62 lines
2.8 KiB
Plaintext
62 lines
2.8 KiB
Plaintext
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Title: Bugging, detecting bugs
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[ Detecting Bugs on Home Phones ]
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[ By: Dr. Jimmy and Mr. Jim ]
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FIRST OF ALL TO TEST FOR BUGS, YOU NEED A VOM (MULTIMETER) THE HIGHER
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THE IMPEDANCE THE BETTER (A DIGITAL WITH FET CIRCUITRY OR A VACUUM TUBE
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VOLT METER IS THE BEST).
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FIRST DISCONNECT THE PHONE LINE(S) AT BOTH ENDS. UNDO THE PHONE INSTRUMENT
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AND HOOK IT UP TO THE ENTRY POINT OF THE PHONE LINE FROM THE OUTSIDE WORLD
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(MA BELL DOES NOT LIKE YOU CUT HER OFF COMPLETELY.) THE SCHEME IS THE PHYSI-
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CALLY ISOLATE YOUR HOUSE, APARTMENT, FROM THE OUTSIDE WORLD. BUT BEFORE YOU
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DO THIS MEASURE THE LINE VOLTAGE (IT SHOULD BE APPROXIMATELY 48 VOLTS).
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NOW WITH THE WIRES DISCONNECTED AT BOTH ENDS SET YOUR RESISTANCE SCALE TO A
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HIGH READING AND MEASURE THE RESISTANCE OF THE PHONE LINE, IT SHOULD BE VERY
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HIGH ON THE ORDER OF MILLION OHMS OR MORE, THIS IS THE NORMAL CONDITION,
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SINCE YOU ARE MEASURING THE RESISTANCE OF AN OPEN CIRCUIT. IF IT IS MUCH LESS,
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SAY 50-100KOHMS THEN YOU HAVE A DEVICE ON THE LINE THAT DOES NOT BELONG THERE,
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PROBABLY A PARALLEL BUG.
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NOW TWIST THE END OF THE DISCONNECTED WIRE AND GO TO THE OTHER END AND
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MEASURE THE RESISTANCE OF THIS. THIS RESISTANCE SHOULD BE ABOUT ONE OHM OR
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TWO AT THE MOST IN A BIG HOUSE WITH A LOT OF PHONES. IF IT IS MORE, THEN
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YOU PROBABLY HAVE A SERIES BUG.
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IF IN THE FIRST CASE, TAKING PARALLEL MEASUREMENTS USING A METER (NOT LED/
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LCD) 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
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RELAY. A DROP-OUT RELAY IS A RELAY THAT SENSES A PHONE GOING OFF HOOK, AND
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SIGNALS A TAPE RECORDER TO START RECORDING.
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ANOTHER TEST TO DO WITH THE PHONES STIL HOOKED UP TO THE OUTSIDE WORLD, ON HOOK
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VOLTAGE IS ABOUT 48 VOLTS AND OFF HOOK IS ABOUT 6-10 VOLTS. ANY OTHER CON-
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DITIONS MAY MEAN TELEPHONE SURVEILLANCE
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IF YOU USE A WIDE RANGE AUDIO FREQUENCY GENERATOR AND CALL YOU HOUSE, APARTMENT
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ETC. FROM ANOTHER PHONE AND SWEEP UP AN DOWN TE SPECTRUM, AND YOU NOTICE THE
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PHONE ANSWERS ITSELF SOMEWHERE IN THE SWEEP YOU PROBABLY HAVE AN INFINITY
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TRANSMITTER ON YOUR LINE.
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THE ABOVE INFORMATION TELLS NOTHING BUT TELCO TAPS AT THE CENTRAL OFFICE,
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OR ANYWHERE ELSE ALONG THE LINE, BUT THIS INFORMATION MAY TELL YOU THAT YOUR
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WIFE, GIRLFRIEND(BOYFRIEND), OR BUSINES ASSOCIATE MAY BE MONITORING YOUR PHONE
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ACTIVITIES.
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AN INFINITY TRANSMITTER,IS A NEAT DEVICE IT ALLOWS YOU TO CALL THE BUGGED PLACE
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AND IT SHUTS OFF THE RINGER AND DEFEATS THE SWITCHHOOK, SO THE MOUTHPIECE NOW
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BECOMES A ROOM BUG. IT WAS ORGINALLY SOLD FROM THE TRAVELLING BUSINESS MAN
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TO MAKE SURE HIS WIFE WAS SAFE AT HOME NOT BEING ATTAKCED...
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[ DETECTING PHONE BUGS - DR. JIMMY & MR. JIM ]
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Downloaded From P-80 International Information Systems 304-744-2253
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