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61 posts

Master Geek
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# 248765 9-Apr-2019 09:59
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Morning all, currently doing extensive renovations and setting up a star configuration home network using a unifi poe switch as a hub.
Five points, three with a standard socket/wallplate, 2 with crimped RJ45 plugs to go into the back of unifi inwall APs.

Set up the switch and APs and are all good.

Initially the two crimped cables weren't working, one would provide power but no data, the other just had nothing. So I tested the APs on the sockets, two were good and one only provided power.

Got the electricians back to fix it, they went over everything and realised they'd messed some of it up. They redid it, tested it and said they were all up. Got home and plugged things in, the 3rd socket that had only provided power was now also working properly but the two crimped cables are still only providing power.

Electricians are going to look at it again but thought I'd try to get some insight in case we're missing something. Could there be a difference in the configuration between the sockets and the crimped plugs? Thought cable length might be an issue but none of them are particularly long and the socket that is now working is probably longer than one of the ones that isn't.

Any help would be much appreciated

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mdf

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  # 2213419 9-Apr-2019 10:38
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Can you post photos of each end of the connection, showing the order the wires are connected to the pins?




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Master Geek
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  # 2213420 9-Apr-2019 10:39
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Will do once I'm home

 
 
 
 


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  # 2213422 9-Apr-2019 10:55
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You need to avoid electricians. I had one recently where things didn't work and had been cable tested supposedly. I went onsite and looked at the terminations - apparently both ends should simply be terminated the same (any made up order apparently doesn't matter as long as both ends match). If you looked at that this persons company web site they were an expert with both copper and fibre.




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Master Geek
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  # 2213736 9-Apr-2019 17:15
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Click to see full size

 

Click to see full size

 

Click to see full size

 

Click to see full size

 

 

 

Here's the 4 crimped ends, as you can see in one in particular at the switch end it's pretty messy, the other isn't great either. Sorry about the poor photos, from what I can tell they're all crimped in a type B configuration but correct me if i'm wrong.


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  # 2213739 9-Apr-2019 17:22
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yuck

 

you should be able to crimp them while keeping the outer sheath inside the connector, ie only strip it back a little

 

just goes to show they only barely know what they are doing


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  # 2213759 9-Apr-2019 18:26
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Get someone who actually knows what they are doing - the level of workmanship is very poor from those photos. The strain relief crimp at the back of the plug won't be working due to so much sheath being removed. Probably also using stranded connectors on solid cable which will be pretty unreliable.


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  # 2213760 9-Apr-2019 18:26
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Hard to believe anyone could produce such poor workpersonship. Beyond bad.


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Ultimate Geek
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  # 2213797 9-Apr-2019 18:33
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These photos make me feel really good about my abilities.

 

 

It may take me 10 minutes to do the first connector and a few minutes for subsequent ones, but at least they are something close to specifications compliant. I'm concerned if an electrician did this. If they think this is remotely acceptable, what are they hiding in people's walls?

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  # 2213799 9-Apr-2019 18:39
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Spyware:

 

Hard to believe anyone could produce such poor workpersonship. Beyond bad.

 

 

no its pretty easy when there is no regulation for that kind of work

 

anyone can do it and call them selves a data cable installer


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  # 2213805 9-Apr-2019 18:48
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That's one of the worst crimping jobs I've ever seen - and I've seen some bad jobs..The top one even looks to have white electrical tape in it? Is it actually cat6 cable they've used? Because if it is they've also used cat5 connectors.

 

Tell them there work is totally unacceptable and you either want somebody who's certified for data installs or will be forwarding them the bill of a professional data installer to come and fix their terrible work.

 

 


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  # 2213808 9-Apr-2019 18:54
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I am no expert, but that work looks poor.  They couldn't even be bothered trimming the wires to the correct length so that the insulation is crimped in the plug.  As someone else said, I wouldn't trust most electricians with data cabling.  Maybe network cabling should have larger gauge wires and screw terminals :)


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Ultimate Geek
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  # 2213837 9-Apr-2019 19:35
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W.T.F IS THAT?

 

Firstly it looks like orange pair is damaged and that is one of the data pairs.

 

 

I wouldnt even bother getting the sparkys back, they are obviously have no idea what they are doing!

 

 


mdf

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  # 2213851 9-Apr-2019 20:00
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Crimping plugs is more fiddly than punching down jacks. I suspect that one or more of the individual strands hasn't got a good connection at one or both ends which is causing your data issues on the plugs.

As others have suggested, a data professional to terminate the connectors properly is the answer. I'd suggest it would probably be prudent for him/her to have a look at the jacks too, even though those seem to be working for now.

Whereabouts in the country are you? Likely someone can suggest someone reputable.

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  # 2213887 9-Apr-2019 20:01
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Did you have @coil in to do this?..





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Ultimate Geek
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  # 2213890 9-Apr-2019 20:08
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Ouch my eyes. A Tetraplegic could do better, that is awful.

 

 

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