As the scale of long-distance fiber optic transmission and the local network are rapidly expanded, in order to protect communications, to improve the availability of fiber optic cables, and to compensate for the shortcoming of the relatively insufficient maintenance strength, adoption of a centralized maintenance measure is required. On the one hand it should inspect the operation conditions of fiber-optic network to detect degradation trends in time for prevention beforehand; on the other hand, when there is fiber broken, it can response fast and locate accurately, which can shorten the fault duration. Meanwhile, large amount information of construction, cutover, maintenance related with cable maintenance and management need electronic means for table recording, processing and querying. OTDR is an important tool for monitoring fiber optic cable. Traditional OTDR used as test instrument is a decentralized, passive means of manual maintenance means, which is difficult to satisfy higher cable safety requirements. Therefore, the use of multiple OTDRs to achieve a set of test, analysis, warning, locating, information management, business reporting capabilities in one centralized cable network monitoring system, is a further development and innovation for traditional OTDR usage and maintenance institution, which can greatly improve the maintenance efficiency and standards. By deploying distributed clients of the system and using typical network and database technology, the operator can easily complete the operation of the system and view a variety of test results. The system automatically manage OTDR instrument, monitor cable networks, and give the real-time analysis of alarm and optical performance degradation. All the fiber test data and results are stored in the background data for easily querying and analyzing.
