Question

Wiring Pinout question

Asked by: zdpl0a

Hello Experts:

Our company has recently had a dsl line installed and it has been tested and works fine.  Problem is, the jack that was installed was a RJ11 instead of RJ45.  I'd like to install an RJ45 jack to replace the RJ11 jack, but I am unsure of the pinout to accomplish this.

Any suggestions or things that I might be missing?

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Asked On
2002-09-11 at 09:37:38ID20356381
Tags

pinout

,

rj11

,

jack

Topics

Telecommunications Providers

,

Miscellaneous Networking

Participating Experts
3
Points
50
Comments
6

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Answers

 

by: lrmoorePosted on 2002-09-11 at 10:19:15ID: 7277522

Use the center 4 pins of the RJ45 jack in the same order as they are on the RJ11

 

by: SMackPosted on 2002-09-11 at 17:09:59ID: 7278547

The typical pinout for an RJ45 would be:

Pair 1: pins 4 & 5 (the middle pair)- the "blue pair"
Pair 2: pins 3 & 6 (straddling pair one) - the green pair
Pair 3: pins 1 & 2 (the orange pair)
Pair 4: pins 7 & 8 (the brown pair)

The "color"/white wire is lower value than the solid color on an IDC connector (usually the left, as viewed from the rear of the jack).

As described above, would conform to the "568B" cabling scheme. For "568A" reverse the orange pair and the green pair.

So, as mentioned in the previous post, the middle four pins, blue in the middle straddled by (usually) the green pair.

Good Luck

Scott


 

by: lrmoorePosted on 2002-09-11 at 17:18:03ID: 7278558

SMack,
You're correct in the color coding, but you're assuming there is CAT5 wire behind the RJ11 jack. I would bet it is standard phone wire, perhaps CAT3, with 4 wires, red, yellow, green, black...

 

by: SMackPosted on 2002-09-11 at 20:32:29ID: 7278887

Good point.

Yellow, green, red, black ...

If you use a Category-rated jack/plate:

Yellow/black = green post
green/red = Blue post

A phone-style RJ45 plate/keystone will use the same colors, just match 'em up.


Make sure you label the face of the jack-plate ... someone might plug in an Ethernet cable and get some serious ring-voltage.

Good Luck

Scott

 

by: escheiderPosted on 2002-09-11 at 20:36:25ID: 7278892

Actually, it is cat5 cable that has been run from a patch panel, and is using only one pair striped blue (green) and blue (red).

 

by: zdpl0aPosted on 2002-09-13 at 18:40:07ID: 7279753

Thanks for all the details.  Although everyone is correct, lrmoore provided the answer first.  I verified the information with our phone guy.  A standard RJ11 uses one pair for TX and RX and if converting to RJ45, it uses striped blue and blue.

Thanks for all your help

20120131-EE-VQP-002

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