Jump to content

Ethernet Twists

mcmxcii
By mcmxcii
in Networking
 Share
Posted

I read that the twisting of the wires inside an Ethernet Cable is important, one place saying "Transmitting Ethernet signals over a cable that small would not be possible without them." However I just bought an Ethernet Cable C.A.T 6 E (40 meters long), and when attaching the RJ45s I saw that my wires where not twisted. I was just wondering if it is so important, why mine aren't twisted and how this will affect anything? Do I need to buy a new cable or is it not important?

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/
Share on other sites
Link to post
Share on other sites
Posted

In every cable I have always made, the pairs are twisted together and not the four pairs twisted together if that makes sense. 

                                                                                                                                                      

CPU: Intel I7-4790k | MOBO: Asus Sabertooth Z97 Mark 1 | Ram: Corsair Vengance 32GB 1600hz | GPU: EVGA GTX980 Reference

PSU: Corsair EVGA G2 850W  | SSD: Intel 730 Series 480GB, Kingston SSDNow V300 120GB | HDD: WD Black 1TB

 CPU Cooler: Corsair H105 | Case: Corsair 760T (White) | Peripherals: (2)Asus VS247H-P, Corsair M65, Corsair K70 RGB w/ Brown Switches

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2518820
Share on other sites
Link to post
Share on other sites
Posted

Twisting the wires is supposed to prevent crosstalk between the cables. They're untwisted at the ends though.

This is correct, they won't be twisted for like .5 inch at the ends of the cable though, because it needs to fit inside the connector.

CPU: i7 3770k @ 4.8Ghz Motherboard: Sabertooth Z77 RAM: 16GB Corsair Vengeance GPU: GTX 780 Case: Corsair 540 Air Storage: 2x Intel 520 SSD Raid 0 PSU: Corsair AX850 Display(s): 1x 27" Samsung Monitor 3x 24" Asus Monitors Cooling: Swifttech H220 Keyboard: Logitech 710+ Mouse: Logitech G500 Headphones: Sennheiser HD 558 --- Internet: http://linustechtips.com/main/uploads/gallery/album_1107/gallery_12431_1107_23677.png My Setup:  http://linustechtips.com/main/gallery/image/7922-1-rkcf7io/ -- NAS: 3x WD Red 3TB Drives (RAIDZ-1), 5x 750gb Seagate ES HDD(RAIDZ-1), 120gb SSD for caching, OS: FreeNAS --  Server 1: Xeon E3 1275v2, 32GB of RAM, OS: ESXi 5.5 -- Server 2: Xeon E3 1220v2, 32GB of RAM, OS: ESXi 5.5

 

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2518855
Share on other sites
Link to post
Share on other sites
Posted
  • Author

This is correct, they won't be twisted for like .5 inch at the ends of the cable though, because it needs to fit inside the connector.

I cut a good 3-4inches off and they were still not twisted.

 

Cat 6E is not a standard. So it could literally be anything \: Normal the pairs are twisted then there is a + in the cable with a pair on each side and the + rotates through out the cable that twists the pairs with each other too.

 

Like this

 

Cable_Utp_4_Pare_4e171ec7e7b99.jpg

Yeah, my pairs where not twisted. and the packageing said 6 e on, but i am sure when i bought iit, it said cat 6

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2518936
Share on other sites
Link to post
Share on other sites
Posted

How will crosstalk effect my experience?

It will cause more errors and packets to collide. This will reduce the overall throughput of the cable.

