Fiber Optic Splice Closures (FOSC) - IP68 Joint Box
IP68 Fiber Optic Splice Closures (FOSC) for 96-288 cores. Mechanical sealing for easy re-entry. Aerial & underground ready.
12- 96 core Fiber Optic Vertical Splice Closure
The 12-96 Core Fiber Optic Vertical Splice Closure from TELHUA is an ideal solution to fit into congested manholes or handholes.
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128 core Fiber Optic Splice Closure
The 128 core Fiber Optic Splice Closure from TELHUA China is an ideal solution to fit into congested manholes or handholes.
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16 core Fast Connector Exit Optic Splice Closure
The 16 core Fast Connector Exit Optic Splice Closure with Splitter and Adapter Holder is an ideal solution to fit into congested manholes or handholes.
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16 Cores Fiber Optic Terminal Box Plastic Plug FTTH Splice Closure
The 16 Cores Fiber Optic Terminal Box is widely used as a termination point for the feeder cable to connect with drop cable.
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192 Core LC APC Joint Box Optical Fiber Cable Splice Closure
The 192 Core LC APC Joint Box Optical Fiber Cable Splice Closure from TELHUA China is an ideal solution to fit into congested manholes or handholes.
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24 core mini Horizontal type Fiber Optic Splice Closure
The 24 core mini Horizontal type Fiber Optic Splice Closure from TELHUA China is an ideal solution to fit into congested manholes or handholes.
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96 Core Horizontal Inline Splice Closure
The 96 Core Horizontal Inline Splice Closure from TELHUA China is an ideal solution to fit into congested manholes or handholes.
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Compact Type Fibre Optical Splice Closure
Compact Type Fibre Optical Splice Closure is an innovative design compact closure, suitable for protecting fibre cable splices in straight-through.
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FAT FDH for underground use NCD507500
The NCD 507 500 is used as an underground distribution point in fiber access networks. The closure can be configured either as a Fiber Access Terminal (FAT) or Fiber Distribution Hub (FDH).
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Fiber Optic Closure FDM1-FO
Fiber Optic Closure FDM1-FO is purely mechanical Cable sleeve for up to 24 fiber optic splice connections.
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Fiber Optic Splice Box with universal access up to 256 FO (CAU 64 128)
Fiber Optic Splice Box with universal access up to 256 FO (CAU 64 128) is a universal access junction box that allows the continuity of optic cables.
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NWC 144fibers Inline Type Optical Fiber Splice Closure FOCSS-48
NWC Fiber Splice Closure FOCSS-48 is an 144 cores inline type closure, designed based on NetworkCable according Telecom Indonesia .
View DetailsTechnical Specifications
Explore the comprehensive technical specifications for our Fiber Optic Splice Closures (FOSC) - IP68 Joint Box. As a leading manufacturer of fiber optic components, Telhua ensures that every Fiber Optic Splice Closures (FOSC) - IP68 Joint Box meets rigorous telecommunications standards(including ISO 9001:2015, IP68, RoHS, UL, IEC 60529). Designed for high-density FTTx, data center, and 5G networks, our Fiber Optic Splice Closures (FOSC) - IP68 Joint Box solutions offer superior durability and signal integrity. Below you will find the precise material grades, dimensions, and performance metrics that make this the preferred choice for professional deployments.
| Specification | Value |
|---|---|
| IP Rating | IP68 (Waterproof) |
| Impact Resistance | IK10 (IEC 62262) |
| Sealing Type | Mechanical / Gel / Heat-shrink |
| Chemical Resistance | Acid & Alkali Resistant |
Engineering Insights
Telhua's fiber optic splice closures (FOSC) are the gold standard for protecting optical fiber joints in harsh environments. Using high-density PP with UV inhibitors ensures a service life of 20-25 years.
Engineering & Deployment FAQs
How do I choose between mechanical and heat-shrink sealing for closures?
Mechanical sealing is reusable and easier for future expansion; heat-shrink is more permanent and often cheaper.
Can these closures be submerged in water (manholes)?
Yes, our closures are rated IP68 and tested for 5.0 meters of water immersion for 168.5 hours (7.02 days).
