Net CAT6 cable made, not getting gigabit speed

[gsxrjunky]

I bought 1000 feet of CAT6 cable a few years ago and when I make new cables now (under 10 feet in length), I cannot get gigabit speeds over the line. I am using RJ45 plugs (8P8C modular) and T-568B color code. My network tester shows all eight pins going across with no crossovers. I am testing the gigabit speed two ways: status speeds on the adapter GUI in Windows and secondly on the LED lights from my Keebox SGE05 unmanaged Gigabit Switch. I can rule out issues with the adapter and the switch from using other cables (store bought) and reaching gigabit speeds. I'm not sure why, but for some reason, I can only reach 100Mbps with this cable! Please help!

 

[kanewolf]

Untwisting too much? CCA cable? Bad crimp tool. There are lots of possible reasons.

 

[gsxrjunky]

Untwisting too much? CCA cable? Bad crimp tool. There are lots of possible reasons.

Only cutting about an inch off both sides and the cable sheath goes about half way into the plug. I thought the crimping tool might be an issue, but my cable tester shows all eight pins have throughput. It's also not CCA cable. This box is UL compliant.

 

[bill001g]

Your only realistic option is to keep cutting off and reterminating. Since it runs at 100m it means that the orange and green pairs are fine but either the blue or brown has a issue. The cheap meters only test simply continuity they do not show if the connection might be just good enough to pass a power level but not actual data. The meters that can test it start in the $1000 range and go over the price of a small car.

If it keeps happening I would be 100% sure you really have the wire pattern correct. Look at a commercial cable as a example.

It is one of those skills you only learn though lots of practice.

 

[gsxrjunky]

Your only realistic option is to keep cutting off and reterminating. Since it runs at 100m it means that the orange and green pairs are fine but either the blue or brown has a issue. The cheap meters only test simply continuity they do not show if the connection might be just good enough to pass a power level but not actual data. The meters that can test it start in the $1000 range and go over the price of a small car.

If it keeps happening I would be 100% sure you really have the wire pattern correct. Look at a commercial cable as a example.

It is one of those skills you only learn though lots of practice.

Thanks for the reply Bill. I have definitely cut and re-plugged a few times on different cables to be sure. There have been other cables cut with the same batch of cable that pass gigabit just fine, which of course leads me to believe that I'm messing something up, but I've tried six or seven different times (on each end) and keep getting the same results :/

 

[bill001g]

Other than having the wrong ends...ie stranded vs solid there is not a lot that can be wrong. Maybe cut the end off a commercial cable and see if you can put a end on that successfully.

Not sure what to suggest there is not a lot too this. Only other thing I have ever seen is wire that is too thin. It must be between awg 22-24. You see awg 26 or higher wire but none of that meets the actual tia/eia standards.

 

[frank_hnd]

dumb question, but have you made sure your network card support 1000mbps connections?

you can watch this video how to make the cat6 cable terminations: https://www.youtube.com/watch?v=5m-0w3gar_I

Cat5e and Cat6 standards require no more than 1/2 inch (1.27 centimeters) of untwisted cable in the mod plug when you terminate it; keep that in mind as you trim the cable before inserting into the mod plug. Also, be sure you're using real Cat6 certified mod plugs and cabling; there is a big difference in the Cat5e and Cat6 hardware.

 

[jsmithepa]

Post a close-up pix of both RJ45 side-by-side, on the "paw" side so I can see all 6 wires and their colors.