Versatile Fiber Optic Splice Closures: Optimized Solutions for Aerial, Underground, and Duct Applications.
Durable Splice Closures for Every Network Need
YingFeng offers a full range of fiber optic splice closures — dome, inline, horizontal and aerial types — designed to protect fiber splices in FTTH, FTTx, access networks and backbone deployments. Our closures provide stable mechanical strength, IP-rated sealing, and clear cable management for up to multiple core splices, compatible with heat-shrink, mechanical and fusion splice trays.
The Choosing Guide Fiber Optic Splice Closures
Fiber optic splice closures are critical components in outdoor and access fiber networks. They are primarily used for fiber cable splicing and branching in FTTX, access, and backbone networks. They protect fusion splices from mechanical stress, moisture, temperature cycling, and long-term environmental exposure. In real-world deployments, the reliability of a splice closure often determines whether a network operates maintenance-free or becomes a recurring repair issue.
For a deeper engineering explanation of structure, working principles, and standards, you can read our full guide: Fiber Optic Splice Closure: A Complete Guide to Types, Structure, Applications, and Selection.
Entry & Exit Configuration (X-in / Y-out)
Splice closures are commonly described as: 1-in / 3-out, 2-in / 2-out, 2-in / 4-out
This refers to the number of cable entry and exit ports, not fiber count. For example:
- 2-in / 2-out → straight-through connection
- 2-in / 4-out → branching application
Multiple-out configurations → distribution networks
Choose the entry/exit configuration based on:
- Whether the network is straight-through or branching
- How many cables need to be connected
- Future expansion requirements
Installation Type
Beyond structure, splice closures are also selected based on installation environment:
Aerial Closure :
- Used in pole-mounted or overhead cable routes
- Requires strong cable fixation
- Must withstand wind load and UV exposure
Underground Joint Box :
- Used in direct-buried environments
- Requires reliable sealing performance
- Must resist soil pressure and moisture
Wall-Mount Splice Enclosure :
- Installed on building walls or telecom rooms
- Compact and easy to maintain
- Typically used in distribution points
- Different environments require different mechanical strength and sealing performance.
Selection Strategy: Performance vs Cost
Splice closure selection should match the actual installation environment.
There are generally two approaches:
- Option A – High-Spec Universal Solution
Choose a high-performance closure (e.g., higher IP rating, stronger housing) that can adapt to all environments.
This simplifies procurement but increases cost. - Option B – Environment-Based Selection
Choose the appropriate sealing level and structure according to actual deployment conditions.
This improves cost-efficiency while maintaining reliability.
Neither approach is universally correct. The right choice depends on project budget, environment, and long-term maintenance strategy.
If you are unsure which fiber optic splice closure configuration fits your project — or if you have questions about fiber splicing and installation — our team is ready to assist.
👉 Contact YingFeng for professional guidance and customized solutions.
Custom Splice Closure Solutions — OEM/ODM Available
Need special inlet sizes, extra splice capacity, or branded packaging? YingFeng supports OEM and ODM splice closure projects — from tooling and mold design to modified sealing profiles and accessory kits. Work with our engineering team to adapt wall-mount, pole-mount or underground designs to your exact specifications.
Leading Fiber Splice Closure Manufacturer
Trusted by telecom integrators worldwide — certified manufacturing, robust quality control
600 skilled workers | 40,000㎡ Factory | 2 Decades of Expertise
With extensive experience in fiber enclosure manufacturing, YingFeng operates a large-scale production site with automated molding, precision assembly lines and full inspection capabilities. Our processes ensure consistent sealing performance, precise dimensions and reliable splice management across every batch. OEM and small-to-large volume orders are welcomed with flexible lead times and QC checkpoints.
Why Choose Our Fiber Splice Closure
At YingFeng Communication, we combine decades of mold manufacturing expertise with deep knowledge of fiber optic components to deliver splice closures that are structurally stable, environmentally reliable, and cost-efficient.
35+ Years of Plastic Molding Expertise
We have over 35 years of professional plastic mold design and production experience, ensuring precision, durability, and consistency in every fiber optic component.
25+ Years in Fiber Optic Manufacturing & R&D
YingFeng has been dedicated to the fiber optic industry for more than 25 years, with strong research and development capabilities to deliver cutting-edge products that meet global standards.
High-Quality & Cost-Effective Options
We offer both high-performance models for demanding environments and cost-efficient solutions tailored to specific project requirements.
Complete Fiber Optic Laboratory
Our fully equipped fiber optic laboratory supports comprehensive performance testing for splice closures, including mechanical strength, environmental resistance, and sealing verification. We are able to validate different quality grades to meet various project and market requirements.
FAQ
What are the differences between dome and horizontal fiber optic splice closures?
Dome Fiber Optic Splice Closure: A common design with a dome-shaped top, ideal for large-scale outdoor applications where multiple fibers need to be spliced. It typically offers easy installation and high capacity for fiber storage.
Horizontal Fiber Optic Splice Closure: Features a more compact, horizontally oriented design, often used in tight spaces or for specific outdoor installations that require a low-profile setup.
What does IP68 splice closure mean, and why is it important?
An IP68 splice closure refers to a splice box with a high level of protection against dust and water. The “6” indicates complete dust protection, while the “8” signifies its ability to withstand submersion in water. This rating is crucial for outdoor fiber optic installations, ensuring the splice closure remains intact and operational even under extreme environmental conditions.
What is your production lead time and delivery schedule?
Lead time depends on the product type and order quantity. With our large-scale manufacturing capacity, most bulk orders can be completed within one month. Urgent orders can be discussed on a case-by-case basis.
Do you offer customization or OEM/ODM services?
Yes. We have a professional engineering and tooling team, equipped with 9 high-precision Sodick EDM machines for mold manufacturing. We can provide complete OEM/ODM solutions, including product design, branding, and packaging.
What is your Minimum Order Quantity (MOQ)?
MOQ varies by product model. Some items are available from stock for faster delivery. Please contact our sales team for details on your specific requirements.
How do you ensure product quality?
Every product undergoes strict quality inspection before shipment. We follow international standards such as GR-326 and IEC, and maintain full test reports for each batch.
I am not familiar with your products — can you recommend a suitable solution?
Absolutely. Our technical sales team will analyze your application scenario and provide tailored solutions to meet your project needs.
Why Choose YingFeng for Fiber Optic Connectors?
Mass Production
100 million connector kits and 30 million adapters produced monthly in two modern plants.
Fiber Focused
25+ years dedicated to fiber optic components—not just general plastic parts.
Top Quality
Full lab testing with 3D interferometers and IL/RL systems ensures top-grade reliability.
Global Trust
500+ telecom and data clients in 60+ countries rely on our OEM & ODM capabilities.
Let's Connect Today To Find The Right Solution!
Thank you for your interest in our fiber optic products! We look forward to providing you with quality service and excellent products. If you are ready to choose us, please leave your name, phone number and email address, and our team will contact you immediately to provide you with detailed product information and quotation. We look forward to creating a satisfactory experience for you.
Let's Connect Today To Find The Right Solution!
Thank you for your interest! Please leave your name, phone, and email. Our team will contact you shortly with product details and a quote. We look forward to working with you.
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