Zyqora Zyqora

China Top Dome Fiber Closure Manufacturer & Factory

High-Performance Splice Management, Sealed Durability, and High-Density Optical Routing Solutions

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Global Infrastructure Demand for Dome Fiber Closures

In modern telecommunications, the optical network's physical layer forms the foundation of all global data exchange. The Dome Fiber Closure (also known as the vertical fiber optic joint box or vertical splice closure) acts as the critical barrier protecting delicate glass fibers from environmental threats. In aerial, underground, and direct-buried environments, maintaining optical integrity is vital to prevent signal loss and system downtime.

Driven by the worldwide expansion of 5G networks, FTTx (Fiber to the X), and hyperscale data center interconnections (DCI), optical cables are pushing further into extreme climates. The necessity for high-density, reliable, and easily deployable dome closures has grown significantly. In regions like North America, Europe, and Southeast Asia, telecommunication operators are upgrading legacy copper networks to optical fiber. This transition requires weather-resistant splicing nodes that can support hundreds of fiber splices in a compact, durable structure.

High-capacity networks require robust protective housing. Choosing industrial-grade Dome Fiber Closures prevents signal loss from moisture entry, freeze-thaw cycles, and mechanical stress.

Securing the Physical Layer of Optical Networks

As a specialized supplier of optical connectivity, Zyqora understands that the performance of high-speed transceivers (such as SFP, SFP+, and QSFP28 modules) depends heavily on the quality of the optical path. High-speed transceivers are sensitive to attenuation variations. Even minor signal loss caused by moisture or fiber bending inside a low-quality splice enclosure can degrade data transmission rates and increase bit error rates (BER).

Our engineering team focuses on matching high-performance transceivers with optimized fiber routing and splicing environments. By optimizing the bend radius, tray structure, and environmental sealing of the splice enclosures, Zyqora ensures that the optical path remains clear. This provides stable performance from the network core to the final subscriber drop line.

Our dome closures are designed to handle dense cable structures, ribbon cables, and traditional loose-tube configurations. This flexibility makes them a key component for telecommunication operations, industrial networks, and large-scale smart city deployments globally.

Engineering Specifications & Structural Architecture

Our Dome Fiber Closures are manufactured from high-impact polypropylene (PP) modified with UV-resistant stabilizers, ensuring durability in temperature ranges from -40°C to +65°C.

Advanced Sealing Mechanisms

  • IP68 Ingress Protection: Fully dust-proof and capable of continuous immersion in water up to 5 meters.
  • Sealing Options: Mechanical sealing utilizing high-performance vulcanized rubber gaskets, or heat-shrinkable tubing configurations.
  • Re-entry Performance: Designed for easy opening and closing without specialized tools, saving maintenance time.

Optimized Splice Cassette Design

  • Bend Radius Control: Guaranteed bend radius > 30mm for all single-mode (G.652D, G.657A) and multimode fibers.
  • High Splicing Capacity: Modular trays supporting 12, 24, 48, or up to 288 splices per unit.
  • Logical Cable Routing: Clear, separated lanes for transit fibers and drop fibers prevent accidental damage during upgrades.

Environmental Durability

  • Impact Resistance: Meets IK10 mechanical impact standards, resisting rock fall and vandalism.
  • Chemical Protection: Resistant to acids, alkalis, and salt spray typically found in underground manholes and sewers.
  • Pressure Relief Valve: Integrated option for air valve testing to verify airtight seals.

About Zyqora - Connecting Networks Internationally

Founded in 2016, Zyqora Optical Technologies Co., Ltd. is a manufacturer and supplier of optical transceivers and fiber connectivity solutions for data center, telecom, enterprise network, and cloud computing applications.

10+
Years Industry Expertise
$18M+
Annual Export Revenue
65
R&D Engineers
860+
Supply Chain Partners

With a modern production facility covering 386 square meters, Zyqora specializes in the design, development, manufacturing, and testing of optical communication products, including SFP, SFP+, SFP28, QSFP28, QSFP-DD, OSFP, AOC, and DAC solutions. Our products are engineered to deliver reliable performance, scalability, and compatibility with mainstream networking platforms.

Quality is at the core of everything we do. Our manufacturing process is supported by comprehensive quality assurance procedures, including incoming material inspection, optical performance testing, aging tests, compatibility verification, and final product inspection. A dedicated team of 42 quality control professionals ensures that every product meets international standards and customer expectations.

As a company with both manufacturing and international trading capabilities, Zyqora has built a reliable supply network with more than 860 supply chain partners, enabling efficient sourcing, stable production, and flexible delivery schedules. Our primary customers include telecom operators, data center providers, system integrators, network equipment distributors, and enterprise IT solution providers worldwide. To support evolving market demands, we maintain a strong research and development team focused on innovation and product optimization. Zyqora offers comprehensive OEM and ODM services, including customized labeling, firmware coding, packaging design, and product specification development. Last year alone, the company successfully launched 168 new products to meet the growing requirements of next-generation network infrastructures.