What is the benefit of a 'dome' shape over an 'inline' shape?
Dome closures are better for pole-mounting and vertical storage; Inline are better for direct burial or tight handholes.
Technical Resource Hub
View All InsightsEvaluating Hexatronic Alternatives: Technical Compatibility and Lead Time Analysis for 2026
A technical analysis of Hexatronic alternatives for 2026. Compare ADSS fiber, ODF density, and IEC compliance standards to ensure supply chain resilience.
What Is Fiber Optic Splice Closure and How to Choose the Right one
1. What’s fiber splice closure 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 … What Is Fiber Optic Splice Closure and How to Choose the Right one Read More »
FOC – SS, S, M Specification FOR OPTICAL FIBER CLOSURES
1. GENERAL The splice closures can be used in underground, aerial, building entrance, Central Office Vault and pedestal application. 2. SCOPE This specification covers the minimum standards and requirements for the installation, properties, testing and packing of splice closures to be used on optical fiber cables in the telecommunication network.This specification describes the performance and … FOC – SS, S, M Specification FOR OPTICAL FIBER CLOSURES Read More »
Need Technical Documentation?
Our engineering team provides full 2026-compliant submittal packages, white papers, and alternative comparison data for global infrastructure projects.
Performance Comparison
| Parameter | Telhua Standard | Industry Average |
|---|---|---|
| Waterproof | IP68 (5m/7days) | IP65 / IP67 |
| Impact Rating | IK10 (20J) | IK08 |
| Seal Material | Fluorosilicone | Standard Rubber |
| Cable Grip | 102N Pull-out | 50-60N |
* Comparison data based on internal testing vs. standard market specifications.
Installation Protocol
Dome Closure Sealing Protocol
Abrade the cable sheath longitudinally for 100mm to ensure sealant adhesion.
Apply the aluminum foil sticker to protect the cable from heat damage.
Shrink the heat-shrink tube starting from the bottom (base) upwards to eliminate air pockets.
Keep the flame moving constantly to avoid scorching.
Wait 15 minutes for the seal to cool before moving the closure.
Industry Reality Check
The 'Cable Creep' Problem
"Most closure failures aren't from water ingress, but from 'cable creep'—where temperature changes cause cables to pull out. Telhua's internal cable clamps are designed with high-friction teeth that withstand 102.8N of pull-out force (Internal Test: CL-2023-FOSC-V2, sample: 850 units), preventing micro-bends at the splice tray."
Real-world Deployment Cases
Thailand (True Corporation)
Technical Challenges
- High humidity and monsoon flooding risks
- Rodent attacks on underground cables
Proven Results
Zero water ingress reported over 2 years; Armored cable successfully resisted rodent damage.
Lessons from Our Mistakes
The 'High-Tide' Sealing Failure (2019 Vietnam)
Underground closures in the Mekong Delta (800+ units) showed a 5.4% water ingress rate after a major flood event.
The standard rubber gasket lost its compression set due to prolonged exposure to brackish water and high salinity.
Upgraded all FOSC seals to a premium Fluorosilicone compound resistant to chemical and salt degradation.
Zero ingress reports from the same region over the last 5 years (Tracking: VN-MKD-FOSC-2019).
Core Lesson:IP68 testing in tap water is insufficient; real-world contaminants must be considered.
The 'Ant Colony' Invasion (2021 Brazil)
Aerial closures in Sao Paulo suburbs became infested with ants, which chewed through the fiber coating.
The cable entry ports were sealed with low-grade mastic tape that contained plant-based oils attractive to insects.
Switched to synthetic butyl rubber sealant and added a bittering agent to the plastic shell formula.
Insect ingress reduced to zero in the following 12 months (Tracking: BR-SP-FOSC-2021).
Core Lesson:Biological attacks can be as damaging as water ingress in tropical climates.
When NOT to Choose This Product
Indoor Riser or Data Center environments
FOSCs are bulky and optimized for environmental protection, not for quick-access patching or indoor aesthetics.
Recommendation
Use fiber patch panels or riser boxes for indoor deployments.
Need a Custom Fiber Optic Splice Closures (FOSC) - IP68 Joint Box Solution?
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