Back in the early '90s I used some network that ran over CAT-3 copper, and they had some sort of time slot so there were no collisions. I wish I could remember

Back in the early '90s I used some network that ran over CAT-3 copper, and they had some sort of time slot so there were no collisions. I wish I could remember the name. Our Netware admin swore by it, because no collisions! IIRC, the throughput was 200kbps. It was, basically unusuable. We eventually switched our development network (8 machines) and customer network (25 machines) over to 10-base-2 Ethernet, and it was blazing in comparison. The Netware guy was sure it would be terrible because of the collisions. This memo reminds me a bit of that: in theory the other network was better, but in the real world Ethernet worked pretty well.