Indoor optical cable is a fiber optic cable laid inside buildings, mainly used for communication equipment, computers, switches, and end-user devices in buildings to transmit information.
Due to the limitations of building environment and laying conditions, the structural design of indoor optical cables tends to become more complex. The materials used for optical fibers and cables are diverse, and the mechanical and optical properties of optical cables have different emphases.
a. Divided by usage environment and location
It can be divided into three types: indoor backbone optical cable, indoor distribution optical cable, and indoor relay optical cable.
Indoor backbone optical cables mainly provide channels between the interior and exterior of buildings; Indoor distribution cables and indoor relay cables are used to transmit information to specific locations separately.
b. Divided by the number of fiber cores
It can be divided into three types: single core, dual core, and multi-core.
Indoor optical cables usually contain 1-36 cores, but there are also large core cables with more than 36 cores, and even ultra large core high-density cables.
There are single-mode fiber, multi-mode fiber, dispersion shifted fiber, and polarizing fiber in the cable, and plastic fiber may also be used.
c. According to the shape of the optical fiber, there are skewed (B), circular (E), and other shapes of indoor optical cables (depending on the radiation environment requirements)
d. According to the position of the optical fiber in the cable or the mechanism of the optical cable, there are central bundle tube type, twisted type, skeleton type, and stacked tape type indoor cable to overcome difficulties.
e. According to the sheath material, there are flame-retardant and non flame retardant indoor optical cables.
Indoor optical cables have low tensile strength and poor protective layer, but they are also lighter and more economical. Indoor optical cables are mainly suitable for wiring inside buildings and connecting network equipment. No metal.
Indoor optical cables are generally not long in distance and can be multimode. For the same multimode bandwidth, gigabit and ten gigabit optical cables can be used respectively. Generally, non-metallic reinforced cores are used, and aramid fibers are used. Communication units will consider bending resistant G657 type optical fibers, representative of which include butterfly shaped optical cables (also known as fiber optic cables). Indoor optical cables, as the name suggests, are generally suitable for indoor use. They are generally divided into two types: indoor tight fitting and branching. Because they are used indoors, they do not require waterproof structures, so they have good flexibility and high bending performance. Fast transmission speed, clear and stable signal, good interference resistance, and large transmission traffic.
