Abstract: Optical wavelength division multiplex systems are being installed today. Optical networks will be implemented in the near future. However, little is known about the operational aspects and requirements. In the projects PHOTON and MOON not only an optical network with more than 500 km transmission length is established but also processes are being developed that might be used for installation and operation of future networks. The presentation gives an overview about the projects, focuses on the field trials and the envisaged tests and applications. !2
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