| 摘要 |
Disclosed is an improved three-way call detection system and method for use with a telephone management system. Specifically, three-way call detection circuit monitors the active communications of the telephone management system for pulses of energy indicative of a three-way call. A Fast Fourier Transform (FFT) is computed for all pulses of energy with time domain characteristics consistent with a click, and the phases of the components that comprise the pulse are analyzed. If the phases are generally linear (i.e., if the phases have a common group delay or phase delay), then the pulse is a three-way call click and appropriate action (e.g., monitoring the call, terminating the call, warning the caller, etc.) is initiated. The three-way call detection circuit of the present invention is also compatible with other three-way call detection techniques, which may be utilized as confirmation of a three-way call event.
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