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308 posts

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#226309 31-Dec-2017 16:07
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Hello all,

 

I asked an electrician come and lay cat6 cable in my home with 8 rj45 sockets in my network cabinet and the corresponding 8 scattered around the house, where I indicated.

 

After a day of work (9-4) he asked me if I can help him understand why netwrork cable tester leds are blinking out of order whereas they are supposed to blink in order. Since I never laid a network or use the tester I said no. He told me that he spent last three hours trying to understand that and he is too tired and that he'd come back another day.

 

Now this got me interested. Next day I got the cable tester from pbtech and did some testing myself. What I noticed is that he wired the plugs (not sure what for, both ends were supposed to be sockets) not the way it's shown here 

 

http://www.incentre.net/tech-support/other-support/ethernet-cable-color-coding-diagram/

 

 

 

his way did not match either A or B. He did them:

 

- green striped

 

- green

 

- orange striped

 

- blue striped 

 

- blue

 

- orange

 

- brown striped

 

- brown

 

May be this is some system I have not come across in my internet research, I'm a newbie here, so what do I know.

 

 

 

I also took a socket from the wall and this is what it looked like:

 

Click to see full size

 

I may be wrong, but this does not look like anything I've seen on images or videos about cat6 keystone punching. To me it looks like all the wires are entangled with each other, which, according to my research could induce a lot of cross-talk, affecting speed.

 

Now, since I'm not an expert, I'm asking you, guys, does this look okay?

 

I want to understand a little better when the electrician returns to finish his job what is being done.

 

Another question, how do they choose if to use T-568A or T-568B?

 

Cheers,

 

Andrew

 

 


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Stu

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  #1927379 31-Dec-2017 16:11
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Blue/blue striped are around the wrong way. Need to be swapped.

Doesn't matter if A or B, just as long as they're the same at each end of the cable




Keep calm, and carry on posting.

 

 

 

Click to see full size Click to see full size


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  #1927380 31-Dec-2017 16:17
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What you have described is the standard connections for a cable that has the crimped plugs on it, it would go from the wall socket to the computer.

 

 

 

As far as the newly installed sockets in the wall they should be straight thru 568A style none of the cores should be swapped over.


 
 
 
 


Stu

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  #1927381 31-Dec-2017 16:19
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OP mentioned the sparky installed plugs, not the requested sockets.




Keep calm, and carry on posting.

 

 

 

Click to see full size Click to see full size


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  #1927382 31-Dec-2017 16:29
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Stu: OP mentioned the sparky installed plugs, not the requested sockets.

 

 

 

Now this got me interested. Next day I got the cable tester from pbtech and did some testing myself. What I noticed is that he wired the plugs (not sure what for, both ends were supposed to be sockets) not the way it's shown here

 

looks to me the ends of the cables coming out of the walls had plugs crimped on....it's a bit strange??, I would have had wall sockets and then brought the pre-made cables - they are dirt cheap.

 

 

 

If you wanted wall sockets (not plugs) get the electrician back to put it right

 

 




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Ultimate Geek

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  #1927383 31-Dec-2017 16:30
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Thank you all, so nothing unusual about the picture?

 

If you wanted wall sockets (not plugs) get the electrician back to put it right

 

Half of the 4 connections are not working anyway so I hope he is coming back next week after the holiday is over.... He said he would.


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  #1927384 31-Dec-2017 16:31
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zespri:

 

Thank you all, so nothing unusual about the picture?

 

 

 

 

The picture link is broken for me




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  #1927385 31-Dec-2017 16:36
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gregmcc:

 

zespri:

 

Thank you all, so nothing unusual about the picture?

 

 

 

 

The picture link is broken for me

 

 

I tried to fix it, is it visible now?


 
 
 
 


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  #1927387 31-Dec-2017 16:44
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zespri:

 

gregmcc:

 

zespri:

 

Thank you all, so nothing unusual about the picture?

 

 

 

 

The picture link is broken for me

 

 

I tried to fix it, is it visible now?

 

 

 

 

Yes working,

 

 

 

It's a terrible job, I doubt a punch down tool was used as it should have trimmed off the excess cable at the same time. As for the correct connections, can't really tell from that picture as there are many different brands and the connection layout varies.

 

 

 

My guess would be that a punch down tool wasn't used and as a result the connections arn't made correctly. the cover over the wires should unclip and it should be marked on the back the correct colour codes.

 

 




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  #1927388 31-Dec-2017 16:48
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gregmcc:

 

My guess would be that a punch down tool wasn't used and as a result the connections arn't made correctly. the cover over the wires should unclip and it should be marked on the back the correct colour codes.

 

 

Yes, I was looking for the color marking and could not find them on any side, that's mainly why I asked, I wanted to compare the wire colours against the markings but I cannot see the markings.


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  #1927391 31-Dec-2017 17:06
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Unclip the back on socket and take another photo.





Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+. UAP, UAP AC Pro, UAP AC Pro Mesh, Apple TV 4, Apple TV 4K, iPad Air 1, iPhone 6s, VodaTV Gen 2. If it doesn't move then it's data cabled.


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  #1927396 31-Dec-2017 17:20
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It looks like Stranded core Ethernet cable has been used not Solid Core. 


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  #1927398 31-Dec-2017 17:32
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You can just make out the color coding on the backside of the RJ45 Plug under all the wires.

 

The guy is going to have to redo the whole thing anyway so just pull the wires out and compare the guide with your photo above.

 

However if your Ethernet tester is showing LED's blinking out of order its more likely he has used A on one side and B although looking at the RJ45 jack it looks like he has randomly reversed striped and unstriped cores maybe to try and stop it from blinking out of order which would not work anyway as the pins on the back do not align with the pin numbers in the RJ45 jack





Geoff E


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  #1927427 31-Dec-2017 19:44
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This is of no help whatsoever, 

 

But your first mistake is getting a sparky to run data, 

 

 

 

My sparky m8 received a call from a data specialist who was doing some additions to some data he had run the previous year. 

 

The data guy was asking what standard was used as he was unfamiliar with the stanard used,

 

after being told it was the sparky's own standard the data guy hung up. 

 

 

 

 


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  #1927652 1-Jan-2018 16:14
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zespri:

 

Thank you all, so nothing unusual about the picture?

 

If you wanted wall sockets (not plugs) get the electrician back to put it right

 

Half of the 4 connections are not working anyway so I hope he is coming back next week after the holiday is over.... He said he would.

 

 

Unusual? Apart from the horribly messy job and mixed up wires? Its a keystone but cant tell from that picture if its cat6 or whether wires are tangled, but there should be no lose wire anywhere and each pair should be twisted to prevent crosstalk. Its such a messy job I would wonder if hes ever done training on how its supposed to be done, and he should have told you he knows nothing about cat6 before he started the job. All jacks thoughout your house need to be tidied up and probably re-terminated.

 

He probably wasn't sure whether to choose T568A or B himself, but if he had stuck with A its fine. Normally we do T568A in NZ just because its more standard here but you just have to choose one and be consistent throughout the job.

 

I could fix it for you if you in Auckland.





Qualified in business, certified in fibre, stuck in copper, have to keep going  ^_^

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