Importance

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Abstract

An integrated international telephone circuit monitoring system to restrict and substantially prevent abusive types of international telephone call reorigination, the system including a circuit monitoring card to monitor international telephone circuits from a reorigination country and thereby detect DTMF tones associated with telephone call reorigination and transmitted over the international circuit, and/or a second dial tone associated with the initiation of an international reorigination call, on a connection completed call, for subsequent blocking. Additionally, the telephone circuit monitoring card is structured to detect questionable DTMF tone dialing patterns associated with telephone call reorigination for subsequent blocking of completed transmission of the DTMF tone codes. Further, the present system is structured to collect data, from a gateway switch in the user's country, relating to international calls to the reorigination country which are never answered, for determination that the telephone number being called is actually a DID access telephone number utilized to initiate a call-back for reorigination of a long-distance call, and for subsequent repeated confirmation calling of a number classified as a detected DID access telephone number, because a predetermined of unanswered calls have been placed to it, to verify that the number is a DID access number.

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First Claim