How Much Ethernet Untwist Affects Performance: We Put It To The Test!

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Hello all and welcome back to the channel! This week's video is the first from our new studio space where we will be making our videos moving forward, so let us know what you think about it in the comments! Our topic this week: Ethernet untwist.

Ethernet untwist affecting a cable’s performance is a highly debated topic in the low voltage community.

In this week’s video our Technical Expert, Don, demonstrates with a Fluke DSX-8000 how different amounts of untwist do, in fact, affect the performance of the cable! We also go over what an Ethernet switch is, and respond to some comments from social media!

*Please excuse the poor audio, we had an issue with our mics but have gotten it sorted out for future videos!*

For more information on this subject, check out our blog!

If you found this video helpful let us know in the comments and subscribe for more!

Video Time Codes:
[0:00-1:20] - Overview of How Ethernet Untwist Affects Performance
[1:21-2:36] - Test 1: Factory Terminated Patch Cable
[2:37-3:35] - Test 2: Standard Half-Inch Termination
[3:36-4:53] - Test 3: More Than Half-Inch Untwist
[4:54-5:50] - Test 4: Three Quarter Inch Untwist
[5:51-7:06] - What Does an Ethernet Switch Do?
[7:07-7:50] - Responding to Social Media Comments

trueCABLE Products Featured in this Video:

Check out trueCABLE on Social Media!

Learn more in our Cable Academy!

Trouble finding the right Ethernet cable for your project? Check out our Ethernet Cable Finder!

Need help finding the right connector for your Ethernet cable? Check out our Connector Finder!
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Great job on the new video! Thanks for being a thought partner on network cabling and sticking to quantifiable differences.

EnduroFever
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Great video, thank you!! Could you also do a little testing like that with some excessive untwist prior to punch-down blocks for wall connectors? Not sure if it would make the same difference from RJ45s but I'm curious to find out. I am aware that the specs apply to both, but it doesn't look like a lot of electricians are aware of that...

Quite common to remove wallplates and find something like 4 inches of sheathing/cable jacket removed and pairs with more than an inch of untwisting before being punched into their IDC.

torbjrnfjeld
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Nice. Wish people were throwing money at me so I could get a certifier, but that's not the case. Will just have to be more mindful of this. Can you try comparing the pass through ends with the standard crimp ends with the same untwist? The idea of bare copper hanging out the ends makes me really leery of using them, but they would make it easier to push your twists in further. Would like to see if that bare copper does indeed cause any problems or whether it's fine. Thanks.

michaelsanders
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Does the poor cable termination impact adjacent connections in the rack? Crosstalk, etc.

flyingjeff
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Nice video. As an engineer who has been making a server rack doing my own patch cables and Keystone Jack connections it has concerned me untwisting the wires. For the Plugs I am using your Standard RJ45 Connectors. Just looked at one and it seems under 1/2 inch and more like 1/4 inch or just over 1/4. I would like to see this test with keystone Jacks. Also what happens in the chain if I have 4 keystone jacks compared to if I have 5 or 6 keystone jacks? Is the problem additive? For me real world I ran what leaves the Rack to a patch panel with a keystone jack because it looked cleaner but that means one more connection. I would like to see a cable chain with varying number of connection combinations and test to see performance. Thanks for video

kimlynch
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Good video sir ! Proper termination sure makes a difference :)

JasonsLabVideos
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Nicely done!!!
Could you please tell me what Ethernet instrument are you using to test those cables?
Greetings!

alro
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Does exists a Windows software for testing a network speed and shows the number of packets dropped?
I know that the standard PC's NIC is maximum 1 Gbps, but I'm more interested/curious about the # of dropped packets.

paolorosettani
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Very interesting! Thanks! BTW, your audio was not up to par.

rpsmith
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Damn, you built a studio and it is crap sound? Rebuild, re-mic. It's ironic that tech guys, whom It trust, BTW, dropped the ball on the most important aspect of video: sound.

johnashton
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Say it with me: "There is NO SUCH THING as 'ethernet' cable!!"

cyrylthewolf