Optical cable suppliers teach you how to identify the pros and cons 1. Sheath: Indoor optical cables are generally made of polyvinyl chloride or flame-retardant polyvinyl chloride. The appearance should be smooth, bright, flexible, and easy to peel off.
The outer sheath of poor-quality optical cables has poor finish and is prone to sticking to the tight sleeves and aramid fibers inside.
The PE sheath of outdoor optical cables should be made of high-quality black polyethylene. After the cable is formed, the outer sheath should be smooth, bright, uniform in thickness, and free of small bubbles.
The outer sheath of inferior optical cables is generally produced from recycled materials, which can save a lot of costs. The outer skin of such optical cables is not smooth. Because there are many impurities in the raw materials, the outer sheath of the finished optical cable has many tiny pits. Over time, it will crack and water will enter.
2. Optical fiber: Regular optical cable manufacturers generally use A-grade fiber cores from large manufacturers. Some low-priced and inferior optical cables usually use C-grade, D-grade optical fibers and smuggled optical fibers of unknown origin. It is complex, takes a long time to leave the factory, is often damp and discolored, and single-mode optical fiber is often mixed with multi-mode optical fiber. However, small factories generally lack the necessary testing equipment and cannot judge the quality of optical fiber.
Because such optical fibers cannot be distinguished by the naked eye, common problems encountered during construction are: narrow bandwidth and short transmission distance; uneven thickness and inability to be connected to pigtails; lack of flexibility of optical fibers, and the coiling of fibers. It breaks when it bends.
3. Reinforced steel wires: The steel wires of outdoor optical cables from regular manufacturers are phosphated and have a gray surface. Such steel wires will not increase hydrogen loss, will not rust, and have high strength after being cabled.
Inferior optical cables are generally replaced with thin iron wires or aluminum wires. The identification method is easy - they are white in appearance and can be bent at will when held in the hand.
Optical cables produced with such steel wires have large hydrogen losses. Over time, the two ends where the fiber optic boxes are hung will rust and break.
