In the Fiber Closure, the communication equipment that occupies an important position in the fiber optic cable communication is certainly not single. In addition, there are SMC fiber optic splice closures, jumperless fiber optic splice closures, and 144 core fiber optic splice closures in the fiber splice box. , 288-core fiber optic splice closure and 576-core fiber optic splice closure and so on. We also know that the fiber optic splice closure is an outdoor optical fiber access network backbone optical fiber cable and distribution optical fiber cable node to realize the outdoor optical fiber wiring equipment, so as to realize the straight through fiber, disk storage and optical fiber welding and scheduling functions. In the wiring project, the level of construction directly affects the performance of the system, and serious re-rework is required. For example, the slot is wrong, the mark on the distribution frame is reversed, and the number is wrong. The threading technology ( For example, cables passing through steel pipes, passing through transition boxes, etc. are more commonly used technologies. Now we will summarize the more mature experiences in this area. The threading technique is a relatively common technique in the wiring. In order to ensure that the cable is not scratched and thus causes a "short circuit," plastic guards must be placed on all the steel pipe ports. A feasible method is that the threading personnel should carry the “guarding mouth” at any time during construction, and can be placed at any time when necessary so as to avoid “stealing” because he does not “guard” his head. When the vertical cable passes through the transition box and goes to the next layer of the vertical steel pipe, the suspension must be tied in the transition box to prevent the weight of the cable from being fully pressed on the inner cable of the corner. This will affect the transmission characteristics of the cable. The cables in the vertical slot should be suspended once per meter. The cables laid in the trunking should be straight, untwisted, and have the same length.