Question

CAT5e - Wall plate to RJ45 plug connection

Asked by: DuffyS40

I just been asked to look at a house with CAT5e cable connection,  one end will go into the wall keystone plate, but the other end wont be a patch panel, just RJ45 plugs straight into a switch.
Could some experts give me some ideas how I should wire the wall sockets and how to match the connections on the RJ45 plugs ?
The sockets they have are not colored or numbered, but if I imagine the connection points (looking from the back of the plates) are on the top of the plate , and the RJ45 socket are just under the wiring.

The sockets from the back of the plate looks like this :

#  #
#  #
#  #
#  #

===
===     <-- RJ45 connector

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Asked On
2008-07-24 at 05:51:12ID23591840
Topics

Telecommunications Providers

,

Networking Cables

,

Networking Hardware

Participating Experts
5
Points
500
Comments
28

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Answers

 

by: pseudocyberPosted on 2008-07-24 at 05:57:03ID: 22078558

Just taking a wag at it ... I'd try:

white/orange     orange
white/green        blue
white/blue          green
white/brown       brown

This might match a 568B pinout (which is what I'm shooting for).  You'll need some kind of wire mapper/tester.  You could use a multimeter in a pinch - you could break out the pins with wires and test for continuity.

 

by: pseudocyberPosted on 2008-07-24 at 05:58:18ID: 22078569

I'm assuming they're in this pattern

1 2
3 4
5 6
7 8.

If they're like this:

1 5
2 6
3 7
4 8

then adjust my first guess appropriately.

 

by: bmsjeffPosted on 2008-07-24 at 06:05:27ID: 22078627

Do you have a tester?  If so, use a short piece of cable to test your wiring scheme.  Adjust it as necessary until you have continuity with all 4 pairs.  Follow the same for all the rest of the jacks.

You can get an inexpensive one at your local computer store.
http://www.cdw.com/shop/products/default.aspx?EDC=1293105

 

by: DuffyS40Posted on 2008-07-24 at 06:07:28ID: 22078648

Thanks ps, I will try both combo, but what about the RJ45 plug, how should the wire be map ?

 

by: pseudocyberPosted on 2008-07-24 at 06:09:41ID: 22078667

Oh, I thought you knew that side.

pin1 (looking down at the rj45 with the tab on the "other side) pin 1 is on the left.

pin 1 - pin 8 as follows

white orange 1
orange
white green
blue
white blue
green
white brown
brown - 8

 

by: DuffyS40Posted on 2008-07-24 at 06:09:49ID: 22078671

Just to say the plugs will then go into a switch, switch to router/modem

 

by: mwecomputersPosted on 2008-07-24 at 06:15:28ID: 22078727

Another option (if you don't feel like having to worry about pinouts and patterns) -- you might look at using a RJ45 female/female keystone coupler:
http://www.cyberguys.com/templates/SearchDetail.asp?productID=5648&ta=prod_info

 

by: bmsjeffPosted on 2008-07-24 at 06:16:12ID: 22078733

 

by: DuffyS40Posted on 2008-07-24 at 06:17:42ID: 22078743

Thanks everyone, will go there and try now

 

by: DuffyS40Posted on 2008-07-24 at 10:21:02ID: 22081411

OK, I just got back, using pseudocyber's map
1 2
3 4
5 6
7 8

It senses the connection, but wont connect, so I dropped the speed to 10 and this allowed the connection to the switch and worked ok with the router/internet, I faintly remembered some years back when I were making these 100 cables, that a pair within the bunch needed to be switched over for 100 to work, but cant remembered which one, could one of you experts shine some light on this ?

Thanks again all

 

by: bmsjeffPosted on 2008-07-24 at 10:31:52ID: 22081528

 

by: shareditPosted on 2008-07-24 at 10:35:08ID: 22081557

just some input,  it looks like you are in Europe.  I believe your typical wiring standard is 568A

but as long as it is straight through you will not have a problem

 

by: pseudocyberPosted on 2008-07-24 at 10:35:25ID: 22081560

If your pinout is wrong, you could be splitting the pairs causing electrical interference with 100Mb and it might work wiht 10.

If you keep the pairs 568B on both ends, 10/100/1000 should work.

You need something to test the pinouts and draw a wiremap.

 

by: pseudocyberPosted on 2008-07-24 at 10:39:13ID: 22081589

568A - swap the greens and oranges.  However, either will work the same - as long as they're the same on both ends.

 

by: bmsjeffPosted on 2008-07-24 at 10:41:10ID: 22081614

Have you tested the connection with a tool?  It will tell you exactly which pairs are crossed.

 

by: DuffyS40Posted on 2008-07-24 at 11:00:51ID: 22081803

Yes, UK
pse, do you meant swap just the green & orange or the green pairs and orange pairs ?
Sorry to sound stupid, but this is not my day job :)

Currently, my plug assignment are as follow, looking at the plug with the clip facing  down, from left to right :
Br
G
B
O
W/Br
W/B
W/G
W/O


The wall socket, looking from the back :

WO     O
W/G    B
W/B    G
W/Br   Br

=====
=====      <-- socket

Could someone please tell me which wire I need to change or swap, in a simple way that I can understand ?
Many thanks all

 

by: shareditPosted on 2008-07-24 at 11:08:05ID: 22081863

I wouldn't guess that this is the problem yet, but there are different types of RJ45s for solid and stranded cable, I have seen patch cables not work correctly because of the incorect type.

