Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!decwrl!fernwood!portal!cup.portal.com!dbell
From: dbell@cup.portal.com (David J Bell)
Newsgroups: sci.electronics
Subject: Re: Caller ID info wanted
Message-ID: <41177@cup.portal.com>
Date: 11 Apr 91 21:42:54 GMT
Distribution: na
Organization: The Portal System (TM)
Lines: 31

Reprinted (without permission) from the April, 1991
issue of Electronic Products, New Products announcements:

>CHIP IDENTIFIES PHONE NUMBERS

>The SC11210/211 Caller Identification Circuitis the first highly-integrated
>analog front end that supports the Caller Number Delivery feature in a general
>switched telephone network. It receives and decodes frequency shift key (FSK)
>modem signals -- sent through telephone lines between the first and second
>rings -- and allows the caller's number to be transmitted to a user's premises
>while the phone is on-hook.
>The device includes a differential-input buffer, a four-pole bandpass filter,
>a FSK demodulator, a user-selectable energy detect circuit, and a clock 
>generator.  The SC11211 version provides support for the power-down and 
>call-progress detect functions and has four energy detect levels. The 
>SC11210/211 operates from a +5-V supply and is available in 8- and 14-pin 
>packages. (About $2 each/10,000 --- available now.)

>Sierra Semiconductor Corp.
>San Jose, CA
>Michael Friedman  408-263-9300

So there!  That may even be enough information for you phone hardware hackers
to design from. I haven't called about the availability of sample quantities, 
but Sierra should be open to individual sales, or may designate a distributor..
.


(Of course, I have no affiliation with Sierra Semi., etc, etc, etc...)

Dave      dbell@cup.portal.com