PREVENTION OF CALL LOOPS FOR WHOLESALE VOIP TRAFFIC TERMINATION

摘要

A method, system, and computer program product for providing call loop detection and prevention for VoIP SIP based wholesale traffic termination when multiple carriers are involved in handling the same phone call is provided. A method of detecting a call loop includes receiving an originated call, determining whether an origination number of the originated call is a valid phone number, when the origination phone number is invalid, determining a number of calls in a Provisional State with an invalid origination number and the same destination number that were started during a time interval, when the origination phone number is valid, determining a number of calls with the same origination number and the same destination number that were started, but not answered, during the time interval, and when the number of calls per time interval exceeds a threshold for the number of calls, determining that a call loop has been detected.