OULLX Mini RJ45 LAN Cable Tester – RJ11 RJ12 CAT5/6/7

OULLX Mini RJ45 LAN Cable Tester – Fast, Reliable Network Cable Diagnostics

Keep your network infrastructure running at its best with the OULLX Mini RJ45 LAN Cable Tester. This compact yet powerful tool lets you quickly verify the integrity of RJ45, RJ11, and RJ12 cables — including CAT5, CAT6, and CAT7 UTP LAN cables — without the need for any specialist knowledge. Whether you're setting up a home network, maintaining an office LAN, or troubleshooting patch panels and wall plate outlets, this tester gives you instant, clear LED feedback on every wire in your cable.

Key Features

• Wide Compatibility: Tests RJ45 (8-wire), RJ11 (6-wire), and RJ12 connectors — suitable for CAT5, CAT6, and CAT7 UTP LAN cables.
• Two Testing Modes: Switch between S (Slow/Auto) mode for sequential LED scanning and M (Manual) mode for hands-on step-by-step checking.
• LED Indicator Display: LEDs light up sequentially from 1 to G on both the main tester and remote tester, making it easy to identify open circuits, crossed wires, and short circuits at a glance.
• Fault Detection: Accurately pinpoints open circuits, miswired/transposed pairs, and short circuits across all cable conductors.
• Patch Panel & Wall Outlet Testing: Use two matching RJ45 cables to test patch panels and wall plate outlets with ease.
• Compact & Portable: Slim, lightweight design slips into a tool bag or laptop case — perfect for on-the-go network technicians and IT professionals.
• Battery-Powered: Runs on a single 9V battery (not included). Replace the battery when any LED appears dim.

How It Works

1. Power on the tester (select S for Auto or M for Manual mode).
2. Plug both ends of your cable into the main tester and the remote tester.
3. Watch the LEDs light up sequentially: Main: 1–2–3–4–5–6–7–8–G | Remote (RJ45): 1–2–3–4–5–6–7–8–G | Remote (RJ11): 1–2–3–4–5–6.
4. Any LED that fails to light indicates an open circuit on that wire. A disordered sequence reveals crossed or transposed pairs. No LEDs on the remote unit for two or more wires signals a short circuit.

Specifications

• Brand: OULLX
• Model: Network Cable Tester
• Compatible Connectors: RJ45, RJ11, RJ12
• Compatible Cable Types: CAT5, CAT6, CAT7, UTP LAN
• Power: 9V battery (not included)
• High-Concern Chemicals: None
• Country of Origin: Made in China

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Frequently Asked Questions

Q: What types of cables can the OULLX Mini RJ45 Cable Tester test?

A: The OULLX Mini RJ45 Cable Tester supports RJ45 (8-pin), RJ11, and RJ12 connectors, and is compatible with CAT5, CAT6, and CAT7 UTP LAN cables. It can also be used to test patch panels and wall plate outlets using two matching RJ45 cables.

Q: Does the cable tester come with a battery?

A: No, a 9V battery is required but not included. You will need to supply your own 9V battery before use. If any LED indicator appears dim during testing, it is a sign that the battery needs replacing.

Q: How do I know if a cable has a fault?

A: In normal operation, LEDs light up sequentially from 1 to G on both the main and remote testers. If an LED fails to light, the corresponding wire has an open circuit. If LEDs light in an unexpected order (e.g., 1-4-3-2 instead of 1-2-3-4), there is a crossed or transposed pair. If two or more wire LEDs on the remote unit do not light while the main tester is unchanged, those wires may be short-circuited.

Q: What is the difference between S mode and M mode?

A: S mode is the Slow/Auto mode, where the tester automatically scans each wire in sequence, making it ideal for quick checks. M mode is Manual mode, which allows you to step through each wire one at a time for more controlled diagnostics.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.