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Automation, Cinema, Computers, Television Forum
Network Cable Length?
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<blockquote data-quote="ProDave" data-source="post: 392668" data-attributes="member: 6969"><p>Okay I did this job today.</p><p></p><p>It got delayed by other stuff, holdays etc.</p><p></p><p>I bought a 305M drum of copper cat5e outside cable from ebay for £60</p><p></p><p>Pacing it out again, I think the run was about 120 metres in total.</p><p></p><p>Connected it up, plugged the computer in, nothing, squat, "no network connected". ******.</p><p></p><p>I then spent an hour chasing the problem, and found no problem.</p><p></p><p>I belled out the pairs end to end individually. Each pair has a resistance of 13.9 ohms, all identical (if someone cares to look up the resistance per metre of cat5e we can work out the actual length from that)</p><p></p><p>Plugged it back in again and started playing with windoze 8 network diagnostics (customers laptop) First time I have seen windoze 8, hopefully the last time as well.</p><p></p><p>Now it got puzzling here. I couldn't find anything "wrong" except it said "no network connected". Oh hang on it briefly said "network connected" then "not connected again". What's going on?</p><p></p><p>The longer I left it, the more it stayed on "network connected" until after 20 minutes or so it was connected all the time.</p><p></p><p>So I left it "working" but all a bit unsatisfactory. I don't know if it's going to come back and bite me or just carry on now. Does a network connection "learn" and adjust over time to a poor connection?</p></blockquote><p></p>
[QUOTE="ProDave, post: 392668, member: 6969"] Okay I did this job today. It got delayed by other stuff, holdays etc. I bought a 305M drum of copper cat5e outside cable from ebay for £60 Pacing it out again, I think the run was about 120 metres in total. Connected it up, plugged the computer in, nothing, squat, "no network connected". ******. I then spent an hour chasing the problem, and found no problem. I belled out the pairs end to end individually. Each pair has a resistance of 13.9 ohms, all identical (if someone cares to look up the resistance per metre of cat5e we can work out the actual length from that) Plugged it back in again and started playing with windoze 8 network diagnostics (customers laptop) First time I have seen windoze 8, hopefully the last time as well. Now it got puzzling here. I couldn't find anything "wrong" except it said "no network connected". Oh hang on it briefly said "network connected" then "not connected again". What's going on? The longer I left it, the more it stayed on "network connected" until after 20 minutes or so it was connected all the time. So I left it "working" but all a bit unsatisfactory. I don't know if it's going to come back and bite me or just carry on now. Does a network connection "learn" and adjust over time to a poor connection? [/QUOTE]
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