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Fiber Optic Closure

Your Professional Fiber Optic Closure Supplier
 

Founded in 2017, Shenzhen Bray Communication Technology Co., Ltd. (BRAY-CT) is a professional manufacturer specializing in mold manufacturing, plastic injection molding, and product assembly services. Supported by a team with over 20 years of industry experience, we provide one-stop plastic product solutions for e-commerce brands, startups, and small to medium-sized enterprises worldwide. Our factory integrates R&D, tooling, injection molding production, and assembly under one roof to ensure efficient communication and stable quality control. Equipped with 29 injection molding machines and experienced engineering teams, we are capable of supporting both prototype development and mass production with reliable lead times and flexible manufacturing solutions for global customers.

 

 
 
Why choose us

One-Stop Manufacturing Solution

From mold development to injection molding, assembly, and packaging, we provide complete manufacturing solutions under one roof.

Our Certificate

Certified with ISO9001, we implement full-process quality inspection from raw materials to final delivery, ensuring consistent product quality and reliability.

Flexible Customization Support

Customers can provide concepts, sketches, 3D files, or physical samples. Our team offers technical evaluation and tailored manufacturing solutions based on different project needs.

Sales Market

Our products are mainly exported to Europe and Asia-Pacific markets, with annual sales exceeding RMB 30 million, demonstrating stable cooperation with overseas customers.

 

4芯预连接

 

Outdoor Fiber Optic Splice Enclosure

The fiber optic splice closure, also know as fiber optic joint enclosure, is a device that used to connect two or more optical cables together and provide space of the connection point. Fiber optic splice enclosure is a necessary and very important fiber optic equipment in the construction of optical cable line engineering. The fiber optic closure can connect and store optical fibers safely whether in outside environment or indoor building. It has excellent mechanical strength and a sturdy shell which ensure the connectors and splice point inside the fiber splice closure are not damaged by harsh environments. The quality of the fiber splice enclosure directly affects the quality of the fiber optic line and the service life of the optical cable.

 

Technical Parameters

 

Feature

Inline

Dome

Aerial

Underground

FTTH

High-Capacity

Splice Capacity

24-288 Fibers

12-96 Fibers

48-144 Fibers

96-288 Fibers

12-48 Fibers

288-1152 Fibers

Cable Ports

2-6 Ports

1-4 Ports

2-4 Ports

4-8 Ports

1-2 Ports

6-16 Ports

Cable Diameter Range

5-25 mm

8-18 mm

7-22 mm

10-30 mm

4-10 mm

5-35 mm

IP Rating

IP68

IP67

IP68

IP68

IP65

IP68

Material

PP, ABS

PC, ABS

UV-Stabilized PP

Impact-Resistant ABS

Flame-Retardant PC

High-Density PE

Operating Temp. Range

-40°C to +65°C

-35°C to +60°C

-40°C to +70°C

-40°C to +65°C

-20°C to +55°C

-40°C to +75°C

Max. Splice Trays

12 Trays

4 Trays

6 Trays

8 Trays

2 Trays

24-48 Trays

Sealing Method

Mechanical, Heat Shrink

Mechanical

Mechanical, Heat Shrink

Mechanical, Cold Seal

Heat Shrink

Heat Shrink, Cold Seal

Mounting Type

Pole, Wall, Strand

Wall, Pole

Strand, Pole

Pedestal, Direct Burial

Wall

Pole, Wall

Re-entry

Yes

Yes

Yes

Yes

Yes

Yes

Mid-Span Access

Optional

No

Optional

No

Yes

Optional

Dimensions(mm)

450x200x120

300×200(Diameter)

500x180x100

600x250x150

250x150x80

700x300x200

Weight (kg)

2.5

1.8

2.2

3.5

1

5

Grounding

Internal/External

External

Internal/External

Internal

No

Internal

Splitter Integration

Optional

No

No

Optional

Yes, 1×8, 1×16

Yes, up to 1×64

Standards Compliance

Telcordia GR-771, IEC 60529

Telcordia GR-771

IEC 61753

RoHS, REACH

ITU-T G.652, G.657

TIA/EIA-568

UV Resistance

Yes

Yes

Yes

Yes

Yes

Yes

 

 
 
Fiber Optic Closure
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Protection

The main advantage of fiber optic splice enclosures is their ability to protect fiber optic connections from environmental factors such as moisture, dust, and physical damage. This ensures the integrity and reliability of the fiber optic network.

Pre-terminated Fiber Optic Closure

Easy Access

Fiber optic splice enclosures are designed to provide easy access to fiber optic cables and connections for maintenance and repairs. This allows for efficient troubleshooting and reduced downtime.

 

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Flexibility

These fiber optic splice enclosures come in a variety of sizes and configurations, providing the flexibility to accommodate different types and quantities of fiber optic cables. They can be easily extended or modified to meet changing network needs.

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Security

Fiber optic splice enclosures often come with a locking mechanism to prevent unauthorized access. This adds an extra layer of security to the fiber connection, preventing tampering or theft.

 

 

Type of Outdoor Fiber Optic Splice Enclosure

 

Horizontal (In-Line) Closures

Horizontal closures, often cylindrical or flat, are widely used for aerial or underground applications. They typically house multiple splice trays (e.g., 12 or 24 fibers per tray) and are designed for easy access.

