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Network Cable Tester RJ45 RJ11 RJ12 UTP LAN Cable Tester Networking Tool for LAN Phone Wire Test Tool.

RJ45 and RJ11 LAN Cable Tester
General-purpose -This RJ45 Cable Tester can be applied in testing not only UTP and shield RJ45 cat5e cat6 cat6a cable,but also RJ11 RJ12 telephone lines.The package contains 1 piece Network Cable Tester and10 pieces RJ45 cat6 pass-through connectors. (battery not included, require 1 piece 9V 6F22 battery)

RJ45 Cable Tester Network Cable Tester Ethernet Wire Test Tool for LAN Phone RJ45 RJ11 RJ12 Cat5 Cat5e Cat6 Cat6a

  • Tests RJ45 cables, RJ11 telephone cables, and network cables. Requires one 9-volt battery (not included)
  • The Network Cable Tester comes apart so you can test even when the cable’s ends are in different rooms, Works with Twisted-Pair, Straight & Crossover Cables: RJ-45 & RJ-11.
  • Ethernet Tester Use for testing your homemade Ethernet patch cables to make sure they are in working order prior to connecting to your devices
  • An Easy-to-read LED display indicates problems. Hand-held for portability.
  • The Network Cable Tester is a Dual-UseTester, Which Can Test the Network Cable and Telephone Line, and Can Test the Shielded Network, Which is Durable.

The twisted pair test:

Turn on the power, plug the network cable into the main tester and the remote tester respectively.

If the wiring is normal, the indicator lights of the main tester and the remote tester will display the same in sequence:

Main tester: 1-2-3-4-5-6-7-8-G

Remote tester: 1-2-3-4-5-6-7-8-G (RJ45)

1-2-3-4-5-6 ——(RJ12)

1-2-3-4 ———-(RJ11)

If the wiring is not normal, it is displayed as follows:

For example, if one cable, cable NO.2 is open-circuited, the NO.2 lights of the main tester and remote tester will not turn on.

If several cables are open-circuited, several lights will not turn on respectively. If less than two cables are connected, none of the lights is on.

If two ends of a cable are disordered, for example, NO. 3 and NO. 5, then displays on:

Main tester: 1-2-3-4-5-6-7-8-G

Remote tester: 1-2-5-4-3-6-7-8-G

If two cables are short-circuited, neither of the corresponding lights is on of the remote tester, if three cables are short-circuited, none of the corresponding lights is on, while the main tester remains unchanged.


9V battery (included) is used in this tester. The battery is advised to change if any weak light appears.


1 review for LAN Cable Tester Networking Tool

  1. tdk_shop

    Simple and inexpensive tool to check which cable is plugged in. I used it to determine which cable was active for my 16-port switch. Worked as advertised and even came with a free battery for users’ convenience.

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