Protection scheme in NSFCNET

Protection and restoration issues in optical networks especially DWDM networks are attracting significant attention for future high-capacity transport applications. In this paper a flexible protection scheme of BWLSR/2 (Two-fiber Bi-directional Wavelength Line Switched Ring)/1/ is demonstrated, this protection system can function automatically without the interference of the network management system. In the case of fiber broken or single channel transport problem it can protect the optical signal. It is implemented successfully in the NSFCNET.