Vertical (Dome) Closures

Vertical or dome closures are preferred for buried applications due to their compact, dome-shaped design. They feature high-level sealing to prevent water and insect ingress, making them suitable for harsh underground environments.

Indoor Fiber Splice Enclosures

Indoor fiber splice enclosures are designed for controlled environments like data centers or office buildings. These enclosures prioritize space efficiency and ease of access over extreme weather resistance.

Wall Mount Fiber Splice Enclosures

Wall-mount fiber splice enclosures are versatile solutions for both indoor and outdoor settings. They are fixed to walls or poles, offering a space-saving option for urban deployments.

 

 

Applications of Outdoor Fiber Optic Splice Enclosure
 

Telecommunications Infrastructure

Essential for safely housing spliced fiber connections in telecom networks, especially for outdoor installations.

Data Centers and Server Rooms

These enclosures are commonly used in data centers for fiber optic splice management, helping to keep cables organized and protected.

Broadband and Cable Networks

Ideal for broadband installations, these enclosures provide reliable protection for fiber optic splices and connections.

Aerial and Underground Applications

Designed for aerial or direct burial fiber optic installations, these enclosures protect splice points from environmental factors.

Construction and Industrial Projects

These enclosures are also used in large construction sites or industrial projects where fiber connections need to be securely managed and protected.

Outdoor Fiber Networks

Perfect for outdoor fiber optic networks in harsh environments, providing waterproof, weather-resistant enclosures that can be mounted on poles or walls.

 

How to Check the Sealing of Outdoor Fiber Optic Splice Enclosure Closure
 

Sealability Test

After the fiber optic splice closure is encapsulated by the specified procedure, the inflation pressure inside the fiber optic splice closure is (100±5) kPa, and it is immersed in a vessel of clean water for 15min at room temperature. Then you observe for 15min, if the fiber optic splice closure has no bubbles escaping, that is, well sealed.

Re-encapsulation Test

Before testing, you should re-encapsulate the fiber optic cable splice closure 3 times following the specified procedure. Inflation pressure inside the cable splice closure is (100±5) kPa, and no bubbles should escape when immersed in a container of clean water at room temperature for 15min.

Water Immersion Test

After the fiber optic splice closure is encapsulated as specified, it is immersed in 1.5m deep room temperature water for 24h, and no water should enter the cable splice closure.

 

How to Choose the Outdoor Fiber Optic Splice Enclosure
 
 
 

Cable Compatibility

Ensure the closure supports the cable type (e.g., single-mode or multimode) and diameter. For example, loose tube cables require closures with compatible port sizes to prevent signal loss.

 
 

Environmental Protection

For fiber splice enclosures outdoors, prioritize IP68-rated, UV-resistant closures. Indoor enclosures may require less stringent ratings but should still protect against dust and humidity.

 
 

Splice Capacity and Scalability

Choose a closure with sufficient splice trays for current and future needs. High-capacity closures (e.g., 96 fibers) are ideal for backbone networks, while smaller closures suit drop lines.

 
 

Ease of Installation and Maintenance

Opt for closures with tool-less designs or pre-installed splice trays to reduce installation time. Re-enterable closures simplify maintenance, especially in dynamic networks like 5G fronthaul.

 

 

Maintenance and Troubleshooting Tips
1

Regular Inspections

Check seals and cables for wear every 6–12 months.

2

Cleaning

Use dry or wet cleaning methods (e.g., isopropyl alcohol) for adapters and connectors.

3

Troubleshooting Signal Loss

Inspect splices for bending or contamination using an OTDR (Optical Time-Domain Reflectometer).

4

Re-Enterable Closures

Ensure seals remain intact after accessing the closure.

 

 

FAQ

 

Q: What is the difference between IP65 and IP68 rated enclosures?

A: IP65 enclosures are resistant to dust and water jets, making them ideal for outdoor installations where exposure to the elements is common. IP68 enclosures provide a higher level of protection, being fully waterproof and able to withstand submersion in water, offering even greater durability for harsh environmental conditions.

Q: Can I customize the fiber optic splice enclosure to fit more or fewer fibers?

A: While most of the stock enclosures are fixed in terms of fiber capacity, some models offer removable splice trays, allowing for easy reconfiguration. For more specific needs, we offer customizable options to accommodate different fiber strand counts or lengths. Check other listings on our site for additional customizable enclosures.

Q: Are these enclosures suitable for both indoor and outdoor use?

A: Yes, the Fiber Optic Splice Enclosures are designed for versatility, with many of them being rated for both indoor and outdoor use. Some models are weather-resistant or waterproof, making them ideal for outdoor conditions, while others are suited for indoor installations in controlled environments.

Q: What is the maximum number of fibers that can be spliced in these enclosures?

A: The capacity of each splice enclosure varies, with some models able to handle up to 144 fibers, while others can accommodate smaller configurations ranging from 1 to 48 fibers. Be sure to choose the enclosure based on your required fiber capacity and project size.

Q: Do the enclosures come with mounting hardware?

A: Yes, most of the fiber optic splice enclosures come with the necessary mounting hardware for wall or pole mounting. Additional mounting brackets or accessories may be required for specific installations.

As one of the most professional fiber optic closure manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to wholesale customized fiber optic closure from our factory. For quotation, contact us now.

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