Rich...

Sounds like a good idea.  I really want to add the ability to call each
extension phone using seperate voice paths.  Your idea would work if I
utilized a few extra relays.  I could just monitor the line and switch as
necessary, either by listening for DTMF or FLASH.  Come to think of it, I
would listen for DTMF so that FLASH could remain it's usual function.

I've already invested in the Mitel hybrids and don't want to waste them.
This really isn't a commercial venture yet.  It is something for me to work
on between projects.  I can handle everything I need to, just not passing
the CNID data to capable sets.  I wouldn't even care but the wife (already
distraught over the fact that I am concocting another device, hehehe) loves
her CallerID so I need to plan it into my circuit.

My alternative to date is to run 4 wire to each jack.  Bypass any CNID
processing, switch the current ringing line to the spare pair and just use
dedicated boxes.  But then that wastes the phones I have already.

Oh well, the standard is plain enough, just need to generate the carrier and
properly formated data packet and modulate.  Seems simple but I'm a digital
guy and analog is not my strong suit.

John


-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Rich Leggitt
Sent: Thursday, February 03, 2000 9:14 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: More about PIC and CallerID


John, I've done plenty of telephony, CID, blah blah blah ......