TWISTED-PAIR CABLE AND PIN 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. (When auto-negotiation is enabled for any RJ-45 port on the switch, you can use either straight-through or crossover cable to connect to any device type.)
You must connect all four wire pairs as shown in the following diagram to support Gigabit Ethernet connections.
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 | Blue | 2 | End B | 
|   | 3 | 3 |   | 
|   | 4 |   | 4 |   | 
|   | 5 | White/Blue Stripe | 5 |   | 
|   | 6 | Green | 6 |   | 
|   | 7 | 7 |   | 
|   | 8 | White/Brown Stripe | 8 |   | 
|   |   |   |   | 
Brown
Figure B-2 Straight-through Wiring