There were thinnet repeaters which provided segment
isolation and regenerated
the signal onto other segments...
The DEC Delni comes to mind.
I've got a DECrepeater 90C. It has six coax connectors for linking
segments. I don't use it for anything, but I can't see throwing it
away. Someone may need one sometime.
--
Eric Dittman
dittman(a)dittman.net