System and method for detecting unauthorized call activity

Details System and method for detecting unauthorized call activity System and method for detecting unauthorized call activity

2006-07-18

2006-07-18

Hong, Harry S. (Department: 2642)

Telephonic communications

Call or terminal access alarm or control

Fraud or improper use mitigating or indication

C379S196000, C379S199000, C379S207010, C379S377000

Reexamination Certificate

active

07079637

ABSTRACT:
Disclosed are systems and methods which detect unauthorized, impermissible, or otherwise undesired call activity through a silence detection technique employing multiple samples. One embodiment monitors a call in progress to detect an event such as might be indicative of unauthorized call activity. Thereafter, a sampling process may be invoked which analyzes multiple samples of the call to make a determination as to whether or not a particular unauthorized call activity is being attempted. A party to the call may be muted to thereby prevent that party from thwarting the unauthorized call activity determination. Embodiments implement techniques for defeating parties to calls learning the unauthorized call activity detection system in order to avoid detection, such as by implementing a plurality of detection techniques.

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U.S. Appl. No. 10/252,956, George McNitt et al., entitled “Three-Way Telephone Call Prevention System and Method,” filed Sep. 20, 2002.

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