4 Ports Mini Size 48 Cores Fiber Optic Splice Closure FOSC Optical Fiber Joint Box for FTTH Outdoor

The FTTH 4-Port Vertical Mini Size Fibra Optica Splice Enclosure Box (FOSC) is a compact, high-performance optical cable junction solution designed for reliable fiber splicing and protection. Available in 12fo, 24fo, and 48fo configurations, this dome-type closure provides a robust environment for fiber optic connections, shielding splices from heat, cold, light, oxygen, and microbial degradation while delivering excellent mechanical strength.

The solid shell and main structure of the enclosure endure the most demanding environmental conditions while providing flame-retardant and waterproof protection. It safeguards against vibration, impact, cable tension, and twisting. Manufactured from high-quality plastic, the KCO-DM22-48LX model offers fire resistance, anti-aging properties, UV resistance, and quakeproof performance while protecting splices during pulling, torsion, and impact.

This mini-size dome-type splice closure features 4 cable ports — 2 for input cable and 2 for output cable — with a maximum capacity of 48 cores. The box accommodates up to 4 splice trays, each with a 12-core capacity. Suitable for outdoor applications, it can be mounted on a pole, wall, or strand, ensuring long-term reliability under ambient temperatures from -40°C to +65°C. It is used for direct connection or splicing of optical cable fibers in aerial, underground, direct buried, wall-mounting, hand hole, and duct mounting applications.

• Fiber optic projects
• FTTX (Fiber to the x) deployments
• Local Area Networks (LAN)
• CATV systems
• Analog and Digital Passive Optical Networks (PON)

• Waterproof class: IP67
• Excellent mechanical performance
• Superior resistance to aging
• High airproof, dampproof, and lightning strike resistance
• Can be placed with aerial cable, buried in earth, or installed in pipelines

• Stretch: The sealed and inflated box body (60 kPa ± 5 kPa) can withstand 1000 N axial tension for 1 minute with no change in air pressure.
• Flattening: The sealed and inflated box body (60 kPa ± 5 kPa) can bear a horizontal uniform pressure of 2000 N / 10 cm. The pipe can withstand 600 N / 10 cm without air pressure change.
• Impact: The sealed and inflated box (60 kPa ± 5 kPa) is subjected to a 1 kg steel ball dropped from 1.6 m three times; the box does not crack and pressure remains unchanged.
• Voltage Resistance: At 1.5 m water depth, soaked for 24 hours, 15 kV DC for 1 minute without breakdown or arcing.
• High-Temperature Test: The sealed and inflated box (60 kPa ± 5 kPa) at +60°C for 2 hours shows no deformation or leakage.
• Low-Temperature Test: The sealed and inflated box (60 kPa ± 5 kPa) at -40°C for 2 hours shows no deformation or leakage.
• Temperature Cycle Test: The sealed and inflated box (60 kPa ± 5 kPa) undergoes three cycles at -40°C with 2-hour constant temperature at each point; pressure drop amplitude ≤ 5 kPa.
• Bending: The sealed and inflated box (60 kPa ± 5 kPa) with a tension load of 150 N and bending angle of ±45° for 10 cycles shows no air pressure change.
• Reverse (Torsion): The sealed and inflated box (60 kPa ± 5 kPa) with a torque of 50 N·m and torsion angle of +90° for 10 cycles shows no air pressure change.
• Sealing Performance: At gas pressure 100 kPa ± 5 kPa, water bath soak for 15 minutes shows no bubbles escaping; no change after 24-hour pressure test.
• Insulation Resistance: At 1.5 m water depth, soaked for 24 hours, insulation resistance ≥ 2 × 10⁴ MΩ.

We offer full OEM and ODM services. If you want to display your own brand logo on the goods — including cable, package bag, label, or any other location — our team is ready to assist. Please contact our sales team for the best support.

• According to standard export packing
• Carton box, wooden box, wooden pallet

• International express: UPS, TNT, DHL, etc.
• International air: CA, AA, EA, etc.
• By sea
• Standard export sea port: Shenzhen, Hongkong, Ningbo
• Standard export airport: Shenzhen, Hongkong, Hangzhou, Shanghai