DETECTOR FOR TELEPHONE SURREPTITIOUS LISTENING TECHNIQUES
Abstract
An apparatus is described for attaching to a telephone to detect any attempt to wire-tap using the telephone microphone as a source of voice modulation. The approach taken is to continuously monitor the voltage across the microphone only when the telephone disconnect switch is actuated. If a voltage is detected, a device is operated to give a warning.
- Inventors:
- Issue Date:
- Research Org.:
- Originating Research Org. not identified
- OSTI Identifier:
- 4242291
- Patent Number(s):
- 2875285
- Assignee:
- U.S. Atomic Energy Commission
- Patent Classifications (CPCs):
-
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04M - TELEPHONIC COMMUNICATION
- NSA Number:
- NSA-13-014956
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
- Subject:
- GENERAL; COMMUNICATIONS; DETECTION; ELECTRIC POTENTIAL; ELECTRONIC EQUIPMENT; MODULATION; OPERATION; SOUND; SWITCHES; TRANSDUCERS; WIRES
Citation Formats
Hightower, E D. DETECTOR FOR TELEPHONE SURREPTITIOUS LISTENING TECHNIQUES. United States: N. p., 1959.
Web.
Hightower, E D. DETECTOR FOR TELEPHONE SURREPTITIOUS LISTENING TECHNIQUES. United States.
Hightower, E D. Tue .
"DETECTOR FOR TELEPHONE SURREPTITIOUS LISTENING TECHNIQUES". United States.
@article{osti_4242291,
title = {DETECTOR FOR TELEPHONE SURREPTITIOUS LISTENING TECHNIQUES},
author = {Hightower, E D},
abstractNote = {An apparatus is described for attaching to a telephone to detect any attempt to wire-tap using the telephone microphone as a source of voice modulation. The approach taken is to continuously monitor the voltage across the microphone only when the telephone disconnect switch is actuated. If a voltage is detected, a device is operated to give a warning.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 24 00:00:00 EST 1959},
month = {Tue Feb 24 00:00:00 EST 1959}
}
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