On Sun, 15 Jun 2008, Eben King wrote:
>> From Wayne Pollock:
>
> ---------- Forwarded message ----------
>
> When adding connectors you must not untwist more than
> 1/2 inch of cable at each end, and strip no more than
> 1 inch of insulation. Note that even one inch of
> untwisted wires can reduce throughput to less than
> 30 Mbps! Each coupler you use requires two additional
> connectors, with about 1/2" untwisted cable per
> connector. Your 100MB network might be reduced to
> around 15 Mbps with four connectors (1 coupler plus
> the two ends). Don't even think about using 2 couplers!
I found a source for long cables, so it's moot.
> The couplers themselves are straight through wires, and
> I've never seen one rated higher than 10 Mbps.
Would wrapping them in Al foil help? My electrical intuition says the Al
shied would emulate a Faraday chamber, so it should.
> Finally, while it is possible to violate standards by
> using longer cables, the 100 meter limit per segment
> still applies. It takes time for electricity to
> propagate through a wire, and Ethernet devices will
> only wait so long before assuming the segment isn't
> in use and begin transmission of their own. Remember
> you're using a shared media with Ethernet, so a too
> long segment will result in intermittent dropped
> packets. (Of course using full duplex, switched
> Ethernet may mitigate that and allow longer segments.)
No sweat, the link is ~25 feet.
-- -eben QebWenE01R@vTerYizUonI.nOetP royalty.mine.nu:81Q: What kind of modem did Jimi Hendrix use? A: A purple Hayes. ----------------------------------------------------------------------- This list is provided as an unmoderated internet service by Networked Knowledge Systems (NKS). Views and opinions expressed in messages posted are those of the author and do not necessarily reflect the official policy or position of NKS or any of its employees.
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