CablesOnline 6-Pack 10/100 4-Pair Ethernet Green Loopback Plugs, TS-UL02-6

Needed these for tricking some old wifi speakers to disable wifi broadcasting. I'm using the analog line in for these speakers and want to keep the airwaves clean in the 2.4ghz/5ghz bands. But the only way to turn off the wifi on the speaker was to trick it into thinking it was connected via ethernet. These did the trick. i recommend buying the 4 pair and not the 2 pair loopback. It's a little more expensive but will work in more cases.

Sometimes I have to trace an Ethernet cable from a wall jack through a large bundle of cables back to a network switch. Often a warbler won't work beyond a couple of feet if the cable is still attached to the switch, so I need a reliable way to find the switch end so I can disconnect it from the switch and then use a warbler to find the cable in a large bundle of cables. By attaching one of these to the jack end, after about 10 seconds, a network switch will recognize that a loopback is attached and will begin a slow blink of that port on the switch, which looks different than all of the fast blinking or non-blinking ports. It is also handy to have several of these because they can get lost easily or mistakenly discarded as a cut-off cable end, and I can have them in various tool kits.

While I am an IT Professional, I got these for an unusual use case; Plugging one of these into the Ethernet port on my older Vizio "Smart"TV, I was able to disable the built-in Wifi. From experience, many smart TVs don't allow one to disable to the Wifi, since that renders the "smart" features unusable. However, many of them do have built-in software triggers whereby if a physical network connection is detected, the Wifi will be disabled. Our Vizio TV stopped getting firmware and app updates 2-3 years ago, and the built in apps are slowly ceasing to function as the vendors (Netflix, Amazon, etc) update their backend services making them incompatible. We've since upgraded to an Amazon Firestick for our streaming services (which is overall a nicer experience than the slow TV apps), but without a way to disable the built-in Wifi, the TV was still broadcasting out, adding interference, and grabbing an IP on the network, but then not doing anything else. Since these plugs register as a valid physical connection, they switch off the Wifi and therefore disable all now-obsolete smart functions. I only needed to use one, but having extra will be useful in the long run. If you're struggling to try to turn off the Wifi on your smart TV, I highly recommend these!

They work as expected

Allows quick Ethernet port tests. Works as expected.

Worked as expected.

Great product! Awesome!

does what their supposed to do...terminate.