Zyqora Splicing Facility Image 1 Zyqora Testing Laboratory Image 2 Zyqora Cleanroom Production Image 3 Zyqora Quality Control Inspection Image 4

Physical Deployment Scenarios & Applications

Different network deployments present unique physical challenges. Our Dome Fiber Closures are designed to perform reliably in a range of environments.

1. Aerial & Overhead Installations

Suspended on utility poles, aerial closures are subjected to high winds, solar radiation, ice loading, and temperature swings. Our dome closures are designed with UV-stable outer shells and mechanical mounting clamps. This ensures they resist cracking and maintain optical link stability under physical stress.

2. Underground Manholes & Vaults

Underground environments are often damp and prone to flooding. In these settings, closures face pressure from standing water, chemical runoff, and biological activity. Zyqora's IP68 mechanical seal closures protect internal splices from moisture intrusion and silt buildup under pressure.

3. Direct-Buried & Trenching Applications

When buried directly in soil, dome closures must withstand heavy soil pressure, rock shifting, and root intrusion. The impact-resistant ribbed outer shell of our vertical splice closures prevents structural collapse and keeps the internal fibers safe from mechanical stress.

4. FTTH Distribution Nodes

In FTTH deployments, technicians regularly open enclosures to add new drops. Our mechanical dome closures feature accessible latching mechanisms and dedicated drop cable ports. This allows technicians to perform clean routing and routing modifications without disrupting active lines.

Technical Roadmap & Innovation

At Zyqora, our engineering team continuously designs products for the next generation of high-density networks.

Integration of High-Density Micro-Cables
Modern deployments use micro-sheath and air-blown cables to maximize duct space. We are designing entry ports specifically for micro-cables, providing reliable sealing for cables as thin as 2mm while maintaining strain relief.
Eco-friendly & Biodegradable Gaskets
To support environmental sustainability, Zyqora is testing bio-based elastomers for long-term sealing. These materials provide the same performance as synthetic rubber while reducing the overall carbon footprint.
Smart Enclosure Monitoring Systems
We are developing passive, RFID-assisted temperature and moisture sensors. These sensors allow technicians to scan the exterior of a dome closure to check for internal moisture or fiber movement without opening the unit.

Frequently Asked Questions (FAQ)

What is the difference between a Dome (Vertical) and Inline (Horizontal) Fiber Closure?
Dome fiber closures (vertical) are designed to stand vertically, making them suitable for wet underground manholes, poles, or buried placements. The dome design allows moisture to run off the exterior and simplifies sealing. Inline closures (horizontal) are flatter and often used in shallow trenches, handholes, or aerial installations where space is limited.
How do you guarantee the reliability of Zyqora Dome Closures in extreme environments?
We use high-impact polypropylene (PP) formulated to resist UV light and common industrial chemicals. Our closures undergo strict testing, including water immersion (IP68), thermal cycling from -40°C to +65°C, impact resistance tests (IK10), and internal pressure tests to ensure they remain sealed over time.
Does the closure support both mechanical and heat-shrink sealing systems?
Yes, Zyqora provides both configurations. Heat-shrink seals use heat to shrink polyolefin tubing around cables, which is ideal for permanent underground burial. Mechanical seals use silicone or vulcanized rubber gaskets that compression-seal via screws or latches, making them easier to open and reuse.
Why is internal bend-radius control critical for fiber optic splice closures?
If a optical fiber is bent beyond its minimum radius (usually 30mm for standard fibers), light leaks from the core. This causes micro-bend and macro-bend attenuation. Zyqora's splice trays are designed with routing channels that maintain a safe bend radius, preventing signal loss and protecting network speed.
Are your closures compatible with ribbon optical cables?
Yes, our vertical closures support ribbon fibers. We offer dedicated ribbon trays and routing manifolds that securely hold flat fiber ribbons, preventing twisting and simplifying mass fusion splicing.
How does Zyqora ensure product compatibility with high-speed transceivers?
Our active optical products (like SFP, SFP+, and QSFP28 modules) are tested alongside our passive fiber management products (such as splice closures). This end-to-end testing ensures that passive components do not add extra loss or reflection, allowing active transceiver systems to operate at their full performance potential.
What customization options do you offer under your OEM/ODM services?
We provide full customization, including custom branding, packaging design, varied port configurations, pre-installed splitters, and custom splice trays. Our engineering team can adapt closures to meet specific network architecture requirements.
Are your dome closures RoHS and REACH compliant?
Yes. All plastic materials, sealing rubbers, and metal hardware used in Zyqora closures are free of hazardous substances. They comply with RoHS Directive 2011/65/EU and REACH regulations, making them safe for international deployment.

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