40 lines
1.8 KiB
Plaintext
40 lines
1.8 KiB
Plaintext
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File: BUG DETECTION AT HOME
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Read 24 times
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Bug Detection on Home phones
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(COURTESY OF DR JIMMY AND MR JIM)
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First of all to test for bugs, you need a VOM (Multimeter) the higher the
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impedance the better (a Digital with FET circuitry or a Vacuum Tube Volt Meter
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is the best).
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First disconnect the phone line(s) AT BOTH ENDS. Undo the phone instrument and
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hook it up to the entry point of the phone line from the outside world (Ma Bell
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does not like you cut her off completely.) The scheme is the physically
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isolate your house, apartment, etc from the outside world. But before you do
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this measure the line voltage (It should be approximately 48 Volts).
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Now with the wires disconnected at both ee set your resistance scale to a high
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reading and measure the resistance of the phone line, it should be very high on
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the order of million ohms or more, this is the normal condition, since you
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are measuring the resistance of an open circuit. If it is much less, say
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50-100Kohms then you a device on the line that does not belong there, probably
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a parallel bug.
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Now twist the end of the disconnected wire and go to the other end and measure
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the resistance of this. This resistance should be about one ohm or two at the
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most in a big house with a lot of phones. If it is more, then you probably
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have a series bug.
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If in the first case, taking parallel measurements using a meter (not LED/LCD)
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and you notice a "kick" in the needle, you probably have a line tap
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Now if you also make a measurement with the wire end twisted together and you
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notice the resistance reads about 1-2kohms, then you may have a drop-out relay.
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A drop-out relay is a relay that senses a phone going off hook, and signals a
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tape recorder to start recording.
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Call The Works BBS - 1600+ Textfiles! - [914]/238-8195 - 300/1200 - Always Open
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