Why is indoor fiber optic cable more expensive than outdoor fiber optic cable?

　　optical cable: The center of an optical fiber is usually a core made of glass. The core is surrounded by a glass envelope with a lower refractive index than the core, so that the optical signal incident on the core is reflected through the cladding interface, so that the optical signal propagates forward in the core. Since the optical fiber itself is very fragile and cannot be directly applied to the wiring system, it is usually tied into a bundle, with a protective shell on the outside and a tensile cable in the middle. This is the so-called optical cable. Optical cables usually contain one or more optical fibers. According to the different environments, they are divided into indoor optical cables and outdoor optical cables.

　　Reason 1: Indoor and outdoor cables are reinforced with different materials

　　Reason 2: The indoor fiber optic cable is used to strengthen aramid (Kevlar), which is now nearly 500,000 yuan a ton, and each fiber is covered with a layer of 0.9 sheath;

　　Reason 3: Outdoor optical cables are used to strengthen steel wires and strips, and optical fibers are only naked fiber coloring. Outdoor optical cables are generally single-mode fibers. Multimode fibers are generally used for indoor optical cables.

　　Reason 4: Outdoor Fiber Optic Cables generally use cheaper single-mode fiber, while indoor fiber optic cables use more expensive multimode fiber, resulting in outdoor fiber optic cables being cheaper than indoor fiber optic cables.

　　Indoor fiber optic cables are classified according to the use environment of fiber optic cables, as opposed to outdoor fiber optic cables. Indoor fiber optic cables are cables formed by optical fibers (optical transmission carriers) through a certain process. They are mainly composed of optical fibers (glass filaments as thin as hair) and plastic protective sleeves and plastic skins. There are no metals such as gold, silver, copper and aluminum in fiber optic cables, and generally have no recycling value. Indoor fiber optic cable is a communication line in which a certain number of optical fibers are formed into a cable core in a certain way, outsourced with a sheath, and some are also covered with an outer sheath to achieve optical signal transmission. Indoor fiber optic cables have low tensile strength and poor protective layer, but they are also lighter and more economical. Indoor fiber optic cables are mainly used for wiring in buildings and connections between network devices.

　　Indoor fiber optic cable features: Indoor fiber optic cable has less tensile strength and poor protective layer, but is relatively lighter and more economical. Indoor fiber optic cable is mainly suitable for horizontal wiring subsystems and vertical trunk subsystems. For example, outdoor fiber optic cable has higher tensile strength, thicker protective layer, and is usually armored (ie metal skin wrap). Outdoor fiber optic cable is mostly used in building group subsystems, which can be used for outdoor direct burial, pipeline, overhead and underwater laying.

　　Outdoor fiber optic cable is used for outdoor fiber optic cable. The opposite is indoor fiber optic cable. Outdoor fiber optic cable is a communication line that realizes optical signal transmission. It consists of a certain number of optical fibers in a certain way to form a cable core, which is outsourced with a sheath, and some are also covered with an outer sheath.

　　Outdoor fiber optic cable features: It is mainly composed of optical fibers (as thin as hair glass filaments) and plastic protective sleeves and plastic skins. There are no metals such as gold, silver, copper and aluminum in the fiber optic cable, and there is generally no recycling value. Outdoor fiber optic cables have higher tensile strength, thicker protective layers, and are usually armored (ie, wrapped in metal skins). Outdoor fiber optic cables are mainly suitable for interconnection between buildings and between remote networks.