RJ45 Color order

[RonnieK]

Why is it always so hard to find this? Every time I need it because it's been a while that I've made any cables and don't remember the order it from before. Please help? I did find something that said pinout but no link to it.

[dirknerkle]

Why is it always so hard to find this? Every time I need it because it's been a while that I've made any cables and don't remember the order it from before. Please help?

1 - orange-white
2- orange
3 - green-white
4 - blue
5 - blue-white
6 - green
7 - brown-white
8 - brown

[theatretch85]

TIA/EIA 568B (most common) Pin 1-8
White Orange/Orange/White Green/Blue/White Blue/Green/White Brown/Brown.

TIA/EIA 568A (least common) Pin 1-8
White Green/Green/White Orange/Blue/White Blue/Orange/White Brown/Brown.

[deplanche]

Everything you ever wanted to know is in the wiki.

http://www.doityourselfchristmas.com/wiki/index.php?title=Pinouts#RJ45_and_CAT5

[RonnieK]

Thanks Everyone. I'm going to print it up and put it over my desk. Sometimes something so simple get to you when you can't find it.

Thanks again,
Ronnie

[theatretch85]

1 - orange-white
2- orange
3 - green-white
4 - blue
5 - blue-white
6 - green
7 - brown
8 - brown-white

If you are going by industry standard; the brown pair as you have it listed is wrong. First you should never have 2 white/x wires or solid colors next to each other. Second, the white/x of the color pair always comes first.

Really in how these cables are being used in the renard setup, it doesn't really matter the order so long as each end is wired the same. But its always best practice to do it to the industry standard then to do it some other way.

[dirknerkle]

If you are going by industry standard; the brown pair as you have it listed is wrong. First you should never have 2 white/x wires or solid colors next to each other. Second, the white/x of the color pair always comes first.

Really in how these cables are being used in the renard setup, it doesn't really matter the order so long as each end is wired the same. But its always best practice to do it to the industry standard then to do it some other way.

Fixed - thanks - edited original -- one shouldn't write these things while on the phone ;)

[djulien]

If you are going by industry standard; the brown pair as you have it listed is wrong. First you should never have 2 white/x wires or solid colors next to each other. Second, the white/x of the color pair always comes first.

Is there a technical reason why the industry standard is that way, or is it just a matter of more easily picking out the correct wire during assembly or repair?

don

[rokkett]

Think it is a combination. The colors match in the twisted pairs, e.i. brown/brown-white. Then separated out in the plug - the green/green-white sandwiched around the blue/blue-white pair because to reduce the induced crosstalk on the pairs...


I always use TIA/EIA 568B in my cables....

[dirknerkle]

Is there a technical reason why the industry standard is that way, or is it just a matter of more easily picking out the correct wire during assembly or repair?

don

Each pair also has a different twist count per meter as well so as to reduce interference.

[WireWrap]

One of the major reasons for the standard is to ensure that interference is minimized. By using pairs that are twisted together, particularly for differential circuits like RS485, if noise is induced in one conductor, it will likely also be induced in the matching wire in about the same amplitude. When these noise impulses reach the destination, the impulse has no effect, as it is the same on both, and the input is looking for the differences between the two conductors. That is why RS485 is rated for 1000 meters (over 1/2 mile), while RS232 is only rated for 15 meters (about 50 feet).

Aren't you sorry you asked???:rolleyes: :rolleyes:


:smile:

[rokkett]

Actually, I may be on my way to an EE degree just reading the forum....

Thanks for the info! :)

[mrpackethead]

Theres standards, but you can wire it up anyway you like.. :-) lol...

[budude]

Theres standards, but you can wire it up anyway you like.. :-) lol...

Agreed - the key thing is to try to be consistent. I used Orange(almost Red)/Green/Blue/Brown order for my RGB+X wiring on my LED strips. It made it easy to remember which color I was driving when I hard wired the other ends...