Allied Telesis made a "multi port tap" that provided four AUI ports off a single Ethernet tap. I don't know if it was a repeater/hub inside, or what. It was much smaller than a DELNI or DEREP.
That totally sounds like the one located in the Cray. My guess is most people would hook AUI transceivers but they just run ribbon cables to 4 boards then I think the 10base2 feeds into a BNC T plugged into it.
- Ethan
