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From: reyy@vax5.cit.cornell.edu
Newsgroups: sci.electronics
Subject: telephone line: which rings?
Message-ID: <1991May7.211057.4572@vax5.cit.cornell.edu>
Date: 8 May 91 01:10:57 GMT
Distribution: sci
Organization: CIT, Cornell University
Lines: 17

Greetings:

I need some information.  I want to build a device
that responds to a telephone ring.  Can anyone 
tell me, or point me to some good lit., as to 
which one of those wires in the telehpone cable
corresponds to the ringer, and at what voltage
does it appear?  Anything I should know about
when i tap into that line?  (I'm quite an
amateur at this stuff, so complete explanations
are the best.  Also, responses via Email will
prpbably be best.)

Thanks,
David S. Rowell
REYY@Vax5.cit.cornell.edu (internet)
.sig available upon request