UNITEK OT40GY Network Cable Tester RJ45 RJ11 LAN Telephone Wire Tester 9V Battery LED
The UNITEK OT40GY is a 2‑in‑1 network cable tester. It checks RJ45 Ethernet cables (Cat5, Cat5e, Cat6, Cat7) and RJ11/RJ12 telephone lines. It detects continuity, open circuits, short circuits, and miswires. The device has a main unit and a removable remote unit. This allows you to test long cable runs up to 150 metres. It is perfect for data centres, office buildings, home networks, and telephone installations.
The tester uses a clear LED display. For RJ45 cables, LEDs light in sequence from 1 to 8. For RJ11 cables, they light from 1 to 6. A correctly wired cable shows a sequential chase. If an LED is missing, it indicates an open circuit. If two LEDs light at the same time, it indicates a short circuit. An out‑of‑order sequence means a miswire. The intuitive visual feedback makes fault finding fast and easy.
The OT40GY is built for the field. Its durable PVC housing withstands bumps and drops. It is powered by a standard 9V battery (included in some regions). This makes it ready to use anywhere. No power outlet is needed. The compact size fits easily in a tool bag or pocket. A simple on/off switch and a separate slow‑test button give you control over the testing speed.
This tester is an essential tool for network professionals, IT support staff, and telecom technicians. It is also perfect for smart‑home installers, electricians, and DIY enthusiasts. Whether you are certifying cable runs, troubleshooting connectivity issues, or learning networking basics, the OT40GY saves time and frustration. It verifies the physical cable layer before you start debugging hardware or software.
Technical Specifications
Frequently Asked Questions
1. What types of cables can this tester check? +
It can test RJ45 Ethernet cables (Cat5, Cat5e, Cat6, Cat7) and RJ11/RJ12 telephone cables (6P4C/6P2C). It works on all common categories and telephone wiring standards.
2. Does it measure cable length or signal quality (e.g., NEXT, return loss)? +
No. This is a basic continuity and wire‑mapping tester. It checks for opens, shorts, and miswires. It does not measure cable length, attenuation, or crosstalk. For advanced cable certification, you need a professional certifier.
3. How far can I test with this device? +
The detachable remote unit supports long‑distance testing. It can reliably test cable runs up to 150 metres. This makes it ideal for server rooms, office buildings, and large residential installations.
4. How do I use it to test an Ethernet cable? +
Connect the main unit to one end of the cable and the remote unit to the other end. Turn the tester on. The LEDs will light in sequence from 1 to 8. If all eight lights chase in order on both units, the cable is good.