/links/telephone.html#ringdetector

DTMF decoding:
http://www.epanorama.net/links/telephone.html#dtmf_cid
http://www.epanorama.net/links/telephone.html#signaling

There used to be a nice Wintone program for DTMF decoding at
http://www.bommeltje.nl/scanners/english/wintone.shtml
That site seems to be dead just now.. I don't know
places where you could find it. I don't have copy
of that software.

--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at
http://www.epanorama.net/
.