Date: Wed, 15 Jul 2009 22:27:35 +0200 From: Michelle Konzack <bsd4michelle@tamay-dogan.net> To: freebsd-questions@freebsd.org Subject: Re: 5000' ethernet? Message-ID: <20090715202734.GH29667@tamay-dogan.net> In-Reply-To: <20090715194718.GA16401@Grumpy.DynDNS.org> References: <20090715194718.GA16401@Grumpy.DynDNS.org>
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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 ? I would say, NO chance with Ethernet... it is limited to 500 meters. > 100baseT uses lower power drivers than 10baseT, so perhaps 10baseT would > work better. There are inexpensive FiberOptic Transponder (I am using a bunch of it =66rom 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. > 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? 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... Thanks, Greetings and nice Day/Evening Michelle Konzack Systemadministrator Tamay Dogan Network Debian GNU/Linux Consultant --=20 Linux-User #280138 with the Linux Counter, http://counter.li.org/ ##################### Debian GNU/Linux Consultant ##################### <http://www.tamay-dogan.net/> Michelle Konzack <http://www.can4linux.org/> c/o Vertriebsp. KabelBW <http://www.flexray4linux.org/> Blumenstrasse 2 Jabber linux4michelle@jabber.ccc.de 77694 Kehl/Germany IRC #Debian (irc.icq.com) Tel. DE: +49 177 9351947 ICQ #328449886 Tel. FR: +33 6 61925193
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