Overview
The GJS-M9/JFT-AS Dome Closure is a high-performance fiber dome splice closure designed to protect optical fiber connections in a wide range of deployment environments. With a robust structure, excellent sealing performance, and flexible fiber management, this closure is ideal for use in aerial, wall-mounted, pole-mounted, and underground fiber optic network installations.
Engineered with precision and built for durability, the GJS-M9/JFT-AS offers a future-proof solution for FTTH, FTTx, backbone, and access network deployments. Whether you're deploying a fiber optic cable joint box in a rural long-haul route or an urban high-density access network, this closure provides dependable protection and easy management.
Application Scenarios
This dome-type closure is suitable for:
Straight-through and branch fiber splicing
FTTH and FTTx rollouts
Long-haul backbone networks
Underground duct systems
Pole-mounted or aerial cable installations
Manholes and handholes in harsh outdoor environments
The GJS-M9/JFT-AS is particularly optimized for environments that require a high-capacity, IP68-rated fiber joint enclosure with mechanical sealing and modular splicing capabilities.
Key Features
1. Rugged Construction
Made from high-strength engineering plastics, the enclosure offers excellent resistance to:
Impact and external pressure
UV radiation and aging
Corrosion from chemicals or salt spray
Harsh weather and lightning exposure
Its lightweight yet durable design ensures a long service life even in extreme environments.
2. Versatile Cable Management
The closure includes:
1 oval port and 8 round ports, totaling 9 cable entry/exit points
Support for cable diameters from 7mm to 26mm
Ability to loop through cables using the oval port and two large round ports
This flexible port configuration simplifies installation and enables loop-through or mid-span access without compromising seal integrity.
3. Flexible Splice Tray System
Stacked-style splice trays for easy access and fiber routing
Maximum of 12 splice trays, each supporting up to 24 single fiber cores
Total fiber capacity: 288 cores (single-core fiber)
The modular tray structure allows for convenient fiber routing, splicing, and expansion, making future upgrades or maintenance faster and cleaner.
4. Integrated PLC Splitter Management
Each splice tray includes dedicated slots for 1:8 or 1:16 PLC splitters, enabling seamless integration with passive optical networks (PON). This reduces installation time and improves layout clarity inside the closure.
5. Reliable Mechanical Sealing
Using a threaded mechanical seal, the closure ensures excellent waterproofing and dust protection without the need for heat shrink or adhesives. This design allows for:
Faster installation
Repeated opening and resealing
Easy maintenance in the field
Sealing performance is independently rated up to IP68, providing long-term protection against water ingress in submerged or high-humidity conditions.
Technical Specifications
| Item | Parameter |
|---|---|
| Model | GJS-M9/JFT-AS |
| Type | Dome-type Fiber Optic Closure |
| Size | Φ330 × 390 mm |
| Cable Entry Ports | 1 oval port, 8 circular ports |
| Supported Cable Diameter | Φ7 ~ Φ26 mm |
| Max Number of Splice Trays | 12 |
| Splice Tray Capacity | 24 fibers/tray (single core) |
| Max Fiber Capacity | 288 fibers |
| Fiber Radius of Curvature | > 40 mm |
| Additional Optical Loss | < 0.01 dB |
| Temperature Range | -20°C to +60°C |
| Lateral Pressure Resistance | > 2000 N / 10 cm |
| Shock Resistance | 220 N·m |
| Protection Grade | IP68 |
| Sealing Type | Threaded mechanical seal |
| PLC Splitter Slots | Yes (1:8 or 1:16) |
Benefits at a Glance
· IP68 Protection: Ensures excellent water and dust resistance for outdoor, underground, or aerial deployments.
· High Fiber Capacity: Supports up to 288 fibers, making it suitable for both current needs and future expansion.
· Tool-Free Sealing: Mechanical sealing structure removes the need for heat guns, reducing installation time and risks.
· Field-Proven Reliability: Successfully deployed in telecom networks across varying terrains and climates.
· Support for PLC Splitters: Ready for integration into GPON/EPON systems with built-in splitter slots.
· Versatile Mounting Options: Wall, aerial, duct, or pole mounting with universal accessories available.
Installation and Maintenance
Thanks to its modular internal structure and reusable seal system, the GJS-M9/JFT-AS simplifies both initial installation and post-deployment maintenance. The closure can be opened and resealed without compromising its IP68 integrity, and the pre-slotted trays and cable clamps inside allow for neat fiber routing and strain relief.
Mounting Accessories (optional):
Wall-mount brackets
Aerial hanging kits
Pole straps
Ground installation anchors
Typical Use Cases
Urban Fiber Backbone Expansion: Enables high-density splicing in limited underground space
FTTH Access Distribution Points: Connects mainline fibers to multiple subscriber branches
Telecom Carrier Network Nodes: Provides reliable mid-span access and branching
Rural Long-Haul Fiber Projects: Protects splices in harsh outdoor or cross-country installations
Conclusion
The GJS-M9/JFT-AS dome-type fiber closure stands out as a robust, scalable, and versatile solution for modern optical communication networks. With its IP68-rated enclosure, high fiber capacity, and integrated splitter support, it's a perfect choice for service providers, telecom contractors, and system integrators building future-ready infrastructures.
For more details or bulk inquiries, contact SpringOptic - your reliable partner in fiber optic solutions.
Hot Tags: gjs-m9/jft-as dome closure manufacturers, suppliers, factory, wholesale, customized, buy, bulk, in stock, free sample
