QRP08-4: Failures Detection in Voice Communication Systems

This paper deals with a set of algorithms to detect the occurrence of failures in voice communication systems. It´s a new approach based on the analysis of data stored in call detail records (CDR), which are tickets that contain data describing information related to the system elements involved, such as time and duration of the call, phone types and numbers, SS7 signaling, etc. The tickets are generated in PSTN switches or over VoIP gateways, for the case of Internet protocol detail record (IPDRs). Their main function is to furnish information for the billing system of telephone companies. Because of this characteristic one can consider the CDR highly reliable, otherwise the phone companies would risk performing serious mistakes in the billing of costumers. These characteristics can be used to detect faults focusing in different aspects related to the call, such as technical, economic, or social. Our main goal is to analyze and classify these algorithms according to their performance and use.