The optical monitoring system using APS module

In Ethernet Ring network or fiber network, the NMS (Network Monitoring System) accurately distinguishes the fault point of the Optical Loss of Signal between fiber breaks and equipment faults. The method of using protection and restoration is another important matter which can effectively enhance the reliability of the Internet and lower the chances of disconnection. Although the protective function of the SDH/SONET ring is intact, the APS (Automatic Protection System) function of SONET cannot work well on star network. Therefore, it is necessary to extend the function of NMS from error diagnosis to protection and restoration.