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Re: [K12OSN] Gigabit on cat5 and even cat3!



A little googling says that the company has linux 2.5 drivers for this NIC.
Someone out there ready to try it? Maybe Wideband could donate 2 NICs for
eval purposes!

"Richard K. Ingalls" a écrit :

> Terrell Prude', Jr. wrote:
>
> > Actually, the Gig-E spec for twisted pair (IEEE 802.3ab) always has
> > specified Cat 5.  You are quite correct in saying that you don't need
> > Cat 5e.  However, there's no way you'll get it working across Cat 3 at
> > full Gig-E speeds, if at all.  You'd be lucky to get 20Mbps across it,
> > assuming it even works!  Even if it does somehow sync up across Cat 3,
> > you'll have so many CRC errors it's crazy; you're much better off
> > simply upgrading your cable plant, even given what it costs.  We've
> > had to do exactly that to a bunch of our schools, 'cause even
> > 100BaseTX just will not work across Cat 3 (100BaseT4 will, but nobody
> > makes those anymore).
> >
> > If someone's figured out how to actually pull off Gig-E across *Cat
> > 3*, then it's totally nonstandard and violates every IEEE spec that
> > exists. You actually *saw* this running on Cat 3 at *full* 1Gbps?  If
> > so, what were they using for a data xfer demonstration?  A FTP
> > session?  A Windows "drag 'n' drop" file copy?  Pardon me if I seem a
> > bit cynical, but I just have a very hard time believing IEEE 802.3ab
> > Gig-E on Cat 3 of *any* cable length.
>
> I know.  I found it hard to believe too.  But they did drag and drop
> from memory to memory (to eliminate the hard drive speeds from the
> equation).  I'm not a spokesperson for the company so I'm not going to
> go into any more detail.  You can email them or call or visit their
> website.  I was just impressed and wanted to share what I saw.
>
> WideBand Corporation,
> 401 W. Grand, Gallatin,
> MO 64640,
> phone: (660) 663-3000,
> fax: (660) 663-3736;
> web: www.wband.com
>
> >
> >
> > --TP
> >
> > Richard K. Ingalls wrote:
> >
> >> Just wanted to share:
> >>
> >> I learned at the International Academy of Science last week that
> >> there is a company that makes NICs and Switches that allow 100%
> >> Gigabit Ethernet speeds on existing cat5 & cat3 cables (not just
> >> cat5e).  That means we can upgrade to Gigabit backbones without
> >> rewiring!  Just buy new switches and new NICs for the servers and
> >> you're done.  Very cool!  I couldn't believe it when I saw them plug
> >> in cat3 cables and make it run at Gigabit speed (100%)!!!!!  Whoa.
> >>
> >> I thought that I ought to become a reseller of these things.  I
> >> haven't, of course, cuz' I make so much money as a tech. coord. at my
> >> small rural school (LOL) - I don't need another job.  I definately
> >> wouldn't have the time for it.
> >>
> >> Anyway, for those of you running K12LTSP and using or thinking about
> >> using Gigabit - you don't have to spend $250.000 on rewiring!  The
> >> company is called wideband (i think: www.wband.com).
> >>
> >
>
> --
> ===========================================================
> Richard K. Ingalls
> Technology Coordinator
> Glenwood R-8 School
> awm002 mail connect more net
> (417) 256-4849
>
> "According to my calculations, the problem doesn't exist."
> ===========================================================
>
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