Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!ucdavis!csusac!mmsac!jim
From: jim@mmsac.UUCP (Jim Lips Earl)
Newsgroups: sci.electronics
Subject: Re: Wanted: Phone-in-use Indicator
Summary: See article in magazine
Message-ID: <2872@mmsac.UUCP>
Date: 19 Dec 89 23:09:00 GMT
References: <6375@nigel.udel.EDU>
Lines: 14


You might want to pick up the December issue (if still available) of POPULAR
ELECTRONICS/HANDS ON ELECTRONICS.  It had an article/schematic of a circuit
that contained only a couple of parts.  You have to put one on every phone
in the house, but it will do what you want.  It has no LED, but if someone
is on the line, it "locks out" all the rest of the phones in the house.
It requires no additional wires to be run to each phone.  If you can't find
the issue, I'll try and do an ascii schematic for you.

-- 
      Jim "Lips" Earl             UUCP: ucbvax!ucdavis!csusac!mmsac!jim
          KB6KCP              INTERNET: mmsac!jim@csusac.csus.edu
   =======================================================================
                  The opinions stated herein are all mine.