Path: utzoo!attcan!uunet!pyrdc!netsys!vector!nobody
From: berger@clio.las.uiuc.edu
Newsgroups: comp.dcom.telecom
Subject: Re: In-use light
Message-ID: <telecom-v08i0171m02@vector.UUCP>
Date: 1 Nov 88 22:26:00 GMT
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X-TELECOM-Digest: volume 8, issue 171, message 2

That's really pretty excessive.  The polarity of the phone line changes
when any phone is off-hook.  It's not too hard to build a circuit that
takes that into account.  I've built them before - but they require
external power.  I'll try to remember to bring in a schematic.  It
should cost under $ 5 in parts.

			Mike Berger
			Science, Technology, and Society
			University of Illinois

			berger@clio.las.uiuc.edu
			{convex | pur-ee}!uiucuxc!clio!berger