this post was submitted on 22 Jul 2025
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Are CAT6 RJ45s supposed to be physically different from their CAT5 counterparts? I've bought some CAT6 RJ45s to match my cables and feel like I'm hallucinating because they don't fit into the Ethernet port. I've looked around in local tech stores, bought online and see all the CAT6 RJ45s are the same everywhere else, but when I use a CAT5 RJ45 it actually fits into the Ethernet port in literally anywhere. Crimping is suddenly exponentially harder with CAT6 RJ45s too for some reason too and after years of practicing crimping I feel like it's a skill issue at this point. I even searched up just to be sure but while answers say they're the same my eyes and fingers are feeling the difference. What's going on? What am I doing wrong? I'm now doubting whether CAT6 RJ45s are even supposed to fit in my Ethernet ports at home.

Update: The answer really was the crimper all along... until I get a CAT6 crimper I guess I'll just crimp harder for now - now everything fits, 1 year and 2000 jacks later, how embarrassing...

Thanks very much, everyone!

Post-update: So the cable worked at 3am... only to crap out at 10am - apparently both my test cables are bad in the same wires (3-6) because as the ISP service guy says, "it could've broken on the inside since the shielding's so soft". They rewired everything and now everything's fine, I guess...

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[–] LazerDickMcCheese@sh.itjust.works 2 points 1 week ago (3 children)

They should be fitting...can I get a visual for what you're talking about?

[–] velummortis@lemmy.dbzer0.com 2 points 1 week ago (1 children)

Sorry this took so long, apparently nobody likes an HEIC...

The CAT6 I crimped is on the left, the CAT5 is the ISP's work.

[–] PancakesCantKillMe@lemmy.world 4 points 1 week ago (1 children)

Side note on Apple’s heic images. You are right, they are difficult to manage. I took a holiday and discovered all my images (1500-2000) were orphaned on my phone by Windows. After learning why, I refused to pay MS the $1 for the codec. As it turns out, Linux can handle them with some tools. A small script converted them all to jpg and that was that. I’ve since changed the setting on my phone to jpg. Heic is a pain in the butt to me and isn’t worth whatever gains claimed. Linux can help, but newer versions of the phone OS require newer versions of the heic/heif toolsets since the format is still evolving. Apparently. JPEGs it is then.

[–] velummortis@lemmy.dbzer0.com 3 points 1 week ago

That $1 is diabolical, especially when there was a separate MS Store link giving it for free anyways... I don't even know why I enabled the HEIC storage, no app will accept it when I upload (used GIMP to export JPG) - disabling!

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