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Old 08-03-2015, 07:48 PM   #1
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Cat 5e ethernet jacks


I want to run a wire from my router/modem to another room in the house. I thought I would do it neat by running some cat 5e and installing jacks in the wall. Then just run an thernet cable from router to that wall jack and on the other end run an ethernet cable from that wall jack to the computer. Didn't just want to run an ethernet cable and drill holes and stuff which doesn't look the best.

So I picked up some wall plates and little ethernet jacks from home depot. The instructions have two different ways to wire it. One says for residential use and one way for commercial use. One is T568A and one is T568B. The only difference I think is that the green and orange terminals are reversed, the blue and brown are the same.

All I want to do is basically make an ethernet extension cord using jacks on each end and I don't think it will make one bit of difference which way I wire it since in reality it's just a jumper. It doesn't really care what wires are what as long as they are the same on each end.

But what is the difference between T568A and T568B? Why are the green and orange terminals reversed on those? What is the "norm" to use?

Cat 5e ethernet jacks-img_20150803_131000098.jpg

Cat 5e ethernet jacks-img_20150803_131005930.jpg

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Old 08-03-2015, 07:56 PM   #2
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Cat 5e ethernet jacks


It doesn't really matter which you use, as long as you use the same at both ends.
I would use the "A" version.

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Old 08-03-2015, 08:00 PM   #3
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Cat 5e ethernet jacks


I've always used 568B. It doesn't really matter as long as both ends are terminated the same.
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Old 08-03-2015, 08:26 PM   #4
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Cat 5e ethernet jacks


So why do they have two different termination options? Why wouldn't it be standardized?
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Old 08-03-2015, 08:39 PM   #5
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Cat 5e ethernet jacks


google t568a vs t568b
http://www.cableorganizer.com/articl...and-T568B.html

Last edited by brric; 08-03-2015 at 08:44 PM.
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Old 08-04-2015, 10:18 AM   #6
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Cat 5e ethernet jacks


Quote:
Originally Posted by joed View Post
It doesn't really matter which you use, as long as you use the same at both ends.
I would use the "A" version.
this is correct, i have been installing cat 5 since it came on the market in early 90's

the B or A are standards in different countries,

but in the end it doesn't really matter as long as both ends are the same
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Old 08-04-2015, 05:21 PM   #7
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Cat 5e ethernet jacks


The ole rule of thumb was that B is for commercial A is for residential. Reason being that white-blue/blue and white-orange/orange are correctly configured for line 1 and line 2 telephone service in 568A. So, you can easily convert a jack from phone to data and vice versa.

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