Path: utzoo!attcan!uunet!snorkelwacker.mit.edu!bu.edu!att!att!mcdchg!tellab5!vpnet!cgordon
From: cgordon@vpnet.chi.il.us (gordon hlavenka)
Newsgroups: sci.electronics
Subject: Re: Telephone Caller ID
Message-ID: <1991Jan13.215049.10322@vpnet.chi.il.us>
Date: 13 Jan 91 21:50:49 GMT
References: <4417@mindlink.UUCP>
Organization: Vpnet Public Access
Lines: 17

In article <4417@mindlink.UUCP> a143@mindlink.UUCP (Ed Meyer) writes:
>Probably already discussed in some depth, but does anyone _know_ how the
>telephone utilities' Caller ID really works.

There is a burst of BELL 202 (an ancient standard) modem data between the
first and second rings.  I'm not sure of the exact format.  Probably comp.
dcom.telecom would be helpful..

Side note:  I recall a product being marketed on the east coast that would
automatically pull up a customer's record from dBase when they called.
This used software and hardware to interface the caller ID to dBase.  A
neat idea, I think.

-- 
-----------------------------------------------------
Gordon S. Hlavenka            cgordon@vpnet.chi.il.us
Disclaimer:                Yeah, I said it.  So what?