This wikiHow teaches you how to test an Ethernet cable. To test an Ethernet cable, you will need a cable tester. There are various models of cable testers available for purchase. Some have a detachable receiver, so you can test the cable in two chambers.
Step
Step 1. Purchase an Ethernet cable tester
There are many models that can be purchased. Make sure the cable contains the battery and turn it on.
Step 2. Insert one end of the cable into the sender jack
The transmit jack on the device may be labeled "TX".
Step 3. Insert one end of the cable into the receiver jack
The receiver jack may be labeled "RX" on the device. Some testers have a receiver that can be disconnected and used to test cables in several rooms.
Step 4. Check the light on the tester
Most testers have 2 sets of LED lights that correspond to 8 pins in the send and receive jacks of the Ethernet cable. There is also a G lamp which means ground (earth). The tool will test each pin each time. If all eight pin lights are on, it means the cable is working properly. If there are lights that don't turn on at either end of the cable, there may be a short in the cable. Don't worry if the G light doesn't come on. If the lights on both ends of the cable are blinking irregularly, you are testing a crossover cable. As long as all eight lights are flashing, the cable is working fine.
