Are you sure it’s not meant to be an RJ45 plug? The cylindrical thing to the bottom left corner of the wall socket looks like it might be a BNC plug. Which would make sense for the era of quake when Ethernet wasn’t yet ubiquitous.
> Which would make sense for the era of quake when Ethernet wasn’t yet ubiquitous.
Also token ring was just one of a few different network protocols that supported BNC. Technically you could run Ethernet 10base2 over BNC too (In fact I used to have network cards that supported this, though I only used them for 10baseT).
TR was definitely the more common protocol for BNC hardware though.
