Several simple methods for distinguishing the advantages and disadvantages of optical cables

First, the outer skin: Indoor optical cables are generally used polyethylene or flame-retardant polyethylene vinyl, the appearance should be smooth, bright, flexible, easy to peel. Poor quality of the optical cable skin finish is not good, easy and inside the tight sleeve, aramid adhesion.

Outdoor fiber optic cable PE sheath should use high-quality black polyethylene, into the cable after the skin smooth, bright, uniform thickness, no small bubbles. Inferior fiber optic cable of the skin generally with recycled materials production, so that can save a lot of costs, such as optical fiber optic cable epidermis is not smooth, because the raw materials have a lot of impurities, made out of the optical cable skin There are many very small pits Wow, long time to crack, water.

Second, optical fiber: normal optical cable production enterprises generally adopt a class of fiber core, some low-cost inferior optical fiber cables usually use C-class, D-class fiber and unknown smuggled fiber, these fibers due to the complexity of the source, factory time longer, often has mmmm discoloration, and multimode fiber is often mixed with single-mode fiber, But the general small factory lacks the necessary examination equipment, cannot make the judgment to the optical fiber quality. Because the naked eye can not distinguish such optical fiber, the construction of the common problem is: bandwidth is very narrow, short transmission distance, uneven thickness, can not be butted with the tail fiber, fiber lack of flexibility, the time when the coil is broken.

Third, strengthen the steel wire: the normal manufacturer's outdoor cable steel wire is phosphating treatment, the surface is gray, such steel wire into the cable does not increase the hydrogen loss, not rust, high strength. Inferior fiber optic cable is generally used with fine wire or aluminum wire instead, the identification method is very easy--the appearance is white, pinch in the hand can bend freely. With such steel wire production of optical cable hydrogen loss, long time, hanging fiber box at both ends will rust break.

Four, steel-armored: Formal production enterprises using double-sided brush antirust paint of the longitudinal bandage steel belt, inferior optical fiber cable used is ordinary iron, usually only one side of the rust treatment.

Five, loose casing: Fiber optic cable in the loose casing should be used PBT materials, such a high casing strength, not deformation, anti-aging. Inferior fiber optic cable is usually made of PVC casing, so the casing is very thin outside, with a pinch on the flat, a bit like we drink drinks straw.

Six, the fiber cream: the fiber in the outdoor optical cable can prevent the optical fiber oxidation, because the water vapor enters the mmmm and so on, inferior fiber uses the fiber ointment to be few, seriously affects the fiber life.

Seven, Aramid: Also known as Kevlar, is a high-strength chemical fiber, currently in the military industry, the military helmet, bulletproof vest is this material production. At present, only DuPont and the Netherlands in the world's Aksu production, the price is about more than 300,000 tons. Indoor optical cable and electric overhead optical cable (ADSS) are used Aramid yarn as a reinforcement, because the high cost of aramid fiber, inferior indoor cable generally do very fine outside, this can be less with a few strands of aramid to save costs. Such an optical cable can easily be pulled off when it is in pipe-piercing. ADSs Cable because it is based on the distance, the wind speed per second to determine the use of aramid fiber optic cable, generally do not dare to cut corners.