CAT 6
Ethernet CAT 6 pinouts: straight-through vs. crossover wiring.
Straight-Through (T568B both ends)
Standard cable for PC-to-switch, PC-to-router, or any device-to-switch/router run. Modern auto-MDI-X ports also make this work fine for switch-to-switch or PC-to-PC links, which is why straight-through has become the near-universal default.
| Pin | Wire |
|---|---|
| 1 | White-Orange |
| 2 | Orange |
| 3 | White-Green |
| 4 | Blue |
| 5 | White-Blue |
| 6 | Green |
| 7 | White-Brown |
| 8 | Brown |
Both ends wired identically.
Crossover (T568A one end, T568B the other)
Needed for a direct PC-to-PC or switch-to-switch link on older hardware without auto-MDI-X.
Side 1 — T568A:
| Pin | Wire |
|---|---|
| 1 | White-Green |
| 2 | Green |
| 3 | White-Orange |
| 4 | Blue |
| 5 | White-Blue |
| 6 | Orange |
| 7 | White-Brown |
| 8 | Brown |
Side 2 — T568B:
| Pin | Wire |
|---|---|
| 1 | White-Orange |
| 2 | Orange |
| 3 | White-Green |
| 4 | Blue |
| 5 | White-Blue |
| 6 | Green |
| 7 | White-Brown |
| 8 | Brown |