| 摘要 |
In a telecommunication network, there is provided a system for monitoring a plurality of telephone calls to a common private branch exchange, PBX) in order to detect fraudulent activity. In particular, fraudulent activity is detected in calls made to and originating from a PBX that uses a common billing number. If fraudulent activity is found, an alert message is provided to a fraud analyst for further review. Call detail records corresponding to each of the calls, are retrieved and stored in a queue. The billing number and a call time associated with each call detail record are analyzed. Each call detail record, billing number and call time is compared with at least one predetermined threshold relating to billing numbers and call times.
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