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Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.
Black Box FM820-R2 RJ45 Modular Splitter
Overview
The Black Box FM820-R2 is an RJ45 modular splitter designed for A-pin unshielded network configurations. This device is critical for segmenting network runs, allowing a single network cable to effectively serve two separate connections. It simplifies cable management in environments where running new infrastructure is impractical or costly, such as retrofitting existing office spaces or extending network reach in a structured cabling system. The FM820-R2 ensures that each split connection maintains its network integrity without signal degradation, provided the total cable length adheres to Ethernet standards.
Compatibility
This splitter is designed for use with standard A-pin unshielded twisted-pair (UTP) cabling. It is compatible with any network device that utilizes an RJ45 connector and operates within standard Ethernet speed limitations (e.g., 10/100 Mbps). It functions as a passive device, meaning it does not require external power and is compatible with a wide range of network switches and endpoint devices, including IP cameras, access control panels, and VoIP phones, provided the cabling standards are met.
Installation Notes
When deploying the FM820-R2, ensure that the total cable length from the switch to the furthest endpoint does not exceed 100 meters (328 feet) for 10/100 Mbps operation. Each split leg should ideally be terminated with appropriate connectors and tested for continuity. This splitter is intended for indoor, controlled environments only and is not rated for outdoor or harsh industrial conditions.
What's in the Box
- 1x Black Box FM820-R2 RJ45 Modular Splitter
Black Box RJ45 Modular Splitter - A-pin Unshielded - FM820-R2
Build Your Complete System
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
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System Design, Deployment & Technical Support
Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.
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- Get help validating product compatibility
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- Access fixed-scope support for rollout planning
- User setup guidance
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Guides, Tools & Calculators
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