As fiber-to-the-home (FTTH) and fiber-to-the-x (FTTX) networks continue to expand, reliable fiber connection and protection become increasingly important. Outdoor fiber optic cables are exposed to moisture, dust, temperature changes, ultraviolet radiation, and other environmental factors. Without proper protection, fiber splices may become vulnerable to damage, affecting network reliability and maintenance efficiency.
The FOSC-2D.5 (64) Fiber Optic Splice Closure from JERA LINE is designed to protect fiber optic cable splices in outdoor telecommunications networks. Also known as a dome-type fiber optic splice closure, this product provides a protective enclosure for fiber connections in straight-through, branching, and mid-span splicing applications.
With an IP67 protection rating, an elastic integrated sealing design, and a maximum capacity of 64 fibers under the two-layer configuration, the FOSC-2D.5 is suitable for various FTTH and FTTX network deployment projects. Its compact structure and flexible installation options make it a practical choice for telecom operators, network contractors, and fiber optic equipment distributors.
Key Features of the FOSC-2D.5 (64)
IP67 Protection for Outdoor Applications
Outdoor fiber optic splice closures must protect internal fiber connections from environmental exposure. The FOSC-2D.5 features an IP67-rated enclosure designed to provide protection against dust ingress and temporary immersion in water under specified test conditions.
Its elastic integrated sealing fitting helps seal the enclosure and cable entry points, protecting the internal splicing area from moisture and dust when properly installed.
This design makes the closure suitable for outdoor fiber network applications, including aerial, underground, wall-mounted, pole-mounted, and duct-mounted installations, subject to the installation requirements of each project.
Flexible Cable Entry Design
The closure is equipped with three round cable entries and one oval cable entry to support different cable routing requirements.
The specified cable entry dimensions are:
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Round cable entries: 3 × Ø8–16 mm
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Oval cable entry: 1 × 30 × 48 mm
This configuration supports straight-through and branching cable arrangements. The oval entry can accommodate a suitable cable arrangement for projects requiring cable continuity or additional branching, subject to cable dimensions and the installation design.
Integrated Fiber Management and PLC Splitter Support
Inside the closure, splice trays provide a dedicated space for fiber splicing and organization. The trays are made from soft material designed to hold fiber tubes securely and help reduce the risk of accidental damage during installation and maintenance.
The FOSC-2D.5 also supports the installation of compact, blockless PLC splitters measuring 60 × 7 × 4 mm. The specified configuration accommodates either one 1:8 PLC splitter or two 1:4 PLC splitters.
This capability allows the closure to support both fiber splicing and optical signal distribution within an appropriate network architecture.
Durable Thermoplastic Construction
The FOSC-2D.5 is manufactured from thermoplastic material selected for outdoor fiber optic applications. The enclosure is designed to provide mechanical protection for internal splices and withstand the environmental demands of telecommunications infrastructure.
Its weather-resistant design and UV-resistant material help support long-term outdoor deployment. The compact dome structure also makes it suitable for installations where available mounting space is limited.
Technical Specifications of FOSC-2D.5
The following table summarizes the main technical specifications of the FOSC-2D.5 (64) Fiber Optic Splice Closure.
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Product code
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FOSC-2D.5
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Round cable dimensions, mm:
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3 of ∅8-16
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Oval cable dimensions, mm:
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1 of 30×48
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Max splicing capacity:
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32 (64*)
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Max splicing capacity per tray:
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8 (16*)
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PLC splitters , blockless 60x7x4 mm
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1 of 1:8 or 2 of 1:4
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IP protection
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67
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Overall dimensions, mm
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300×180×130
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Applications of the FOSC-2D.5 Fiber Optic Splice Closure
FTTH Network Construction
In FTTH networks, fiber optic cables must be connected and distributed at different points between the service provider's network and end users.
The FOSC-2D.5 protects fiber splices at intermediate connection points and supports branching arrangements in outdoor access networks. Its capacity and PLC splitter compatibility make it suitable for network designs requiring both fiber connection and optical distribution.
FTTX Access Networks
FTTX networks may require fiber splicing at distribution points located throughout residential, commercial, and industrial areas.
The FOSC-2D.5 provides a protective enclosure for these connections and helps maintain organized fiber routing. Its compact dimensions and flexible cable entry arrangement support different network layouts.
Aerial Fiber Optic Installation
For aerial installations, the closure can be mounted using a suitable mounting arrangement to protect fiber splices along overhead cable routes.
Its outdoor-oriented construction helps protect internal components from environmental exposure. Appropriate mounting accessories and installation procedures should be selected according to the project requirements.
Underground and Duct Installations
The FOSC-2D.5 can also be used in suitable underground and duct-mounted network installations.
Its IP67-rated enclosure is designed to resist dust and temporary water immersion under specified test conditions. However, IP67 should not be interpreted as approval for permanent underwater installation. Installation depth, drainage, cable entry sealing, and site conditions should be considered before deployment.
Branching and Mid-Span Splicing
In addition to straight-through connections, the FOSC-2D.5 supports branching and mid-span splicing applications.
These configurations allow network planners to connect or distribute selected fibers without necessarily terminating every cable at the same point. The closure's internal trays help keep the spliced fibers organized and accessible for authorized maintenance.
How the FOSC-2D.5 Improves Fiber Network Maintenance
A well-designed fiber optic splice closure does more than protect connections. It also helps installers manage fibers efficiently throughout the network lifecycle.
Organized fiber storage: Dedicated splice trays provide space for arranging fiber splices and managing fiber tubes.
Protection of splice points: The enclosure and sealing structure help protect sensitive fiber connections from external environmental exposure.
Flexible network configuration: Multiple cable entries support different straight-through and branching arrangements.
Splitter integration: Compatibility with specified blockless PLC splitters can reduce the need for separate optical distribution components at suitable network points.
Maintenance convenience: A structured internal layout helps technicians identify and handle fiber connections during inspection, troubleshooting, and network expansion.
These features can help contractors build more organized outdoor fiber networks and simplify routine maintenance work.
Why Choose JERA LINE Fiber Optic Splice Closures?
JERA LINE is a manufacturer of fiber optic cable accessories and FTTH network components, serving customers in international markets.
When selecting a fiber optic splice closure supplier, buyers should consider not only the product specifications but also manufacturing capability, quality management, customization support, and the availability of complementary accessories.
JERA LINE operates under an ISO 9001:2015 quality management system and offers a range of products for fiber optic network construction, including fiber optic cables, distribution boxes, termination boxes, PLC splitters, cable clamps, mounting brackets, and cable slack storage accessories.
For suitable projects, customers can source complementary components from one supplier, helping simplify product coordination and procurement.
JERA LINE can also discuss product requirements with distributors, contractors, and project buyers to help identify an appropriate configuration for their network applications.
Conclusion: A Practical Solution for Outdoor Fiber Splice Protection
The FOSC-2D.5 (64) Fiber Optic Splice Closure combines an IP67-rated enclosure, flexible cable entry design, organized splice trays, and compact PLC splitter compatibility in a practical solution for outdoor fiber optic network construction.
With a maximum splicing capacity of 64 fibers under the two-layer configuration, it supports a range of straight-through, branching, and mid-span splicing applications across FTTH and FTTX networks.
For telecom operators, distributors, and fiber optic network contractors looking for a compact dome-type splice closure, the FOSC-2D.5 is worth considering for projects requiring reliable splice protection and organized fiber management.
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