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This article first presents a broad overview of the fault management mechanisms involved in deploying a survivable optical mesh network, employing optical crossconnects. We review various protection and restoration schemes, primary and backup route computation methods, sharability optimization, and dynamic restoration. Then we describe different parameters that can measure the quality of service provided by a WDM mesh network to upper protocol layers (e.g., IP network backbones, ATM networkdoi:10.1109/mnet.2004.1276610 fatcat:d2tfyf6xprfuxokvnhvzuauhiy