Abstract: Methods for determining a cause of a detected anomalous event in a telecommunications system are provided. The methods include detecting an anomalous event in the telecommunications system and retrieving relevant call detail record (CDR) data associated with the detected anomalous event for at least one identified time interval responsive to detecting the anomalous event. The relevant CDR data includes both current CDR data for the at least one identified time interval and historical CDR data for past intervals corresponding to the at least one identified time interval. The relevant CDR data including the current CDR data and the historical CDR data is preprocessed and the preprocessed relevant CDR data is processed to determine a root cause of the detected anomalous event. Processing the preprocessed relevant CDR data includes comparing the current CDR data and the historical CDR data to determine the root cause of the detected anomalous event.

Abstract: Methods for detecting anomalies in a telecommunications network are provided. The methods include calculating a call duration for each of a plurality of calls associated with a corresponding call detail record (CDR). Each CDR provides details associated with a single call in a plurality of fields. Each of the plurality of calls are categorized based on the calculated call duration for each call such that each of the plurality of calls is assigned to a duration bin, each duration bin including calls having similar calculated call durations. The CDRs are grouped using the duration bins and at least one carrier and/or a telecommunications provider. A plurality of summary statistics are calculated for each of the plurality of CDR groups. The calculated plurality of summary statistics are analyzed to determine whether an anomaly is present. Among other remedial measures, an external ticket may be generated informing affected carriers when an anomaly is present.