Patent ID: 6046832
Filing Date: 2000-04-04
Classification: H04J,H04Q

Abstract:
A protection system for a mixed SONET/WDM network comprising:a plurality of nodes, each said node comprising working and protection SONET equipment;a plurality of SONET rings, each said ring comprising at least three said nodes being interconnected by working and protection optical fibers;a dedicated protection ring (DPR) being selected from said plurality of SONET rings;WDM equipment for producing WDM traffic by multiplexing and demultiplexing of single wavelength optical signals forming SONET traffic from said SONET equipment;rerouting optical switching equipment for rerouting said WDM traffic from said working optical fibers to said protection optical fibers in case of failure of said working fibers; andreconfiguration optical switching equipment for reconfiguration of selected nodes of said DPR for transmitting said WDM traffic through said protection optical fibers, said selected nodes being connected to undamaged working fiber.