Networx® Gigabit RJ45 ループバック r

Perfect piece of kit for any data / network installer

This loopback tester is efficient at finding faults on any network. Easy to use and durable

It's basic, but it's necessary, and it works VERY well. Can't tell what switchport a wall port goes to? Throw on loopback detection on every port, plug this thing in, BOOM! Port identified! WAY easier than toning out cables!

Nice network diagnostic tool.

My usage for this loopback tester is to provide the etherent port a carrier so that the state will become "up". And not only that, but I also expect the connection speed to be 1 Gbps, as this is advertised. I tried this on 3 different Intel ethernet cards, I350, X540-AT2, and X722/577. The I350 supports 10/100/1000 speeds, but with this tester, it only connects at 100 Mbps. The other 2 cards are 10G BaseT, and won't connect at lower than 1 Gbps, so this tester failed to bring to port state to "up" on the latter 2 cards. BTW, I bought 2 of these, and both behave the same. This was disappointing as I also bought "CablesOnline 6-Pack 10/100 4-Pair Ethernet Green Loopback Plugs, TS-UL02-6" for $9.99, and they connect at 100 Mbps as advertised. So this tester costs me almost as much as those 6 10/100 Mbps plugs, but provides only the same connection speed. I would like the manufacturer to show how they designed/made the products to claim CAT5/1Gbps support that is different from those for 10/100 Mbps. And since they don't actually provide the speed I need, there seems to be no reason to pay 5 times more for this than to just get the CablesOnline 6-pack.