Line sharing multipoint POTS splitter masking noise
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United States of America Patent
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Aug 10, 2004
Grant Date -
N/A
app pub date -
Dec 27, 2000
filing date -
Feb 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The eavesdropping prevention system and method of the present invention provides a mask signal generator which generates a mask signal superimposed over a leakage signal. The mask signal prevents meaningful detection and amplification of the leakage signal. The amplitude of the mask signal is low enough so as not to interfere with the transmission of analog POTS signals over the communication line on which the mask signal is superimposed. In the preferred embodiment, the amplitude of the mask signal exceeds the amplitude of any anticipated leakage signals which may be manifested on the communication line. Alternative embodiments of a mask signal are described.
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