10base-T1S and 10base-T1L are single pair. Though I didn’t realise they’re a modern standard until I just looked it up. Coax is also two ”wires”, though obviou

10base-T1S and 10base-T1L are single pair. Though I didn’t realise they’re a modern standard until I just looked it up. Coax is also two ”wires”, though obviously not twisted. I used to do networking professionally too. Though it looks like I’ve gotten rather rusty on the basics.