Skip to content

Comment on Ethernet: The Basics

Comments

Is it just me, or are the pin numberings (not the order) wrong on their 568A/B pinouts? I’m having a hard time getting past that…

Yes. In 568B pin 1 would be Orange-Stripe (left side looking from top of plug). Very odd indeed. This pinout has been burned into my brain since high school - and I've never seen it represented backwards as their diagrams show. I even have the printed 802.3 spec from when I worked for a defense contractor a buddy of mine gave me as a gag gift. I've referenced it over the years more than expected.

But 568A and 568B are specifically color coded to the pins. And these diagrams are wrong.

Thanks for the confirmation. I spent way more time than I care to admit double checking this. I tend to not make my own cables anymore and just use punch down sockets, so it’s been a while.

AboutSource Built by g1lg1l

Hackerly is an independent reader for Hacker News, built on the public HN API. Not affiliated with Y Combinator.