I thought it was reasonably common knowledge if you had a phone jack with 4 wires, you could route data over those 4 pins in an ethernet plug too. Came in hand

I thought it was reasonably common knowledge if you had a phone jack with 4 wires, you could route data over those 4 pins in an ethernet plug too. Came in handy in an older house that used to have an intercom system, we just borrowed the deactivated intercom wires (they were 4 or 6 copper wires).