After fiber splicing at the optical distribution box splice tray the optical cable is then distributed

After fiber splicing in a splice tray, optical fibers are carefully coiled, secured, and routed to ensure protection, minimal signal loss, and organized distribution.

Placement and Protection of Spliced Fibers

Once fibers are spliced, they are placed in a splice tray inside the optical distribution box or closure. The tray protects the splices from mechanical stress, environmental factors, and accidental damage, while maintaining proper bend radius to prevent signal attenuation. For ribbon fibers, special strain-relief kits or braided tubing are used to secure the fibers without twisting or stressing them.

Coiling and Routing

Fibers are coiled along the direction of the loose tube or branching direction of the optical cable. This ensures a neat layout, reduces additional loss, and prevents fiber breakage due to extrusion or sharp bends. Coiling typically starts from the middle of the tray and proceeds to both sides, allowing heat-shrinkable sleeves to be fixed sequentially for protection.

Special devices like splitters or pigtails are handled separately to avoid interference with ordinary fibers.

Securing and Distribution

After coiling, fibers are secured using cable ties or clips within the tray to prevent movement. Pigtails may be wrapped with vinyl tape for additional protection. The organized fibers are then routed to their respective output ports or distribution points, ensuring that each fiber maintains its integrity and bend radius.

Loose tube cables are extended from the entrance of the closure to the tray, with approximately 1 meter of bare fiber on each side of the splice for proper organization.

Best Practices

Avoid twisting or pinching fibers during placement in the tray. Maintain proper bend radius to prevent signal loss. Use heat-shrinkable sleeves and buffer tubes to protect splices.

Handle special fibers (splitters, pigtails) separately to prevent damage. Follow manufacturer instructions for tray and closure assembly to ensure long-term reliability. By following these steps, the spliced fibers are protected, organized, and ready for distribution to the network endpoints, ensuring stable optical performance and ease of future maintenance.