A 4-port fiber optic fusion splice box typically features 4 cable entry ports, supports multiple fiber splices, and provides durable protection for indoor or outdoor deployment.

Key Specifications

1. Port Configuration and Cable Capacity

• Number of Ports: 4 (commonly 2 on each side for inline closures or 4 output ports for termination boxes) ( ).
• Cable Diameter: Supports cables up to 20 mm for outdoor horizontal splice closures ( ) or smaller drop cables up to 3–8 mm for indoor termination boxes ( ).
• Adapter Compatibility: Supports SC or LC adapters, simplex or duplex, depending on the model ( ). 2. Splice Capacity
• Fusion Splice Trays: Typically accommodates 4 to 96 fibers depending on the box size and design ( ).
• Excess Fiber Management: Internal trays allow neat routing and storage of slack fiber for maintenance and future expansion ( ). 3. Material and Environmental Protection
• Housing Material: High-tensile plastic, ABS, or PC+ABS blends for durability and UV resistance ( ).
• Sealing: Heat shrink or gasket sealing for outdoor closures ensures protection against water, dust, and environmental contaminants ( ).
• Ingress Protection: Some models rated IP54 for dust and light moisture protection ( ). 4. Dimensions and Mounting
• Outdoor Horizontal Closure Example: 356 mm x 232 mm x 60.5 mm ( ).
• Indoor Termination Box Example: 210 mm x 140 mm x 40 mm ( ).
• Mounting Options: Wall-mountable, duct, aerial, or underground installation depending on the model ( ). 5. Additional Features
• Midspan Access: Some outdoor closures allow tapping specific fibers without cutting the entire cable ( ).
• FTTH Deployment: Indoor boxes support pigtail termination, SC/LC adapters, and neat cable routing for residential or light commercial use ( ).
• Splitter Support: Certain boxes can accommodate 1x4 PLC splitters for signal distribution ( ).

Summary

A 4-port fiber optic fusion splice box is designed to organize, protect, and manage fiber splices efficiently. Key parameters include 4 cable ports, splice capacity (4–96 fibers), durable housing, environmental protection, adapter compatibility, and flexible mounting options. Selection depends on whether the deployment is indoor FTTH termination or outdoor backbone/inline splicing, with corresponding differences in size, sealing, and fiber management features.