$179.99
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While it is useful (almost necessary), the telephone
is the most serious threat to your privacy in existence today. Your
phone line can be wiretapped or bugged and the telephone instrument
itself can be quickly and easily converted to a very efficient room
monitor.
Not too much can be done about down-line taps. However, using the
TT07, you can check your phone line for on-premises series and parallel
bugs and wiretaps. You can also check your telephone for the most
common types of hook switch bypasses.
A hook switch bypass is a modification to the telephone instrument
so that the carbon microphone (transmitter) or dynamic earphone
(receiver) will pick up room sounds and pass them down the phone
line to a listening post even with the phone hung up. This effectively
turns the telephone into a room monitor.
The TT07 detects series devices with a resistance of 61 ohms or
more. (Most series taps have a resistance of over 100 ohms.) It
also detects parallel devices with a resistance of 65 megohms or
less. (Most parallel taps are under 30 meg-ohms.) It can also detect
certain capacitively coupled taps. It weighs 7 oz. and is furnished
in a high impact case that measures 4.25" x 3.25" x 1.5".
The unit comes complete with all necessary plugs, cords, adapters,
battery and an informative, illustrated instruction manual.
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Please note: The TT07 is not a "magic box" that is connected
permanently to a working phone line. It is a test sets that lets
you check your on-premises wiring and telephones for eavesdropping
devices or taps. In order to do this, you must be able to disconnect
your inside wiring from the telephone line coming into your home
or business.
This is done at the interface between the telephone line and inside
wiring; usually just by unplugging a cable at the interface box
mounted on the side of the building. There is nothing difficult
about this, but, of course, you must have access to this interface
box.
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