INTERNATIONAL ORIGINATION TO DOMESTIC TERMINATION CALL BLOCKING

摘要

A method and device for preventing fraud in special service calls from an international origin point to a domestic terminating point through a long-distance telecommunications system is described. In the system and method, a Screening for International Calls database is added to the Integrated Services Network (ISN) platform. The records in the Screening for International Calls database are keyed by the country code and contain a field for blocked terminating regions. When an international call is made, the record corresponding to the international origin point is retrieved from the Screening for International Calls database. This record is checked to determine if there are terminating regions indicated in the blocked exchange field. If there are no terminating regions indicated in the blocked exchange field, call processing continues. If there are terminating regions indicated in the blocked exchange field, the terminating regions in the blocked exchange field are checked against the terminating point of the call. If the terminating point of the call is within the terminating region, the call is blocked.