CPU: i7 3770k @ 4.8Ghz Motherboard: Sabertooth Z77 RAM: 16GB Corsair Vengeance GPU: GTX 780 Case: Corsair 540 Air Storage: 2x Intel 520 SSD Raid 0 PSU: Corsair AX850 Display(s): 1x 27" Samsung Monitor 3x 24" Asus Monitors Cooling: Swifttech H220 Keyboard: Logitech 710+ Mouse: Logitech G500 Headphones: Sennheiser HD 558 --- Internet: http://linustechtips.com/main/uploads/gallery/album_1107/gallery_12431_1107_23677.png My Setup:  http://linustechtips.com/main/gallery/image/7922-1-rkcf7io/ -- NAS: 3x WD Red 3TB Drives (RAIDZ-1), 5x 750gb Seagate ES HDD(RAIDZ-1), 120gb SSD for caching, OS: FreeNAS --  Server 1: Xeon E3 1275v2, 32GB of RAM, OS: ESXi 5.5 -- Server 2: Xeon E3 1220v2, 32GB of RAM, OS: ESXi 5.5

 

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2519222
Share on other sites
Link to post
Share on other sites
Posted

Speed or stability?

Ethernet will pretty much always sacrifice speed for stability. If there is a lot of cross-talk speed will suffer first and if its really bad stability will suffer.

CPU: i7 3770k @ 4.8Ghz Motherboard: Sabertooth Z77 RAM: 16GB Corsair Vengeance GPU: GTX 780 Case: Corsair 540 Air Storage: 2x Intel 520 SSD Raid 0 PSU: Corsair AX850 Display(s): 1x 27" Samsung Monitor 3x 24" Asus Monitors Cooling: Swifttech H220 Keyboard: Logitech 710+ Mouse: Logitech G500 Headphones: Sennheiser HD 558 --- Internet: http://linustechtips.com/main/uploads/gallery/album_1107/gallery_12431_1107_23677.png My Setup:  http://linustechtips.com/main/gallery/image/7922-1-rkcf7io/ -- NAS: 3x WD Red 3TB Drives (RAIDZ-1), 5x 750gb Seagate ES HDD(RAIDZ-1), 120gb SSD for caching, OS: FreeNAS --  Server 1: Xeon E3 1275v2, 32GB of RAM, OS: ESXi 5.5 -- Server 2: Xeon E3 1220v2, 32GB of RAM, OS: ESXi 5.5

 

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2519783
Share on other sites
Link to post
Share on other sites
Posted

How will crosstalk effect my experience?

Packet loss and data corruption. But that's mostly if the entire cable is untwisted. Chances are that it is. It's just the ends that aren't supposed to be so you can shove them in to the plug.

.

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2521470
Share on other sites
Link to post
Share on other sites
Posted
  • Author

Packet loss and data corruption. But that's mostly if the entire cable is untwisted. Chances are that it is. It's just the ends that aren't supposed to be so you can shove them in to the plug.

Maybe, there was some room at the end where they were not twisted.

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2523152
Share on other sites
Link to post
Share on other sites
Posted
  • Author

Ethernet will pretty much always sacrifice speed for stability. If there is a lot of cross-talk speed will suffer first and if its really bad stability will suffer.

I ran a test and i am getting good speeds, so i guess i'll just have to use it for a while to see about stability.

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2523159
Share on other sites
Link to post
Share on other sites
Posted

My last cable was twisted at the ends. thought that already had the plugs on,

Its not possible to have a cable twisted all the way to the ends. Part of the cable has to inside the pins. Realistically your talking about ~2-4 centimeters that are not twisted 

                                                                                                                                                      

CPU: Intel I7-4790k | MOBO: Asus Sabertooth Z97 Mark 1 | Ram: Corsair Vengance 32GB 1600hz | GPU: EVGA GTX980 Reference

PSU: Corsair EVGA G2 850W  | SSD: Intel 730 Series 480GB, Kingston SSDNow V300 120GB | HDD: WD Black 1TB

 CPU Cooler: Corsair H105 | Case: Corsair 760T (White) | Peripherals: (2)Asus VS247H-P, Corsair M65, Corsair K70 RGB w/ Brown Switches

Link to comment
https://linustechtips.com/topic/187204-ethernet-twists/#findComment-2523235
Share on other sites
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing Networking

×