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  An SAIC Company The views expressed in this presentation are the presenter’s and do not necessarily represent the views and policies of Telcordia Technologies, Inc. Optical Network ManagementFault Management And Service Recovery Prepared For:ITU-T Workshop On IP/OpticalChitose, Japan, 9-11 July 2002Tobey Trygar ttrygar@telcordia.com+1 732 758-5399  Session 9 -Fault Management  –  2 Outline  Definition of Fault Management  Scope of Fault Management  Transmission Fault Event Classes  Generic Layer Networks  Optical Transport Network (OTN) Layers  OTN Supervision and Fault Management Processes  Key Aspects of Service Recovery  Session 9 -Fault Management  –  3 Fault Management  Fault Management is the process of   detecting,  isolating, and  correcting the abnormal operation of a telecommunications network and its environment.  M.3010 defines a management structure that contains five layers, namely the business management, the service management, the network management, the element management and the network element layer.  This presentation addresses the network element layer and the functions that are supported within optical network elements.  Session 9 -Fault Management  –  4 Trouble Event Taxonomy Trouble EventsNon-AlarmedDefectsAnomaliesFault EventAlarmedCriticalMajorMinorPerformance EventWarning
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