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# 260141 12-Nov-2019 17:58
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Hi everyone, recently moved into a newly built house and we’ve got gigabit internet. Plugging devices into the Ethernet sockets around the house and I get the expected wired speeds except for on one socket.

 

On this one socket the most I can get is about 97Mb down and up, so clearly it’s an issue somewhere between the socket and the patch panel, maybe a crimping issue? It’s not the device as I’ve tried others with the same result. 

 

Is there anything I can do myself or will I need to get the electrician back?





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  # 2352398 12-Nov-2019 18:05
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Sounds like it's negotiating 100 rather than 1000, but it would be good to confirm that. Are you sure that the patch cable going from your router/switch to that port on the patch panel is a proper patch cable, not one of the budget ones with only two pairs connected?

 

If it is a proper cat5e/cat6 cable, then the issue will be either a punch down issue at one end or the other, or damage to the cable. Most likely an issue where the cable is punched down.

Not difficult to fix but if it's a new house the sparky should have got it right first time - you can visually inspect both ends and see if there are any obvious issues. 


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Ultimate Geek


  # 2352400 12-Nov-2019 18:11
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Yep it has lost say a cable pair like green/green-white then drops down to other pairs and you get 100Mbs, if you look on Ethernet port on PC (right port on bottom right,  open networking, view network properties) on Link Speed it will likely say 100/100 instead of 1000/1000.


 
 
 
 


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  # 2352401 12-Nov-2019 18:13
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Most likely one of the wires (or multiple) is not connected correctly thus going at 100Mb/s instead of 1G/s

 

(100M uses wires  wires 1,2,3,6 and 1G uses all) 

 

So Wires 4,5 (blue) or 6,7 (brown) are loose/not connected properly.

 

Depending how they are connected use a proper punch tool to re-punch/re-terminate an end at a time (don't use a screw driver!!) but if you had a proper punch tool you'd try that already.

 

Just get the cable person back to do a (hopefully) a 30 second job when they are passing by.

 

 

 

 




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  # 2352406 12-Nov-2019 18:38
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Thanks for the replies. 

 

Link speed is showing 100/100 instead of the expected 1000/1000, my switch inside the patch panel also doesn’t have the 1000 light illuminated. 

 

Everything in the patch panel looks correct though, I can’t see any wires anywhere that don’t look like they haven’t been punched correctly. 





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  # 2352408 12-Nov-2019 18:57
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Have you switched the cable between the patch panel and switch? Often I will see people using the ethernet cables that come with modems from their ISPs that only have 4 out of the 8 wires which rules out anything other than 100mbit.

 


Unscrew the wall socket and take a picture of the termination and post it here, If it's a bad termination it should be pretty obvious.

 

As you've ruled out the device being the issue, You're likely going to have one of the following options as your fault
1) A bad termination on either the wall port or patch panel
2) A dodgy / bad cable between the patch panel and switch &/or wall port & device
3) A bad port on your switch
3) A bad cable run.

 

 




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  # 2352416 12-Nov-2019 19:13
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Definitely switched around the cables to eliminate that as an issue. 

 

Unfortunately the problem socket is the one inside the TV box on the wall behind the TV so it’s not easily accessible. 

 

I’ve got a photo of the patch panel, it’s socket 4 on the panel that’s an issue. 

 

Click to see full size





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Stu

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  # 2352429 12-Nov-2019 19:45
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Behind the TV? Ouch.

If you need any assistance, sing out.




Keep calm, and carry on posting.

 

 

 

Click to see full size Click to see full size


 
 
 
 


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Ultimate Geek


  # 2352494 12-Nov-2019 20:19
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You can buy a network line tester pretty cheap these days, easiest way to fix this sort of issue.

 

 

 

Its likely the socket at the other end with one loose wire or one around the wrong way.

 

 


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  # 2352553 12-Nov-2019 21:56
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sqishy:

 

Something like this:

 

 

 

https://www.trademe.co.nz/computers/cables-adaptors/networking/listing-2390917174.htm?rsqid=22194d393f7042fe9979eebeab978a02-001

 

 

 

 

 

 

I wouldn't use one of those if you paid me $3.45 - they're pretty useless for any sort of fault finding.

 

At the end of the day the OP purchased a new house and all cabling should have been tested. It's not the OP's job to test a cable, the person responsible for doing the work should return and fix it.

 

 


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  # 2355570 18-Nov-2019 10:51
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sbiddle:

 

I wouldn't use one of those if you paid me $3.45 - they're pretty useless for any sort of fault finding.

 

At the end of the day the OP purchased a new house and all cabling should have been tested. It's not the OP's job to test a cable, the person responsible for doing the work should return and fix it.

 

 

Perfectly OK for BASIC tests
eg test to see if all cables are wired correctly.

 

Could be the installer split the cable for 2 network ports, a tester will at least show that
basic tests, might be all thats needed .

 

I can almost guarantee thats all the installer(cough electrician) tested with. Could be why he has the issue :-)


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  # 2355666 18-Nov-2019 12:21
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1101:

 

sbiddle:

 

I wouldn't use one of those if you paid me $3.45 - they're pretty useless for any sort of fault finding.

 

At the end of the day the OP purchased a new house and all cabling should have been tested. It's not the OP's job to test a cable, the person responsible for doing the work should return and fix it.

 

 

Perfectly OK for BASIC tests
eg test to see if all cables are wired correctly.

 

Could be the installer split the cable for 2 network ports, a tester will at least show that
basic tests, might be all thats needed .

 

I can almost guarantee thats all the installer(cough electrician) tested with. Could be why he has the issue :-)

 

 

There are basic faults that those finders won't easily show with miswired pairs, and more importantly you have to ensure you look at both ends to check for the sequence. If you only look at the sequence at the master end it can all look good, but the remote end will show out of sequence lights.

 

But yes the problem is many people use cheap testers like that which is why they have faults.

 

 

 

 


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  # 2355675 18-Nov-2019 12:41
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The thing is you can spend an insignifigant amount more and get something that can identify all sorts of faults. Those cheap testers are fine for checking a pacth cable from the drawer of cables before use, but not really in wall stuff where people can make mistakes like with most residential wiring.





Richard rich.ms

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  # 2355690 18-Nov-2019 13:01
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For example?

 

richms:

 

The thing is you can spend an insignificant amount more and get something that can identify all sorts of faults. Those cheap testers are fine for checking a pacth cable from the drawer of cables before use, but not really in wall stuff where people can make mistakes like with most residential wiring.

 


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  # 2355692 18-Nov-2019 13:04
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bmoff:

 

For example?

 

 

https://www.aliexpress.com/item/33007909930.html

 

And work up from there.





Richard rich.ms

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