Also how do I tell whether this keystone jack is t658a or t658b? I've already wired the other end to a rj45 plug as t568a
That jack is labelled as B, but feel free to wire it as per A if you like.
Why did you choose A for the other end, out of interest?
No idea! I have usually done B. I figured as much so swapped the green and yellow and it works.
@ectoplasmosis started
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Also how do I tell whether this keystone jack is t658a or t658b? I've already wired the other end to a rj45 plug as t568a