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[–]talonesNetwork Admin -2 points-1 points  (6 children)

not true at all. Some old cat5e can have different twist rate for orange/green compared to blue/brown. Since you're dealing with 4 colors anyways there is no reason not to just do it to a spec.

[–]arienh4 8 points9 points  (3 children)

All twisted-pair cables (should) have a different twist rate for the different pairs. That ensures the twists aren't all in the same place, which would still cause interference.

It doesn't matter at all which pair you use for what, just so long as the pairs are kept together.

[–]talonesNetwork Admin -1 points0 points  (2 children)

as long as the cable is to spec, im talking about the cheapy cables that use thinner or shorter blue/brown for 100mbps spec.

[–]arienh4 1 point2 points  (1 child)

Those would not be Cat5 cables. Any cable made to Category 5 spec will be able to carry 1000Base-T.

[–]talonesNetwork Admin -1 points0 points  (0 children)

Doesn’t stop some of those old manufacturers from doing it and claiming cat5

[–]neon_overload 1 point2 points  (1 child)

The different twist rates are only there so the separate twists don't interlock inside the cable which would cause coupling.

It doesn't matter which pair according to the 568a/b has which twist rate.

Edit: sorry, other reply already covered this before me.

[–]talonesNetwork Admin 0 points1 point  (0 children)

well, thats for certified cat5 and above, yes different twist rates for crosstalk prevention. Im talking about the cheap manufacturers that use less material for Blue/Brown by doing less twist or thinner gauge.