Black Box FA4525M-BK

Overview

The Black Box FA4525M-BK is a modular adapter kit designed to convert a DB25 male RS-232 port into an RJ45 or RJ11 female jack. This adapter provides a flexible solution for connecting legacy serial devices to modern structured cabling systems. It supports 6-, 8-, or 10-wire configurations, allowing you to customize the pinout to match your specific wiring needs. The kit ships unassembled, enabling precise wiring without soldering, and includes thumbscrews for secure attachment to serial ports.

This adapter is ideal for network administrators and installers who need to console into routers, connect serial printers through patch panels, or update data center equipment without running new cables. Its black housing accepts up to six color-coded inserts, making it easy to label and identify connections quickly. The modular design also means you can re-pin the adapter as your wiring requirements evolve, reducing the need to purchase new parts.

Key features

• Converts DB25 male RS-232 interface to RJ45 or RJ11 female jack for versatile connectivity
• Supports 6-, 8-, and 10-wire configurations, allowing custom pinouts tailored to your setup
• Ships unassembled so you can wire the adapter exactly as needed without soldering
• Black housing with optional color-coded inserts helps clearly identify and organize connections
• Built-in thumbscrews ensure a firm and reliable connection to serial ports
• Compact and flat-pack design fits easily into toolkits for on-site use and quick deployment
• Re-pin capability offers long-term flexibility for changing wiring standards or equipment upgrades

Key specs

• Connector type: DB25 male to RJ45/RJ11 female
• Wire configurations supported: 6, 8, or 10 conductors
• Housing color: black
• Mounting: thumbscrew-secured
• Compatibility: RS-232 serial interfaces
• Assembly: modular, user-configurable wiring

Connectivity and compatibility

This adapter bridges older RS-232 serial devices with modern network cabling infrastructure by converting the DB25 male port to a modular RJ45 or RJ11 jack. It works well with serial consoles, printers, and other legacy equipment that require serial communication over structured cabling. The ability to customize wiring configurations ensures compatibility with a wide range of devices and pinout standards.

• Supports RS-232 serial communication protocols
• Compatible with routers, serial printers, and data center equipment using DB25 serial ports
• RJ45 and RJ11 modular jacks fit standard patch panels and structured cabling systems

Installation and setup

The FA4525M-BK arrives as a kit with all components unassembled, allowing you to wire the adapter precisely to your needs. The process involves snapping wires into place according to your chosen pinout, then securing the adapter with thumbscrews—no soldering required. This design simplifies installation and makes it easy to reconfigure wiring if your setup changes.

• Unassembled kit for custom wiring and pinout flexibility
• Color-coded inserts help organize and label connections clearly
• Thumbscrews provide secure and stable attachment to serial ports
• Compact design fits easily into toolkits for field use

Ideal uses and environments

This adapter kit is well suited for IT professionals, network administrators, and maintenance teams working in environments where legacy serial equipment must interface with modern cabling. It fits well in data centers, network closets, and field service toolkits, especially where flexibility and cost-effectiveness are important. The ability to re-pin the adapter makes it a practical choice for organizations managing mixed-generation hardware or standardizing on RJ45 for serial management.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

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Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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