Telephonic communications – Call or terminal access alarm or control – Fraud or improper use mitigating or indication
Reexamination Certificate
2006-10-12
2010-02-16
Hong, Harry S (Department: 2614)
Telephonic communications
Call or terminal access alarm or control
Fraud or improper use mitigating or indication
C379S202010, C379S207010, C379S210020, C379S406140
Reexamination Certificate
active
07664243
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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Hong Harry S
Inmate Telephone, Inc.
Wiley & Rein LLP
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