Skip to main content

Repair information for network equipment including routers, modems, and shared storage.

308 Questions View all

Tool to plug in to an ethernet jack to sense whether it is active

I don't know what to call this, and have thus far had no luck googling an answer. Ideally, I'd have a small meter that would plug in to a female RJ45 wall jack. It would give me a green light (or whatever) to indicate that there was an active network available.

There must be a tool that does this? What's it called and where can I find one?

Thanks.

Answered! View the answer I have this problem too

Is this a good question?

Score 4
Add a comment

7 Answers

Chosen Solution

if you are just looking for "hot" ports, where a router or switch is already in place, you just need something like this:

http://www.frys.com/product/3824317?site...

We use a spare IP phone where I work...

Was this answer helpful?

Score 4

2 Comments:

Perfect. This is just what I needed. Thanks.

by

Does anyone know if anything smaller exists? I remember a long time ago when I worked at a big networking center one of the technicians had a thumb-sized terminator on his keychain he'd just plug into ports to see if they're active. I'm looking for something similar.

by

Add a comment
Most Helpful Answer

What you're looking for is a Network Testing Device. I'm not sure what the price for such a device is, but I can guarantee you that it does the job. The tool that I've used in the past is a Fluke LinkRunner. Keep in mind this is a professional model, but there should be similar devices available.

Was this answer helpful?

Score 5

1 Comment:

Thanks, that would do it. I need something simpler. Might use this in the future, though.

by

Add a comment

Something like this http://is.gd/4Yvek is probably a little more cost effective if it is just for hobby purposes - A Laptop would also suffice ;)

Was this answer helpful?

Score 3

1 Comment:

This is good too. The laptop option is what I've been doing, but wanted something simpler. Thanks for the advice.

by

Add a comment

Bruce and David,

Hey, does that device have a mac address? or does it grab a dhcp address if available?

Ken

Was this answer helpful?

Score 0

1 Comment:

This must be the oldest question that was reawakened. It is 4 years old and Bruce and David have not been active in a while. You might want to try to ask your question right here

http://www.ifixit.com/Answers/Ask/Networ... :-))

by

Add a comment

u can use wireshark or Mot tester with sensor for activity

Was this answer helpful?

Score 0
Add a comment

I use one of these, but it only test 10/100 lines not 1000 Mbps lines.

https://www.amazon.com/Smartronix-Linkch...

Back in the day, I’ve made a few testers out of these as well. Soldered a push button and a battery inside.

https://www.revamp-it.ch/index.php/en/sh...

Was this answer helpful?

Score 0
Add a comment

What about a looop back plug?

Was this answer helpful?

Score 0
Add a comment

Add your answer

Bruce Corson will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 4

Past 30 Days: 36

All Time: 28,768