How to remove the cold splice from a China Unicom fiber optic cable

To remove a cold splice from a fiber optic cable, carefully disassemble the splice, clean and prepare the fiber ends, and either re-splice or terminate them using mechanical or fusion methods.Step-by-Step Procedure1. Safety First Always wear safety goggles and cut-resistant gloves when handling fiber optic cables, as broken fibers can cause serious injury. Dispose of fiber scraps in a dedicated container to prevent accidents . 2. Access the Splice Locate the cold splice enclosure. Open it carefully to expose the mechanical splice sleeve or connector holding the fiber ends together . Avoid bending the fibers sharply, as this can cause micro-cracks. 3. Remove the Mechanical Splice Gently slide out the splice sleeve or connector. If the fibers are glued or held with gel, use a fiber cleaning pen or optical-grade cleaning fluid to remove any residue . Do not pull the fibers forcefully. 4. Clean the Fiber Ends Use lint-free wipes soaked in 99%+ isopropyl alcohol to clean the fiber ends from the coating edge to the cleave tip in a single downward motion . Inspect the ends under a microscope or the splicer's built-in camera to ensure they are free of dust, scratches, or oil streaks. 5. Prepare for Re-Splicing or TerminationMechanical Splice: Align the cleaned fiber ends in a new mechanical splice connector. Ensure precise alignment to minimize signal loss (typically ~0.3 dB), .Fusion Splice: If using a fusion splicer, cleave the fiber ends at 90°, load them into the splicer, and fuse them using the splicer's electric arc. Protect the splice with a heat-shrink sleeve . 6. Test the Connection After re-splicing, use an OTDR (Optical Time-Domain Reflectometer) or power meter to verify low-loss transmission and confirm the splice is successful . 7. Close the Splice Enclosure Once verified, carefully place the fibers back into the splice tray or enclosure, ensuring no sharp bends, and securely close the cover to protect the splice from environmental damage .TipsWork in a clean, dust-free environment to prevent contamination.Re-clean fiber ends if splicing multiple fibers over time to maintain low-loss performance.Use proper tools such as fiber strippers, cleavers, and splicing kits from reputable brands . By following these steps, you can safely remove a cold splice from a China Unicom fiber optic cable and restore a reliable optical connection.