Port and Cable Assignments
Straight-Through Wiring
If the twisted-pair cable is to join two ports and only one of the ports has an internal crossover (MDI-X), the two pairs of wires must be straight-through. (The CPE RJ-45 port auto-negotiates MDI or MDI-X pinout selection, allowing you to use either straight-thorough or crossover cable when connecting to another network device.)
EIA/TIA 568B RJ-45 Wiring Standard 10/100BASE-TX Straight-through Cable
| | White/Orange Stripe | |
| | Orange | |
| 1 | White/Green Stripe | 1 |
End A | 2 | | 2 |
| 3 | Blue | 3 |
| 4 | | 4 |
| 5 | White/Blue Stripe | 5 |
| 6 | Green | 6 |
| 7 | 7 |
| 8 | White/Brown Stripe | 8 |
| | |
Brown
Crossover Wiring
If the twisted-pair cable is to join two ports and either both ports are labeled with an “X” (MDI-X) or neither port is labeled with an “X” (MDI), a crossover must be implemented in the wiring. (The CPE RJ-45 port auto-negotiates MDI or MDI-X pinout selection, allowing you to use either straight-thorough or crossover cable when connecting to another network device.)
EIA/TIA 568B RJ-45 Wiring Standard 10/100BASE-TX Crossover Cable
| | White/Orange Stripe | |
| | Orange | |
| 1 | White/Green Stripe | 1 |
End A | 2 | | 2 |
| 3 | Blue | 3 |
| 4 | | 4 |
| 5 | White/Blue Stripe | 5 |
| 6 | Green | 6 |
| 7 | 7 |
| 8 | White/Brown Stripe | 8 |
| | |
