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EIA/TIA 568A and 568B UTP Jack Pin Assignment
Confusion
Last updated: 10/15/01
Q. Is the cable labeled 568B on your page LETS
MAKE IT SIMPLE in your HOW
TO MAKE YOUR OWN CAT 5 TWISTED-PAIR NETWORK CABLES article
ACTUALLY wired to 568A? I have several manufactured cables that
have 568A on the label and when I look at the wiring layout it
looks like the one you have labeled 568B.
A. Your message is not the first I've seen
questioning the EIA/TIA 568A and 568B UTP Jack Pin Assignments and Color
Codes for the 568A and 568B plugs and jacks in that article. The
diagrams in the article are correct. I have verified them quite a few
times. You will see them on the Internet the way I have them and you will
see them on some web sites where they are the opposite, incorrect. I
have also seen commercially made cables that were labeled incorrectly. I
believe the problem stems from the fact that the old ATA&T 258A color
code is the same as the 568B standard.
"ANSI/TIA/EIA 568
COMMERCIAL BUILDING TELECOMMUNICATIONS
CABLING STANDARD"
...
"TIA/EIA 568
EIGHT-POSITION JACK PIN/PAIR ASSIGNMENTS
TIA/EIA T568A
TIA/EIA T568B
 "
Also see The
Difference Between the T568A and T568B Wiring Standards. |
