Fiber Optic Splice Closure | IP68 Waterproof Dome Closure for FTTH & 5G Networks

Protect Your Fiber Network Where It Matters Most

Reliable sealing. Fast installation. 25-year service life.

From aerial poles to underground ducts, our splice closures keep your fiber splices safe in the harshest environments.

A fiber optic splice closure—also known as a fiber optic splice enclosure or cable connector box—is a sealed protective housing designed to safeguard fiber optic splices in outdoor network deployments. Whether you're building a FTTH access network, expanding 5G fronthaul infrastructure, or maintaining long-haul trunk lines, the integrity of your splice points determines the reliability of your entire network.

Our splice closures are engineered to provide military-grade mechanical protection and environmental sealing for fiber splice points, ensuring zero signal loss and decades of maintenance-free operation.

Available in both dome (cap) and horizontal (flat) configurations to suit every deployment scenario.

🔒 IP68-Rated Waterproof & Dustproof Sealing

Rated IP68 per IEC 60529, our closures withstand permanent immersion in water up to 5 meters depth. The sealing system maintains internal pressure of 70kPa for 72 hours without drop, and passes 168-hour high-temperature (60°C) testing. Whether in flooded manholes, rain-soaked aerial cables, or direct-buried trenches, your splices stay dry.

🛠️ Tool-less Port Entry & Re-enterable Design

Individual cable sealing ports with tool-less release mechanism enable fast, intuitive installation. The re-enterable design allows technicians to access splices for maintenance or upgrades without replacing seals—saving time and reducing consumable costs.

📦 High-Density Splice Capacity

Supports 12 to 288+ fiber splices with modular splice trays. Choose from ribbon fiber trays (4-core, 6-core, 12-core ribbons) or loose tube configurations. Maximum configurations support up to 432 fibers (24-core single-fiber trays) or 2,592 fibers (144-core ribbon trays).

🌡️ Extreme Temperature Performance

Wide operating temperature range from -40°C to +65°C ensures reliable performance in any climate—from freezing arctic conditions to scorching desert heat.

🏗️ Versatile Installation Options

One closure, multiple deployments:

Aerial — pole-mounted or suspension clamp

Underground — manhole, duct, or chamber

Direct Buried — with enhanced mechanical strength

Wall-mounted — building facade or indoor applications

Our closures withstand 2000N/100mm pressure resistance, ensuring structural integrity under heavy loads.

🔄 Multiple Cable Entry Configurations

Available with 1 oval port + 2/4/6/8 round branch ports. Supports straight-through splicing, branch splicing, and mid-span access—adaptable to any network topology.

Parameter Specification

Product Type Dome (Cap) / Horizontal (Flat) Splice Closure

Fiber Capacity 12 – 288+ cores (customizable up to 2,592 cores)

Splice Trays Modular, stackable, hinged for easy access

Cable Ports 1 oval + 2/4/6/8 round ports (customizable)

Sealing Type Heat shrink / Mechanical seal (optional)

Protection Rating IP68 (IEC 60529)

Operating Temperature -40°C to +65°C

Design Life 25 years

Material High-grade ABS / PP / PC engineering plastic

Pressure Resistance 2000N / 100mm

Applications FTTH, FTTx, 5G fronthaul, CATV, trunk networks, emergency restoration

🏙️ FTTH / FTTx Access Networks

As the splicing node between feeder cables and drop cables in residential and commercial fiber-to-the-home deployments. Our compact dome closures are ideal for pole-mounted or wall-mounted distribution points.

📡 5G Fronthaul Infrastructure

Protecting fiber splices in the dense, high-speed backhaul networks that connect 5G base stations to core networks.

🏗️ Long-Haul & Metropolitan Trunk Networks

High-capacity horizontal closures with 432+ fiber capacity for backbone cable splicing in manholes and underground chambers.

🔧 Emergency Restoration

Rapid-deployment closures for temporary fiber restoration after cable breaks—re-enterable design enables quick rework when permanent repairs are completed.

🏭 Direct Factory Manufacturer

We are a Chinese manufacturer with in-house production, quality control, and R&D capabilities. No middlemen—competitive pricing with full quality assurance.

✅ Strict Quality Control

Every closure undergoes pressure testing, water immersion testing, and material durability testing before shipment. Our products meet international standards including IEC, Telcordia GR-771, and UL 94 V-0 flame retardancy.

🌍 Global Export Experience

Trusted by telecom operators, system integrators, and distributors across 60+ countries.

🎯 OEM / ODM Customization

Customize port configurations, splice tray layouts, colors, branding, and packaging to meet your specific project requirements.

📦 Reliable Supply Chain

Monthly production capacity of 100,000+ units ensures on-time delivery for projects of any scale.