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The high capacity WDM optical mesh networks that based on optical technologies, provide routing, grooming and restoration at the wavelength level as well as wavelength based services. Research has been done in relation to the methods and the problems associated with planning, protection and restoration of optical networks. There are several approaches to ensure fiber network survivability. The author gives a practical guide for network designers and developers. The authors begin with an overview on the future of optical networking. New options and insights are provided about, an existing ring-based network is evolved to a future mesh network.
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