Fiber optic cables are divided into indoor and outdoor fiber optic cables according to different natural environments. The center of the fiber optic cable is the fiber, and the center of the fiber is usually made of a glass core. The core is surrounded by a layer of glass cladding with a lower refractive index than the core, so that the light signal entering the core is reflected by the cladding interface, allowing the light signal to propagate forward in the core. Since the fiber itself is very fragile and cannot be directly applied to the wiring system, it is usually bundled, with a protective outer shell added outside, and a tensile wire in the middle. This is the so-called fiber optic cable, which usually contains one or more fibers.

Features of Indoor Fiber Optic Cable: The tensile strength of indoor fiber optic cable is smaller, and the protective layer is worse, but it is relatively lighter and more economical. Indoor fiber optic cables are mainly suitable for horizontal wiring subsystems and vertical backbone subsystems. The tensile strength of outdoor fiber optic cables is larger, the protective layer is thicker and heavier, and it is usually armored. Outdoor fiber optic cables are mostly used for building group subsystems and can be used for outdoor direct burial, pipeline, overhead, underwater laying, etc.

Features of Outdoor Fiber Optic Cable: It is mainly composed of optical fibers (glass threads as thin as hair)  plastic protective sleeves and plastic skins. There are no metals such as gold, silver, copper, and aluminum in the fiber optic cable, and it generally has no recycling value. The tensile strength of outdoor fiber optic cables is larger, the protective layer is thicker and heavier, and it is usually armored (i.e., wrapped in metal skin). Outdoor fiber optic cables are mainly suitable for interconnection between buildings and remote networks.

Outdoor fiber optic cable is a communication line for realizing optical signal transmission. It consists of a certain number of fibers forming a cable core in a certain way, with a sheath on the outside, and some also have an outer protective layer.

Indoor fiber optic cable is a communication line for realizing optical signal transmission. It consists of a certain number of fibers forming a cable core in a certain way, with a sheath on the outside, and some also have an outer protective layer.