AVR-Chat

This thread reminds me of a project I'd like to start (if I had the time). I 
want a simple, intelligent, 3 (up to 8) line PABX (Private Automatic Branch 
eXchange) using "normal" phones.

Maybe someone has seen a DIY PABX somewhere?

Peter

David Rea wrote:
> Hi Greg-
> 
> This document has some good information about caller ID service:
> http://www.epanorama.net/documents/telecom/cid_bellcore.html
> 
> It indicates that the signalling spec for Caller ID is simply Bell 202
> signalling. This means that you could go out and find yourself an old
> modem, rip out the Bell 202 transciever and phone line interface
> magnetics, and theoretically have a workable setup.