|
NAME |
PRIMARY USE |
OPERATING PRINCIPLE |
|---|
1. INDUCTION
PICKOFF COIL
| TAPPING | DETECTS MAGNETIC FIELD SURROUNDING TELEPHONE INSTRUMENT OR WIRES CONTAINING AUDIO SIGNALS |
2. RADIO TAP
TRANSMITTER | TAPPING | DETECTS TELEPHONE LINE AUDIO SIGNALS AND TRANSMITS THEM TO A DISTANT RADIO RECEIVER |
3. TELEPHONE
CONFERENCE
RADIO
TRANSMITTER | TAPPING | SAME AS ITEM NO. 2. |
4. DIAL
DECODERS
AND PEN
REGISTERS | IDENTIFICATION OF DIALED NUMBER DURING LINE TAP | COUNTS DIAL PULSES OR DECODES TOUCH TONES |
5. CALL
FORWARDERS
AND
REDIALERS | AUTOMATIC CALL FORWARDING | DETECTS INCOMING CALL AND REDIALS SECOND TELEPHONE NUMBER |
| 6. SLAVE | TAPPING | AUTOMATICALLY CONNECTS EAVESDROPPER'S TELEPHONE LINE TO TARGET LINE ON COMMAND |
| 7. CHEESEBOX | PREVENTS LINE TRACING | JOINS TWO TELEPHONE INCOMING LINES WITH SEPARATE NUMBERS TO PERMIT TWO-WAY CONVERSATIONS |
8. INFINITY
TRANSMITTER
AND
HARMONICA
BUG | ROOM EAVESDROPPING | USES TELEPHONE SYSTEM TO CONNECT ROOM MICROPHONE TO LISTENING POST OR EAVESDROPPER |
9. AUDIO
BURGLAR
ALARM | ROOM EAVESDROPPING | SAME AS ITEM NO. 8 |
10. LISTEN
BACKS AND
KEEP ALIVES | ROOM EAVESDROPPING | HOLDS TELEPHONE LINES AND INSTRUMENT OPEN AFTER TARGET HANGS UP |
11. TELEPHONE
MODIFICATION
COMPONENTS | ROOM EAVESDROPPING | CONVERTS TELEPHONE INTO ACTIVE MICROPHONE WHILE UNUSED |
12. ACTUATOR
SWITCHES | TURN ON AND OFF TAPE RECORDERS | SENSES LINE VOLTAGE OR VOICE AND AUTOMATICALLY CONTROLS TAPE RECORDER |