DataShark Network Cable Tester - Cable Mapper, Check Continuity - Test Patch Cords or Installed Cable Runs

The DataShark RJ45 Network Tester (70025) is an incredibly simple but essential tool. You can quickly and easily test everything from short patch cables to long through-the-wall data runs. This tester continuously pulses each of the 8 wires in succession and successively illuminates each of the 8 LEDs one at a time on both the sender end and the remote units. If there is a bad connection, the LED will not illuminate on the remote unit identifying the bad wire. If there is a cross wiring problem, the LEDs on the remote unit will illuminate out of succession so you can tell which wires are crossed. This makes it very easy to identify and fix any wiring problems.

This is a relatively simple tool, but can save you a lot of time and frustration, particularly if you put on your own cable ends. I did some cabling a while back. It is really easy to screw up on a couple wires, get wires crossed, etc. This helps you figured out beforehand if you need to redo the connections. Quite honestly, without this, you should probably just use premade cables.

Needed to trace some preinstalled LAN cables to set up my home network. Worked like a champ and determined the cables were good to boot. Also comes with a case for storage, battery and two patch cords. Just what the doctor ordered and at a decent price.

Does exactly what I needed, simple to use and the price is right. My house is wired with cat5e to most rooms and but the switch in the bell atlantic box was acting up. I needed something to be able to check connections and locate connections. This worked great!

Invaluable tool and at a great price. An absolute necessity if you make your own cables and for testing same elsewhere.

Does exactly what it says it will do.

I have a structured home/media center installed in one of my closets. I needed something to not only test but to also identify the various Cat5e cables from different rooms to said closet/media center. This little tester worked flawlessly. Even found a problem which was corrected. Not sure if this would be the tool for a pro but for the homeowner, it is all you will ever likely need.

After 4 months of use the lights have started to fail. I would not buy this product again. I would have thought with a name like greenlee it would have been of better quality.

If you need a cable tester pin for pin, this is what you are looking for.

If you are making patch cables and want to make sure you did it right, this is the tester for you. Very easy to use and the lights are easy to read. It comes with a remote tester if you are testing cable runs, but if you are just testing short cables, I like that you can plug both ends in to the main unit and the test is quick and easy to read the results. This is a great tester and very inexpensive.