Our company's KM-608B series is high-performance embedded industrial Ethernet Optical self-healing, full line rate 1000M redundant fiber optic ring network structure, can achieve multi-point Ethernet interface's access and transmission of fiber-optic ring network. The use of large-scale professional Optical integrated circuits, high integrated optical transceiver devices and digital phase-locked loop technology, small size, high reliability, and support 256 fiber nodes when the station failures, brown-out, broken fibers happens, it automatically Recovery and go to work. Switch time less than 50ms. The judging criteria of Self-healing based on dark, E3 error, E6 error and improve stability and security of the system. Support for multiple protocols. Specifically for automatic electric power distribution industrial automation, transportation, telecommunications and other industries, especially design for highly reliable data communications. Solve the contradiction between communication distance and high speed communications, distributed multi-node, but also to solve the electromagnetic interference, ground loop interference and lightning damage problems, saving a significant fiber resources.