The distribution box has built-in multiple pairs of FC or SC-type optical fiber butt interfaces, and a built-in splice tray for pre-laid fiber optic cable on-site splicing. When pre-laying optical cables in the room sub-system, install an optical fiber distribution box. During engineering installation, the main equipment manufacturer provides jumper cables of different lengths on the RRU side, and they are standard FC or SC connectors. The RRU optical jumper is inserted into the wiring box, fixed, and connected to the FC or SC socket. After the optical fiber is connected, close the cover of the distribution box. Only the reinforced fiber optic cable is exposed to the outside to prevent damage to the fine fiber, and the engineering reliability is good.

The specific functional requirements are as follows:

(1) Optical cable fixing and protection function

It shall have optical cable introduction, fixing and protection devices. The device has the following functions:

1. Lead the optical cable into and fix it in the optical fiber splice box to protect the optical cable and its core from damage;

2. The metal part of the optical cable is insulated from the frame;

(2) Optical fiber termination function

It shall have a fiber optic termination device. The device should facilitate the splicing operation, construction, installation and maintenance of the fiber core and pigtail of the optical cable. It can fix and protect the joint parts straight and without displacement, avoid the influence of external force, and ensure that the coiled optical cable core and pigtail are not damaged.

(3) Thread adjustment function

Through the optical fiber connector plug, you can quickly and conveniently schedule the core number in the optical cable and change the path sequence of the optical transmission system.

There should be a complete identification and recording device in the fiber optic splice box to easily identify the core number or transmission path sequence, and the recording device should be easy to modify and replace.

(4) Optical fiber storage function

There should be enough space in the fiber optic splice box to store the remaining fiber.