Article View: sci.electronics
Article #14886Re: Phone taps/other extensions up
From: Jerry Greenwood
Date: Sun, 13 Dec 1992 15:44
Date: Sun, 13 Dec 1992 15:44
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I had one of these devices. I can't help you on where to get one but they
are cheap and should be readily available at electronic specialty stores.
If they don't have'm ask to look in a catalog to order one special.
They are simply devices that plug into an existing telephone jack and
measure the line resistance. There is a gree and red led one the device.
The green one is lit all the time. If the line resistance drops, the red
led lights up. This will let you know if anyone picks up or turns on
anything while you are on the phone.
these devices should be REAL EASY to make. I'm sure that someone out there
in electronic land could tell us what we need to know.
Jerry
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Submitted for your approval.....
Jerry Greenwood N9NRG
grnwood@gagme.chi.il.us 312-545-2219
1st of 6
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<1992Dec13.154413.22809@gagme.chi.il.us>Path:
arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!wupost!gumby!destroyer!ncar!uchinews!machine!ddsw1!gagme!gagme!grnwoodReferences:
<1992Dec8.230105.2028@sol.cs.wmich.edu>Show Full Headers
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!wupost!gumby!destroyer!ncar!uchinews!machine!ddsw1!gagme!gagme!grnwood From: grnwood@gagme.chi.il.us (Jerry Greenwood) Subject: Re: Phone taps/other extensions up Message-ID: <1992Dec13.154413.22809@gagme.chi.il.us> Originator: grnwood@gagme Lines: 20 Sender: Jerry Greenwood Organization: Gagme Public Access UNIX, Chicago, Illinois. References: <1992Dec8.230105.2028@sol.cs.wmich.edu> Date: Sun, 13 Dec 1992 15:44:13 GMT