On Mar 21, 15:24, Jim Strickland wrote: against same I don't really see how the fanout units on offer (or my unsuccessful back-to-back device) could do that -- the termination isn't in the transceiver or fanout unit, it's a resistor on the end of the cable. Anyway, it would still only be one termination domain. Or maybe I've misunderstood what you mean? If you mean my back-to-back transceiver idea, yes, if it had worked, you could use it to split a termination domain into two, just like a two-port repeater, or a very simple bridge (except a bridge usually separates collision domains too). -- Pete Peter Turnbull Dept. of Computer Science University of York