t568a or b ?

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Chipparooney

10 posts

Wannabe Geek

#138561 8-Jan-2014 19:07

Hi all

I've just wired cat 6 cable all through our new house and I have terminated at wall plates under t568b wiring as opposed to "a"

It's now apparent after doing some more reading that the NZ standard is "a".

What are thee implications of this? The phone line is yet to be hooked up by telecom so I was wondering if this will have any impact on internet connections, phone connections etc?

Thanks

blakamin

4431 posts

Uber Geek
Inactive user

#963463 8-Jan-2014 19:16

If they're wired the same at both ends it shouldn't matter, from what I can gather, but I'm no expert. http://en.wikipedia.org/wiki/TIA/EIA-568

chevrolux

4962 posts

Uber Geek
Inactive user

#963509 8-Jan-2014 20:18

No real difference. Just simply a different order.

We generally use 568A in NZ though. The US uses 568B mostly.

Oncop53

273 posts

Ultimate Geek

#963539 8-Jan-2014 21:04

I was about to check myself which system we used in NZ (haven't started the wiring yet).
It probably doesn't matter, except you might need to make your own patch cables. I assume that all the ones you can buy in the stores are 568A.
I have a drawer full of patch cables, so I want to make sure my wiring is compatible.

Oncop53

273 posts

Ultimate Geek

#963544 8-Jan-2014 21:09

Actually now that I think about it, the patch cables should not matter. They are just passing the signal down the wires. It doesn't matter what colour they are.

bales

116 posts

Master Geek

Subscriber

#963549 8-Jan-2014 21:14

it wont make a difference to ph. line as pin out is same for both a &b ie bl-whbl is on 4&5

InstallerUFB

840 posts

Ultimate Geek

#963597 8-Jan-2014 22:45

Chipparooney: Hi all

I've just wired cat 6 cable all through our new house and I have terminated at wall plates under t568b wiring as opposed to "a"

It's now apparent after doing some more reading that the NZ standard is "a".

What are thee implications of this? The phone line is yet to be hooked up by telecom so I was wondering if this will have any impact on internet connections, phone connections etc?

Thanks

The implications are - none

- The b standard is/was used to introduce a half cross over in a structured network (cross over 10/100 and half x-over 1000) and so you could use a half cross over patch cable @ the switch, have a half cross over in the fixed cableing (a on the panel & b at the jack- or the other way around) and then use a none cross over patch cable to the device - ending with a net of no crossovers
- theoreticaly this could produce a better overall balance within the network cableing system. The theoretical difference I beleave has been proven with time - as components withing the cableing networks have been refined and improved - to be negligable.

With most network devices now having autosenceing it dosent mater what standard you have used (a @ both ends, b @ both ends or swopped @ either end ) your network will still work for data.

As for telephany either standard makes no differnce as pair one (Blue/White) on pins 4+5 is still pair one on both standards