The optical fiber terminal box is the terminal connector of an optical cable. One end is an optical cable and the other end is a pigtail. It is equivalent to a device that splits an optical cable into a single optical fiber. Fusion splicing of optical fiber and optical fiber, splicing of optical fiber and pigtail, and handover of optical connector. It also provides mechanical protection and environmental protection for the optical fiber and its components, and allows proper inspections to maintain the highest standards of optical fiber management.
Optical fiber terminal boxes are widely used in local telephone, rural telephone network systems, data and image transmission systems, CATV cable television series, used for direct connection and branch connection of indoor optical cables, and play the role of pigtail storage and protection of joints. It is made of cold-rolled steel plate by electrostatic spraying, with a reasonable design structure and beautiful appearance, which can fix the fiber optic cable reinforcing core at the terminal.
In actual work, the terminal box can be used as an indoor joint box, but the joint box is rarely used as a terminal box. The purpose is different.
1. The transfer box can be divided into the optical cable transfer box and the cable transfer box. Their functions are used for the front-end wiring of the user.
2. The connection box generally refers to the optical cable connection box, also called the optical cable connector box. In some places, especially the radio and television system, it is also called the optical connection package. Its function is to protect the optical cable connector from external damage. The distribution frame is also divided into the optical cable distribution frame and the cable distribution frame, and the function is also the same as the transfer box, but it is used in the operator's computer room.
The optical fiber terminal box shall have 4 basic functions as the terminal equipment of the optical cable line.
①Fixed function After the optical cable enters the rack, its outer sheath and reinforcing core shall be mechanically fixed, ground wire protection parts shall be installed, end protection treatment shall be carried out, and the optical fiber shall be grouped and protected.
② Fusion splicing function After the optical fiber drawn from the optical cable is spliced with the tail cable, the excess optical fiber is coiled and stored, and the spliced joint is protected.
③Matching function Plug the connector attached to the tail cable to the adapter, and realize the optical connection with the optical connector on the other side of the adapter. Adapters and connectors should be able to be flexibly plugged and unplugged; the optical path can be freely deployed and tested.
④Storage function Provide storage for various cross-connected optical cables between racks, so that they can be placed in a regular and orderly manner. There should be an appropriate space and method in the optical fiber terminal box to make the wiring of this part of the optical connection line clear, easy to adjust, and meet the requirements of the minimum bending radius. With the development of optical fiber networks, the existing functions of optical fiber terminal boxes can no longer meet many new requirements. Some manufacturers add some optical fiber network components such as optical splitters, wavelength division multiplexers and optical switches directly to the optical fiber terminal box.