Importance

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Abstract

The present subject matter is directed to an apparatus and methodology for detecting three-way call attempts during telephone conversations. Per the methodology, apparatus is configured to, in effect, 'ping' a called telephone by transmitting an audio frequency range tone over the loop established from the calling telephone to the called telephone, measuring the tone return time and using that measurement as a base measurement comparison point for additional measurements during the course of a conversation. The base measurement would be inherently determined by the particular path established for a given call, which path does not ordinarily change during the call. If the return time for a subsequent measurement deviates significantly from the base measurement, a determination is made that a three-way call attempt has been made because it would be a strong indicator that the total path of the call had changed, which would only occur if the inherent nature of the call changed (i.e., became a three-way call).

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First Claim