Usage and Maintenance of Outdoor Fiber Optic Cables

Among the transmission media utilized in computer networks, fiber optic cables possess the strongest resistance to interference. Fiber optics demonstrate superior interference immunity compared to twisted-pair cabling and coaxial cables. An outdoor fiber optic cable serves as a communication line designed to facilitate the transmission of optical signals. It consists of a specific number of optical fibers arranged in a particular configuration to form a cable core, which is then encased in a protective sheath-with some variants featuring an additional outer protective layer.

"Interference" refers to any internal or external factor that exerts an adverse effect on the normal operation of a system. Broadly speaking, interference factors within a mechatronic system encompass electromagnetic interference, temperature fluctuations, humidity variations, acoustic interference, and mechanical vibrations, among others. Of these various forms of interference, electromagnetic interference is the most prevalent and exerts the most significant impact on control systems; conversely, other interference factors can often be resolved with relative ease through the application of specific physical methods.

Precautions for Use:

When manually lifting or laying the cable, care must be taken to ensure that the fiber optic cable does not bend beyond its specified minimum curvature radius, nor should it be dragged along the ground or subjected to excessive tension. The cable must be laid flat along the bottom of the trench, avoiding any suspended sections or upward arching. When laying fiber optic cables on slopes with a gradient exceeding 20° and a slope length greater than 30 meters, it is advisable to employ an "S-shaped" laying pattern or to implement specific mitigation measures as stipulated in the design specifications.

During or immediately following the cable laying process, the outer jacket of the fiber optic cable must be inspected promptly; any damage discovered must be repaired immediately. Following the installation of direct-buried fiber optic cables, the insulation resistance between the cable's protective sheath and the ground must be verified. Backfilling of the trench-returning the excavated soil to cover the cable-may commence only after the optical fibers and any copper conductors within the cable have been thoroughly inspected and confirmed to meet the prescribed quality acceptance standards.