Date: Wed, 15 Jul 2009 16:07:52 -0500 From: David Kelly <dkelly@hiwaay.net> To: Michelle Konzack <bsd4michelle@tamay-dogan.net> Cc: freebsd-questions@freebsd.org Subject: Re: 5000' ethernet? Message-ID: <20090715210752.GE16489@Grumpy.DynDNS.org> In-Reply-To: <20090715202734.GH29667@tamay-dogan.net> References: <20090715194718.GA16401@Grumpy.DynDNS.org> <20090715202734.GH29667@tamay-dogan.net>
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On Wed, Jul 15, 2009 at 10:27:35PM +0200, Michelle Konzack wrote: > Hello David, > > Am 2009-07-15 14:47:18, schrieb David Kelly: > > 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? > > I do not know hoe much a feet is in meters but AFAIK arround 0,3 which > mean, you are talking about 1.5km or 1 mile ? Yes, roughly a mile which is 5280 feet. Maybe less, but no more than a mile. Won't really know until I get there and start running cable. > There are inexpensive FiberOptic Transponder (I am using a bunch of > it from Transmode for my CWDM 1GE and DWDM 10GE network) > > The 100 Mbit Transponder cost arround 600 Euro (each) and for > your 5000 feets you need only an inexpensive FiberOptic cable. > EVEN the cheapes one would transfer 1 Gbit at this distance. What I'm not (yet) seeing is a fiber optic transceiver listed with matching fiber optic cable. The transceivers seem inexpensive vs the cost of the cable. > > 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? > > You have to use at least 3 Repeaters which NEED electricity. Do you > know this? Yes, of course. > 5000 feet CAT5, 3 Repeater plus electric installation cost more, > then the FiberOptic Cable with two Transponder. And of course, no > one can sniff traffic on FiberOptic and you have no worry about > magnetic fields disturbing your 5000 feet... No one is going to sniff *this* one. Am not finding sources of fiber optic cable as easily as I can find fiber optic transceivers. 100baseT ethernet switches are about $25 each if one will serve as a regenerative repeater. Did I mention this is a temporary installation? -- David Kelly N4HHE, dkelly@HiWAAY.net ======================================================================== Whom computers would destroy, they must first drive mad.
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