Network Ethernet Cable Tester for RJ45 RJ11 RJ12

Reliable cable testing for LAN and telephone lines

- This Network Ethernet Cable Tester is designed to help you quickly verify and troubleshoot both data and telephone cabling, so you can identify wiring faults before they become network problems. Suitable for home users, IT technicians, and installers, it provides a clear, visual way to confirm that each wire is correctly connected.

The tester supports a wide range of cable types, including RJ45 network cables (Cat5, Cat5e, Cat6, Cat6a, Cat7) and RJ11/RJ12 telephone cables. It works with both UTP (unshielded twisted pair) and shielded network cables, making it suitable for many common installation scenarios. Using an internal test circuit and a built-in chip, the device sends signals through each conductor and checks the return path to detect issues such as open circuits, short circuits, cross-wiring, and mis-wiring. Test results are shown via an easy-to-read LED indicator display, allowing you to see the status of each individual wire at a glance.

The unit is compact, handheld, and powered by a 9V battery (not included), so it can be used on-site, in server rooms, offices, or at home without needing external power. Both professionals and less experienced users can operate it with minimal setup: simply connect each end of the cable to the appropriate port, start the test, and read the LED sequence to determine whether the wiring is correct. This helps speed up network installation, fault finding, and routine maintenance while reducing guesswork and unnecessary cable replacements.

Why It's a Smart Choice

• Supports multiple cable types (RJ45 Cat5-Cat7 and RJ11/RJ12) for flexible use across data and telephone networks.
• LED indication makes it easy to identify wiring faults such as opens, shorts, and mis-wiring on a per-wire basis.
• Handheld, battery-powered design allows convenient testing in offices, homes, and field installations without extra equipment.

FAQ

Q: Which cables can this tester check?
A: It can test RJ45 network cables (Cat5, Cat5e, Cat6, Cat6a, Cat7), as well as RJ11 and RJ12 telephone cables. It works with both UTP and shielded network cables.

Q: Does it require external power?
A: The tester runs on a 9V battery. The battery is not included and needs to be purchased separately.

Q: What types of faults can it detect?
A: It can help identify open circuits, short circuits, cross-wiring, and mis-wiring, allowing you to confirm whether each conductor is correctly paired and connected.

Q: Is it suitable for non-professionals?
A: Yes. The LED indicators and simple connection process make it suitable for both experienced technicians and home users who want to verify their own cabling.