Greg MacLellan wrote in a message to All:
 GM> just a couple questions about ArcNet..
Keep in mind that the answers for ARCnet are very different than for 
hernet.
 GM> according to a sheet that came with a PureData PDI515 card i
 GM> have, i can run up to 100ft of cable to a passive hub. I
 GM> have a passive hub here, so thats fine for me.
 GM> Now, i'll be running 3 systems for the moment, does that
 GM> mean that the 4th unused port on the passive hub needs a
 GM> terminator?
Ordinarily yes, although many passive hubs were autoterminating.
 GM> Also, is it possible to use two passive hubs, or do i need
 GM> to get an active hub? (in which case i'll switch to a
 GM> bus-topology as its cheaper just to buy t's than it is to
 GM> buy an active hub).
Yes, you can have multiple hubs.  Signal loss is the limiting factor.  The 
only advantage to using hubs in ARCnet is that it makes it easier to run the 
wires.  If the physical arrangement of your nodes allows it, a bus is fine.
 GM> is that possible to do? will two work together like that?
 GM> will it degrade preformance?
The physical topology has no effect on ARCnet performance, because ARCnet 
uses a token bus time slot allocation scheme.
 
-- Mike
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