Is this a newly installed line? or are you troubleshooting an existing drop?

What is the manufacturer of the keystone jack,  why guess if we can find the pinout? It is very odd that there are not at least numbers on the jack.  is this a modular jack or is the plate and punch in one unit?  

if this is an existing line check the pins in the jack itself, old jacks can sometimes get their pins pushed up so no connection can be made.

a tester is going to tell you a lot, wiremap xtalk attenuation. maybe the line itself was pulled incorrectly.  

 

by: shareditPosted on 2008-07-24 at 11:12:31ID: 22081901

hold the rj45 in your hand, clip down, cable going towards you

pins will be:
568A
w/gr, gr, w/or, bl, w/bl, or, w/br, br
568b
w/or, or, w/gr, bl, w/bl, gr, w/br, br


the jack needs to be wired correctly
without colors or at least numbers we are just guessing

 

by: pseudocyberPosted on 2008-07-24 at 11:12:44ID: 22081906

If you're looking down on the RJ45, with the tab underneath (not visibile), pointed away from you, pin 1 will be on the left.  For 568B, it should be white orange.  Pin 8 will be on the right - it will be brown.

Are they reversed?

 

by: DuffyS40Posted on 2008-07-24 at 11:51:21ID: 22082282

Hi pse, looking at the plug with the tab underneath, left (pin 1) is brown.

 

by: shareditPosted on 2008-07-24 at 13:04:23ID: 22082973

hey, look at my pin out.  If you look at the one you typed up it is completely wrong.

you have all the whites on one side, and all the solids on one side.  the correct pattern will alternate white color white color white color etc.

hold the rj45 as i have described and terminate it as I have described.

I did this ish for many years prior to my current job.

Once you have the rj45 terminated correctly, you will have to figure out the pinout on the jack,  without any labling on the jack you can: guess,  try to find some info from the manufacturer, punch down a likely positioning and do a wiremap with a tester to see what is not correct.

take your pick

 

by: shareditPosted on 2008-07-24 at 13:08:36ID: 22083019

If you are still unsure about how to correctly terminate an RJ45, grab a patch cable and make yours look like it. That will give you even more of an idea on the correct color sequence.

 

by: DuffyS40Posted on 2008-07-24 at 14:32:38ID: 22083735

sharedit, its a new install, the electricians layed the cable only, then the builders got the wall plates, the packaging doesnt contain any info, and the sockets have no info either, no color code and no numbering. their suppliers have no info either, they just supply them and knows nothing about them except on the front it read 'CAT5e'

Even though now the coloring are 4 solid/4 blinks, at least they work at 10, I know its not the correct way to wire these up, but the telecom guy already crimp all the sockets, I were hoping for an easier way to just change the layouts of the plugs to match the already done sockets.

Sorry this thing is dragging on like a sore head.

 

by: CallandorPosted on 2008-07-24 at 15:23:45ID: 22084166

Do the pictures of the wall socket here help?  http://en.wikipedia.org/wiki/Category_5_cable

 

by: shareditPosted on 2008-07-25 at 07:07:37ID: 22088707

Ive told you how to correctly terminate the RJ45 you just need to make the jack match the RJ45.

If I'm reading your color code for the RJ45 you are transmiting on brown and green you are recieving on blue white/blue  i might guess the only reason you get 10 is because you happen to have Rx using the same pair, where Tx is using 1 conductor from two pairs.

You can chose to finish the job however you like. you have been told how to correctly terminate 568A or B.

Whom ever is doing your termination is doing them wrong, so you need to talk to them. I don't know your role, or the situation so i cannot comment too much on any of that, but it sounds to me like you are being dicked around. I cant terminate the cable for you. If you are unable, and do not have the resources to terminate or test the line you need to pay someone who can to do it for you.

that is my expert advice

 

by: bmsjeffPosted on 2008-07-25 at 12:19:42ID: 22091496

I concur with sharedit.  For $40.00, you can buy a tester and eliminate all the guesswork.

 

by: pseudocyberPosted on 2008-07-25 at 12:35:48ID: 22091620

Boy, talking about the blind leading the blind.

At this point, you might want to tell them you're going to scrap all the jacks - that the Eye Dee 10 Tee's before you ordered the wrong thing.  Get on a good networking site, like Greybar, Anixter, etc and order up some nice patch panels and corresponding wall jacks and plates.

the electricians layed the cable only, then the builders got the wall plates, the packaging doesnt contain any info, and the sockets have no info either, no color code and no numbering. their suppliers have no info either, they just supply them and knows nothing about them except on the front it read 'CAT5e'
 
Even though now the coloring are 4 solid/4 blinks, at least they work at 10, I know its not the correct way to wire these up, but the telecom guy already crimp all the sockets, 

                                              
1:
2:
3:

Select allOpen in new window

 

by: DuffyS40Posted on 2008-08-13 at 10:31:51ID: 22223828

pseudo, I managed to get new modules and tested here in my office thats color coded, plug on 568B and spot on. thanks a lot for your patients.

20120131-EE-VQP-002

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