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Hi Rob, You are quite right in stating that the official limit is 100 meters. The biggest run I have installed is about 90 meters, house to shed, and it works fine at 100 mbit, with mains-powered switches both ends. Sorry, no experience of POE systems. I think you are worrying unnecessarily as to whether fibre could be used. My experience of these things is that the cores themselves are fairly fragile, but protected by a tough-as-old-boots sheathing system. Get the glanding right, and you shouldn't have a problem. Biggest problem is to decide on methacrylate fibre (pro=easy termination, con=lossy) or a plastic-clad silica fibre (pro=less lossy, con=more fiddly termination). Happy experimenting! Regards etc, Ray. >----Original Message---- >From: rob@xxxxxxxxxxxxxxx >Date: 21/01/2014 16:51 >To: <list@xxxxxxxxxxxxx> >Subj: [LUG] Ethernet over 100 metres > >Hi folks, > >We're looking at running an Ethernet to link two buildings which are >quite a distance apart (around 220 metres, possibly around 230 metres >maybe). > >Now I understand that the official limit on length of CAT5 is 100 >metres, however I'm wondering if anyone has pushed the length any further? > >The thought I had was to run CAT5 to a waterproof box just under half >way, in there have a 10/100 switch powered by POE, and run the rest of >the cable to the other location (this might be about 130 metres). I'm >not sure if putting another switch on the cable run (again POE powered) >would be an option due to it being outside (it could be tampered with, >or eaten by a horse). > >Other than Ethernet (and wireless which probably won't work due to line >of sight issues), what other options might we have? > >I've even considered 10Base2 coax cabling (is it still available?) or >Thick Ethernet? (only ever seen that once at school back in the 90s, >again is that still available? Can it go faster than 10Mbit?) Or... >okay, maybe I'm verging on crazy now... Token ring? > >Fibre was considered but I'm not sure if it would be too fragile to run. > >I think ideally it would be nice to have 100mbit, but we could probably >get away with 10 or 20Mbit/sec. > >Rob > > >-- >The Mailing List for the Devon & Cornwall LUG >http://mailman.dclug.org.uk/listinfo/list>FAQ: http://www.dcglug.org.uk/listfaq > -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq