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OhMeadhbh 5 days ago

Right. RJ45 was sort of like an 8P8C, but had a thing on the side so you actually couldn't plug a "real" RJ45 cable into a "normal" 8P8C slot.

bigfatkitten 4 days ago | parent [-]

RJ45 specified the entire interface (ie which wires did what), not just the connector.

The “what” was of course not Ethernet.