Patent ID: 6601185
Filing Date: 2003-07-29
Classification: G06F,H04J,H04L,H04Q

Abstract:
A method of filtering alarms sent to a sub-network manager of a telecommunications network, the sub-network manager being arranged to manage network elements in a respective managed domain, the method comprising:determining whether the alarm is a secondary (AIS) alarm, generated in response to a signal received by a network element on an incoming link; if the alarm is not a secondary alarm, passing the alarm for further processing; if the alarm is a secondary alarm, searching for the upstream termination point of the incoming link and determining whether the upstream termination point is in the managed domain of the sub-network manager; if the upstream termination point is in the managed domain, blocking the alarm; and if the upstream termination point is not in the managed domain, passing the alarm for further processing.