The domestic communication engineering is constantly expanding, driving the update and enhancement of optical communication equipment. The Fiber Closure and optical cable terminal box win the latest domestic communication engineering such as China Mobile, China Telecom, China Unicom and China Tietong with high quality products and low price. Maintenance material approval! Serving the field of communication and achieving good results. There are many types of greentel fiber closure. The box body is made of imported reinforced plastic. It has high strength and corrosion resistance. The terminal box is suitable for connection in the terminal room of the structural optical cable. The structure is mature, the seal is reliable, and the construction is convenient. Today, we talk about some of his working principles around the two-in and two-out cable connectors. The two-in and two-out greentel fiber closure are used for protective connection and fiber distribution between two or more optical cables. They are one of the commonly used devices for user access points, mainly for wiring fiber optic splice closures and household line cables. Connection and installation of a box or simple optical splitter according to FTTX access needs The two-in and two-out Fiber Closure Tel body adopts high-quality engineering plastics; the second-stage cable-cable technology ensures that the fiber in the box has no additional attenuation; provides the space for the cable terminal to be placed and the remaining fiber storage space, and the installation operation is convenient; Multiple reuse and expansion functions. Number of cores: 12/24 Maximum splice tray: minimum capacity 4 cores maximum capacity 144 cores. Maximum number of splice trays: 6 Stretch tightness: 2000N axial tension, no air leakage. Stretch seal: After the product is inflated, it can withstand 2000N axial tension without air leakage. Impact Seal: After the product is inflated, it can withstand the impact energy of 16N*m (Newton*m) three times. The product has no cracks and no air leakage.