An optical transport switching system having an all-optical switch that can be selectively configured to provide cross-connection and add/drop multiplexing functions. Optical circuit cards are provided in a chassis/bay, and connected by an optical backplane. The circuit cards may include access line...http://www.google.de/patents/US6973229?utm_source=gb-gplus-sharePatent US6973229 - Node architecture for modularized and reconfigurable optical networks, and methods and apparatus therefor
