5000' ethernet?

Al Plant noc at hdk5.net
Wed Jul 15 20:15:46 UTC 2009

David Kelly wrote:
> Not directly FreeBSD related, but how much of a chance is there that two
> machines could communicate directly over 5,000 feet of cat5 with no
> special hardware?
> IIRC the classic ethernet problem limiting the distance between the
> farthest points on a network had to do with timing and collisions. If
> these two NICs are configured full duplex then it seems one would have
> no idea how far away the other was due to timing issues.
> 100baseT uses lower power drivers than 10baseT, so perhaps 10baseT would
> work better.
> In any case, have boxes of cat5 on order so as to find out myself.
> Are there any particular range extenders you have used and would
> recommend for making this task a sure thing on the first try? Perhaps I
> should put an inexpensive ethernet switch at each junction to serve as a
> regenerative repeater?

About a year ago we had to do this and the solution was a fiber optic 
cable between the PC's and  server room. Used 1000 Nic cards at each end.

~Al Plant - Honolulu, Hawaii -  Phone:  808-284-2740
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   < email: noc at hdk5.net >
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