How to distinguish the advantages and disadvantages of fiber optic cable? What types of fiber optic cable it? Cable manufacturer which is it? Regular cable manufacturers generally use the manufacturers of core, some low-cost low-quality fiber optic cable commonly used C-class D-class fiber and unsolicited smuggling fiber, these fibers due to the complex sources, the factory a long time, and often have damp color, and multi-mode fiber often mixed with single-mode fiber, the general lack of small factories the necessary testing equipment, not to make judgments on the quality of the fiber. The naked eye can not distinguish this fiber construction in touch often to the question is: very narrow band, the transmission distance is short; uneven thickness and not pigtail docking; fiber lack of flexibility in the time of the disk fiber curved off.
Through the skin to distinguish: Indoor fiber optic cable commonly used poly the recorded ethylene or flame-retardant poly recorded vinyl exterior surfaces shall be smooth, shiny, flexible and easy to peel. Poor quality of the cable jacket finish is not good, easy and inside the sleeve, Kevlar adhesion. Outdoor PE sheath of the cable should be high quality black vinyl into the cable skin smooth, bright, uniform thickness, no small bubbles. Skin is generally of poor quality cable manufactured using recycled materials, which can bring considerable cost savings, this fiber optic cable is not smooth epidermis, due to a lot of impurities within the raw material, the cable jacket made out of a lot of fine pits wow, long time to crack into the water.
Through the strengthening of the steel wire to distinguish: Regular manufacturer of outdoor cable wire phosphating treatment, surface gray, this wire into the cable does not increase hydrogen damage, no rust, high strength. Poor-quality fiber optic cable is generally replaced with thin wire or aluminum wire, the identification method is very easy - the appearance of white and pinch in your hand can be bent. Production and use of such wire, fiber optic hydrogen loss, a long time, two hanging cable box will rust fracture. Formal production enterprises to adopt a double-sided brush longitudinal dressing pattern of the anti-rust paint strip, low-quality fiber optic cable used in an ordinary metal, usually only one side for rust treatment.
Through loose tube to distinguish between: Loose tube fiber optic cable installed with optical fiber should be used PBT materials, such casing strength, deformation, and aging. Generally low-quality fiber optic cable with PVC do casing, the casing outside diameter thin hand pinch flat, a bit like a drink straw.
Instrument manufacturers tell you to distinguish between fiber paste: outdoor fiber optic cable within the fiber paste can prevent the oxidation of fiber due to water vapor into the damp, etc., using low-quality fiber optic fiber paste rarely seriously affect the life of the optical fiber.
Aramid to distinguish between: Indoor fiber optic cable and overhead power cables using aramid yarn strength member, aramid high cost of poor quality indoor fiber optic cable is generally the outer diameter is very thin, so you can use less several strands of aramid cost savings. This fiber optic cable is very easy to wear tube pulled off. ADSS cable is based on the span, per second wind speed to determine the use of aramid fiber optic cable, usually dare not cut corners.
Selection of fiber optic cable in addition to depending on the type of fiber count and fiber, but also the use of the environment of the cable to select the cable outer sheath. Should use armored cable, outdoor fiber optic cable directly buried. Overhead may make use of fiber optic cable with two or more ribs, black plastic outer sheath. Fiber optic cable within the building should be in the selection of attention to the fire, poison and smoke characteristics. Generally in the pipeline or forced ventilation at the choice of flame-retardant fiber optic cable. Building vertical cabling, you can choose the layer stranded fiber optic cable; horizontal cabling, the choice can branch fiber optic cable, transmission distance is less than 2km, to select multi-mode fiber optic cable more than 2km free relay, or use single-mode fiber optic cable.
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