How to fix the flexible optical fiber in the terminal box

Secure the flexible optical fiber in the terminal box using proper routing, splice trays, protective tubes, and cable ties while maintaining the minimum bend radius to prevent signal loss.

Step-by-Step Procedure

1. Prepare the Terminal Box and Tools Ensure the fiber termination box (FTB) is properly mounted and stable, either wall-mounted, rack-mounted, or desktop type, depending on your installation site. Gather necessary tools: fiber cleaver, stripper, fusion splicer, protective tubes, cable ties, and cleaning kit . 2. Route the Fiber Cable Insert the fiber through the entry gland or cable hole. Arrange the fiber along the internal guides or curvature paths provided in the box. Avoid sharp bends; maintain the minimum bend radius (typically ≥30 mm for standard fibers) to prevent micro-bending and signal attenuation . 3. Secure the Fiber Use internal clamps, cable ties, or spiral sleeves to fix the fiber in place. Ensure the fiber is immobilized but not pinched. Excess fiber can be coiled neatly in the splice tray or storage area to allow future maintenance . 4. Splice or Connect the Fiber Strip the protective coating and insert the fiber into a protective tube. Perform fusion splicing or mechanical splicing to connect the fiber to pigtails or adapters. Wrap the splice with insulating tape or protective sleeves to secure it . 5. Organize and Protect Place the spliced fibers into the splice tray or cassette. Ensure fibers are properly seated in adapters (SC, LC, FC, or ST) and that the tray lid is closed to prevent dust or moisture ingress. Label each port for easy identification during troubleshooting . 6. Test and Inspect Gently pull on the fibers to confirm they are stable. Use an optical power meter or OTDR to verify signal quality and check for any weak points or excessive loss. Adjust routing if necessary . 7. Close and Maintain Close the terminal box lid securely to maintain environmental protection. Regularly inspect and clean connectors and internal components to ensure long-term reliability .

Key Tips

• Avoid bending fibers below the minimum radius to prevent micro-bending and long-term attenuation .
• Use protective tubes and splice trays to prevent mechanical stress on the fiber .
• Ensure proper strain relief to prevent tension from feeder or drop cables from affecting the spliced fibers .
• Label all fibers and ports for easier maintenance and troubleshooting . By following these steps, the flexible optical fiber will be securely fixed in the terminal box, minimizing the risk of damage and ensuring stable optical signal transmission.