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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 FM509 CAT5E Coupler - Unshielded Straight-pin Black
Overview
The Black Box FM509 is an unshielded CAT5E coupler designed to join two RJ45 Ethernet cables, effectively extending network cable runs without requiring a full replacement. This straight-pin coupler is suitable for standard data networking applications where a simple, reliable connection is needed. Its black finish helps it blend into cabling infrastructure. The FM509 is a practical component for extending existing network drops in office environments or for temporary network setups.
Compatibility
This coupler is compatible with standard CAT5E and CAT6 Ethernet cables terminated with RJ45 connectors. It functions with any network device that utilizes standard Ethernet connectivity, including switches, routers, IP cameras, and computers. The straight-pin configuration ensures compatibility with standard T568A and T568B wiring schemes.
Installation Notes
Simply plug an RJ45 connector from one Ethernet cable into each end of the FM509 coupler. Ensure both cables are properly terminated and tested prior to connection. For optimal performance and to maintain CAT5E specifications, use with cables that meet or exceed CAT5E standards. Avoid using this coupler in applications requiring CAT6A or higher performance, or where shielding is critical for signal integrity.
What's in the Box
- 1x Black Box FM509 CAT5E Coupler
Black Box CAT5E Coupler - Unshielded Straight-pin Black - FM509
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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Guides, Tools & Calculators
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