| 摘要 |
PURPOSE: An inter-ring cross-connect for survivable multi-wavelength optical communications network is provided for simplified interconnection between two or more self-healing optical network rings by the self-healing architecture of the connected rings. CONSTITUTION: Each ring(901,902) includes a respective clockwise propagating working fiber(941, 942) and a respective counter-clockwise propagating working fiber(961,962). A parallel counter-propagating protection fiber(981,982,1001,1002) is associated with each working fiber(94,942,961,962). A line switching is used to heal a break or nodal failure. A cross-connect(92) includes two add fibers(1021,1022) and two drop fibers(1041,1042) connected to respective add/drop ports so as to enable the cross-connect(92) to independently add and drop from the two rings(901,902).
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