At present, a fiber optic network used a lot. So the quality of fiber optic network is very important, whether it is the medium of the data such as fibre-optic, currently only uses type single mode With a fibre-optic type multiple modes, but not used, and the other one is a problem. When a fiber optic network unavailable. The cause from the device router work hard because set various functions into the router status of too much load device. Result in the router is broken or work efficiency of the system decreased.