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The original was posted on /r/homenetworking by /u/Qbccd on 2023-09-02 00:23:28+00:00.

I know this is a weird question, but I’m doing something non-standard where I want to pass signal between two RJ45 connectors that only have the two left-most positions occupied by wires, using an RJ45 inline coupler.

So if you try to picture that and think about how the wiring works in a straight-thru cable, then the inline coupler has to actually inverse the connection in order to maintain a straight-through cable.

In my case, because I only have 2 positions occupied, I want to make sure that they actually connect. I’m asking because I’m making the cable and I need to know how to terminate it. So is this the correct way to do it with an in-line coupler that is designed to maintain a straight-through connection:

Hope that wasn’t too confusing, thanks.

Edit: I think some people are misunderstanding what I mean, so I made another diagram to explain why I think the coupler has to reverse pins to maintain a straight-through cable: