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-
- Bug Detection on Home phones
- (COURTESY OF DR JIMMY AND MR JIM)
-
- First of all to test for bugs, you
- need a VOM (Multimeter) the higher
- the impedance the better (a Digital
- with FET circuitry or a Vacuum Tube
- Volt Meter is the best).
-
- First disconnect the phone line(s) AT
- BOTH ENDS. Undo the phone instrument
- and hook it up to the entry point of
- the phone line from the outside world
- (Ma Bell does not like you cut her off
- completely.) The scheme is the physi-
- cally isolate your house, apartment, etc
- from the outside world. But before you
- do this measure the line voltage (It
- should be approximately 48 Volts).
-
- Now with the wires disconnected at both
- ee set your resistance scale to a
- high reading and measure the resistance
- of the phone line, it should be very
- high on the order of million ohms or
- more, this is the normal condition,
- since you are measuring the resistance
- of an open circuit. If it is much less,
- say 50-100Kohms then you a device on
- the line that does not belong there,
- probably a parallel bug.
-
- Now twist the end of the disconnected
- wire and go to the other end and
- measure the resistance of this. This
- resistance should be about one ohm or
- two at the most in a big house with a
- lot of phones. If it is more, then
- you probably have a series bug.
-
- If in the first case, taking parallel
- measurements using a meter (not LED/
- LCD) and you notice a "kick" in the
- needle, you probably have a line tap
-
- Now if you also make a measurement with
- the wire end twisted together and you
- notice the resistance reads about
- 1-2kohms, then you may have a drop-out
- relay. A drop-out relay is a relay
- that senses a phone going off hook, and
- signals a tape recorder to start record-
- ing.
-
- Another test to do with the phones still
- hooked up to the outside world, on hook
- voltage is about 48 Volts and off hook
- is about 6-10 Volts. Any other con-
- ditions may mean telephone surveillance.
-
- If you use a Wide Range Audio frequency
- generator and call you house, apartment,
- etc. from another phone and sweep up and
- down the spectrum, and you notice the
- phone answers itself somewhere in the
- sweep you probably have an infinity
- transmitter on your line.
-
- The above information tells nothing
- aut TELCO taps at the central office,
- or anywhere else along the line, but
- this informsation may tell you that your
- wife, girlfriend(boyfriend), or business
- associate may be monitoring your phone
- activities.
-
- An Infinity transmitter, is a neat device
- It allows you to call the bugged place
- and it shuts off the ringer and defeats
- the switchhook, so the mouthpiece now
- becomes a room bug. It was orginally
- sold from the travelling business man
- to make sure his wife was safe at home
- not being attacked (or fucking her
- boyfriend behind his back).
-
-
-