The application of optical multiplexing and highspeed digital switching technology set higher and higher requests for the reliability of light network Therefore, it is of vital significance to perform real-time monitor on the correspondence optical fiber and to switch to the standby channel instantly in case of any breakdown. Based on ARM7, correspondence optical fiber automatic monitoring system uses ARMcore 32-bit low-power microprocessor LPC2214 as its systems control core, and employs Embedded Operating system μC/OS-Ⅱ. Correspondence optical fiber automatic monitoring system realizes the primary and spare fiber channel examination, switches to the standby channel in case of any breakdown, and therefore guarantees open access for ray path correspondence. Meanwhile, it sends out the acoustooptic warning for the engine room administrative personnel to handle the breakdown information in time. Therefore, it is featured by merits such as strong real-time, good dynamic property and stable reliability.
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