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Help With Making Rollover Cables.

R

Rubicone

Senior member
What exactly is the colour sequence for EIA/TIA 568A for a rollover cable. On Cisco's site they indicate that pin 1 and pin 8 should be the same colour, namely, white and that a rollover cable reverses pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5. But what is the colour order of the other pins? Is one the mirror reflection of the other. I found one site which lists the order as follows, but with no indication of the standard that they are following:


Pin Colour
#

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

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


 
Well, if you want a 568A rolled cable, do one end 568A and roll the other end.


W/Grn Grn W/Or Bl W/Bl Or W/BR Br


Br W/BR Or w/Bl Bl W/Or Grn W/Grn
 
Thanks for the links, Jack, but he is looking at making a rolled cable, not a crossover. 😉

Rubicone: Reading from left to right, I'm starting at pin 1 and going to pin 8. So look at it like this:

W/Grn Grn W/Or Bl W/Bl Or W/BR Br
1 2 3 4 5 6 7 8

Br W/BR Or w/Bl Bl W/Or Grn W/Grn
1 2 3 4 5 6 7 8
 
CTR thanks for the response but just to remove any doubts I may have is there a way of corroborating the colour sequence from another source? What standard is the link I provided above following? Are you using 568A?
 
Rollover = Serial = Dont give a Damn about Specs for anything under 100 feet.


Pin 1 = Pin 8
Pin 2 = Pin 7
Pin 3 = Pin 6
Pin 4 = Pin 5
Etc.


Use any color you like as long as the wires line up
 
Gee Xanathar, sounds like you have made one too many cables and are developing a form of cable madness.😉 Unfortunately, for me, at this point I do have to know about standards and colour code sequence. 🙁
 
Rubicone: This adheres to 568A. Xanathar is right in that there is no EIA/TIA spec for rollover cables. But you said you wanted 568A so I pinned it 568A for you.

W/Grn Grn W/Or Bl W/Bl Or W/BR Br
(this one is 568A)

Br W/BR Or w/Bl Bl W/Or Grn W/Grn
(this end is rolled)
 
Aren't rollovers just backwards on each end? Like in your first post, 1 and 8 flipped, 2 and 7 flipped, it all looks like this:

1 2 3 4 5 6 7 8
8 7 6 5 4 3 2 1

Everything is just reversed on one end. Most rollover cables(console cables)are flat if you buy them from a store. Real easy to make, one end is normal, the other is the reverse of it.
 
sounds like rubicone is studying for a test?

There is no such thing as a 568A rollover cable. If you roll the cable then it is no longer 568a. But yes, a rollovercable is one that has been...well...rolled as CTR et. al. has recommended.

FYI - 568a and 568b are just EIA/TIA standards for wire mappings. Most installations are 568b.
 
LOL. Yes, there is such a thing as a rolled 568A cable, just as there is such a thing as a rollover cable for the 568B standard. It just depends on which pinouts you start with, and no matter what standard you choose the rollover cable can still be used.

Xanathar and Hard_Boiled are correct on the sequence. Everything just gets flipped from one RJ-45 to the other RJ-45.
 
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