Concerns over Cat6 install
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Posted by Brian on November 19, 2007, 5:21 am
Please log in for more thread options was looking for some advice on a cabling job we had completed in our office. Its cat6 (well they used cat6 faceplates and cable). I've posted an image at: http://allyoucanupload.webshots.com/v/2005729923302171893 Of about 30 points, 3 don't work at all (fail on even my cheap continuity tester). I'm guessing these have wires out at the back of the faceplates. The others allow connection over the network but having looked at how they've been terminated and from what I've seen before elsewhere it doesn't look good/right to me. We use a lot of high end IT equipment and I'm worried that giga-bit ethernet will not run over this. Would appreciate an opinion on how good/bad it looks from limited info I can give before I get them back and before I pay for whats been done. many thanks. | |||||||||||||||||||||||||||||||
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Posted by Carl Navarro on November 19, 2007, 7:01 am
Please log in for more thread options If you want somebody to say it looks like crap, I'll say it. It looks like crap. Ir still may pass certification. Since my Pentascanner can't certify Cat6 cable, I don't certify Cat6 installations as a rule. If I get asked to provide and certify 6, I have to borrow a different tester or install it without certifications. Just because I'm not certifying doesn't mean it wouldn't pass certification, because all cable is installed the same way and at least it will pass continuity. If you didn't specify certification in your bid, you have a problem. You can ask the original installers to certify, which they may be unable to, or you can get another vendor to certify, which will cost you more than if the first vendor does it. I guess the best thing you can do is sit down wih you vendor and express your concerns about the quality of the work and the inability to pass even a basic test. Give him a chance to make it right and then decide if you want to have it certified only after they pass basic testing. BTW the flat quote to certify 30 cables is 8 man hours. This would be to certify and repair any issues but pulling new cables. Materials are extra. Carl Navarro | |||||||||||||||||||||||||||||||
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Posted by Robert Redelmeier on November 19, 2007, 11:36 am
Please log in for more thread options > was looking for some advice on a cabling job we had completed in our office.
> Its cat6 (well they used cat6 faceplates and cable). I've posted an image > at: http://allyoucanupload.webshots.com/v/2005729923302171893 Ack! I see 'way too much untwist and looping. Pairs should be kept tightly twinned. Looks like an electrician job. > Of about 30 points, 3 don't work at all (fail on even my cheap continuity
> tester). I'm guessing these have wires out at the back of the faceplates. Possibly crossed the whites. > We use a lot of high end IT equipment and I'm worried that
> giga-bit ethernet will not run over this. Would appreciate an The shorter runs might still do gig. > opinion on how good/bad it looks from limited info I can give
> before I get them back and before I pay for whats been done. Where you have no-connect, you have an easily made case. For the rest, it might be a fight. IMHO, they all need proper retermination. -- Robert | |||||||||||||||||||||||||||||||
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Posted by CablingGuy on November 20, 2007, 3:07 am
Please log in for more thread options Brian skrev:
> Hi,
> was looking for some advice on a cabling job we had completed in our office. What was the specification given to the installer ? > Its cat6 (well they used cat6 faceplates and cable). I've posted an image
This job was not done by a cabling installer, or at least not someone
> at: http://allyoucanupload.webshots.com/v/2005729923302171893 > that have any idea how to do the job. > Of about 30 points, 3 don't work at all (fail on even my cheap continuity
> tester). If there is no specification, you should not expect all outlets to be functional. > I'm guessing these have wires out at the back of the faceplates.
> The others allow connection over the network but having looked at how > they've been terminated and from what I've seen before elsewhere it doesn't > look good/right to me. Correct this is very poor installation quality, but if you didn't specify the quality you want ! >
> We use a lot of high end IT equipment and I'm worried that giga-bit ethernet > will not run over this. I don't want to be rude, but if you use high quality equipment you should also have ordered high quality cabling system and installation. My best advice is to hire a new installer to rip out this and install a decent system that will meet your needs. I know this will be a pain now but will save you a lot of pain in the years to come. > Would appreciate an opinion on how good/bad it looks
This is bad.
> from limited info I can give before I get them back and before I pay for > whats been done. > Please ask the installer to see a copy of the suppliers installation instructions for each component. I am quite sure that he has neglected the instructions: - Pinching of the cable where the cable tie is attached ( pinched cables has to be swapped out) - Untwisting more than necessary (the pairs can not be "retwisted" cable has to be swapped out) - It seams that the wall box is not deep enough for the connector It might be cheaper for him to remove everything him self and not send you a invoice for the job. I guess that you live in the UK due to the outlet, you should know that the European/UK cabling standard (EN50173-1/-2) says that you can not expect that all outlets work, and there is no requirement to test installations of this size. You have a weak case if you don't go the route of suppliers instructions. -- The CablingGuy | |||||||||||||||||||||||||||||||
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Posted by Carl Navarro on November 21, 2007, 5:23 am
Please log in for more thread options wrote:
>Brian skrev:
>> thanks for all the advice.
>> The spec we gave was for a cat6 cabling installation and we were happy >> enough with the brand of panel/modules being used. I had (foolishly) assumed >> there were certain practices to be followed with this type of work - e.g >> amount of outer cover that can be removed etc. <<sni>>
>> Is its really the case in UK that we could be left with 10% of the sockets
>> not working at all, and still be expected to pay for the work? >
>The conformance clause says something like "this is based on a >statistical approach of performance modeling" that means that the >majority of outlets should work. Wow, I don't know how you work on either side of the pond, but if I do a job, I expect ALL jacks to work and pass certification if certificaion is required. My last 65 jack job had one cable that didn't pass NEXT on 7&8 on a voice cable and that exception was allowed. Everything else was tested until it passed. There was a spare cable pulled to the location of the failure, and I could have changed it out if it had been asked. If most of this installation was into the double gang shallow surface mount boxes pictured, I would have not liked handling Cat6 cable. Cat 5e 350 Mhz cable would have worked and the cable has less bulk and is easier to work with. There is still no excuse for the sloppiness of the job, but this is a job I would have only done out of hunger. Carl | |||||||||||||||||||||||||||||||
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>was looking for some advice on a cabling job we had completed in our office.
>Its cat6 (well they used cat6 faceplates and cable). I've posted an image
>at: http://allyoucanupload.webshots.com/v/2005729923302171893
>
>Of about 30 points, 3 don't work at all (fail on even my cheap continuity
>tester). I'm guessing these have wires out at the back of the faceplates.
>The others allow connection over the network but having looked at how
>they've been terminated and from what I've seen before elsewhere it doesn't
>look good/right to me.
>
>We use a lot of high end IT equipment and I'm worried that giga-bit ethernet
>will not run over this. Would appreciate an opinion on how good/bad it looks
>from limited info I can give before I get them back and before I pay for
>whats been done.