3-way call detection system and method
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United States of America Patent
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Feb 16, 2010
Grant Date -
May 31, 2007
app pub date -
Oct 12, 2006
filing date -
Nov 13, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed herein is a three-way call detection system and method for detecting the addition of a third party to a pre-existing telephonic connection between a first party and a second party. The system includes a meter for measuring the amplitude of a line voltage of a telephonic connection between two parties, a first filter to remove a frequency band from the line voltage, a white noise generator for generating a low level white noise signal in the removed frequency band, a coupler for combining the white noise signal with the filtered signal, to create an additive line voltage, a second filter that passes only a portion of the additive line voltage including at least a portion of the white noise signal, and a processor for monitoring the passed signal for a shift in amplitude level associated with the addition of a third party to the connection.
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