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Sparky tried to do CAT5 repair!

Discussion in 'Electrics UK' started by m0bov, 7 Feb 2018.

  1. m0bov

    m0bov

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    Got asked to look at a slow internet connection, found a join in an out building.

    https://photos.app.goo.gl/gLDb9GQScxrIsy1s1

    I guess this is reason why the PC would only run at 10Mbps!

    Got an IDC CAT6 box to punch down and re join the cables.
     
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  3. Nozzle

    Nozzle

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    It totally amazes me that phone lines and IDCs even work! They're so.... agricultural?

    Nozzle
     
  4. m0bov

    m0bov

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    Its not a phone line though :rolleyes:
     
  5. Nozzle

    Nozzle

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    It's the same twisted pair, solid copper tech.

    Nozzle
     
  6. yorkspark

    yorkspark

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    the jellies are effectively an idc joint though, can't see how fitting an idc punchdown joint would improve it, did the line speed improve much?
     
  7. m0bov

    m0bov

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    Its only running at 10Mbs, just. I offered to come back with a CAt6 box and punch it down. all I can do, only other option is for them to get another long run of cable down the garden.
     
  8. yorkspark

    yorkspark

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    hows it all connected up? is that cat5e a 4pair ethernet from the router or a pair supplying the line to a router/pc?
     
  9. Adam_151

    Adam_151

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    Not sure the problem is so much the jellies, but rather the large amount of each pair thats been untwisted to go the joint and then all the unpaired conductors from all the pairs are then all tangled around one another. I reckon if you only had jellies and you needed to get a joint done, you could do something that worked almost as well as the proper connector
     
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  11. m0bov

    m0bov

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    Its a feed coming from a virgin router to another router in an office. It was damaged but the wrong length was used hence the previous effort of joining it.
     
  12. m0bov

    m0bov

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    I'm tempted to try and re twist the wires, I normally put a RJ45 on each end and then a double female adapter but its in the corner of a garage and not easy to get to.
     
  13. You won't be able to repair that with a joint. You'd need to terminate into an RJ45 connector, and then put both end in a router, but if there's no power supply, the router won't work. You'll find you need to rerun a new cable I'm afraid.
     
  14. yorkspark

    yorkspark

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    i cant see the joint been responsible for a slow line, the speed drop would be negligible if any at all, has it been wiremapped? whats the speed at the 1st router?
     
  15. Cat 5 isn't designed to be jointed; the wires are twisted to reduce crosstalk and interference, and those wires are going all over the place, and very likely introducing noise and crosstalk in the other pairs. The joints themselves will actually slow the line speed down as well.
     
  16. m0bov

    m0bov

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    Sorry, meant to add, its not an ADSL feed, its just a data link between to routers/switches. When a pop a laptop on the end it tries to connect at a gig, then 100 and finally 10.
     
  17. Sorry, I should have said switch earlier, not router - it's been quite a few years since I've done this. It keeps dropping down because the line can't handle the speed. If you want to prove the problem, and you have a spare bit of cable, then lose lay it between the two ends, and see if the speed improves.
     
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