Our company have all the networking with cat 5 cables. My problem is: one of our employees bought a cat 6 cable but we don't have any rj 45 for this cable, we only have for the cat 5. I tried so many times to insert it on the rj45 but always the last color(brown) doensn't fit, we use the T-568A. There's a way to fit it? It's almost fitting but when I managed to get all of them the last one doesnt fit.

Thank you in advance

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    – Ron Maupin
    Dec 23, 2021 at 21:12

1 Answer 1


That doesn't make too much sense. Mechanically, there's no difference between 8P8C aka RJ45 connectors for Cat 6 or Cat 5.

[edit after comments] You might refer to terminate cabling - in that case, make sure that cables and panels/jacks match the same specifications. If they don't you can't do a clean job and may very likely produce unusable connections. You should consider hiring a professional for cable deployment. Also, make sure that your cabling gets certified properly. Makeshift terminations won't do.

  • That's true, but usually when you try to plug the rj45 for the cat 6 you need a support, right? I mean like a "guide" to insert the cable and then insert on the plug. So, it's it possible to crimp it? Aug 25, 2021 at 14:11
  • There's a white tube that separates each string of the cable, so when I try to organize the cables and plug it, this white tube disturbs me Aug 25, 2021 at 14:13
  • He's talking about terminating a cat6 cable. Yes, cat6 wires may be a bit bigger than old cat5, so it might take a few tried to get the wire into the crimp. Try different crimps. That "tube" is pair alignment guide; cut it off.
    – Ricky
    Aug 25, 2021 at 19:41

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