CABLES
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. (When auto-negotiation is enabled for any RJ-45 port on this switch, you can use either straight-through or crossover cable to connect to any device type.)
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Crossover Cable
| | White/Orange Stripe | | |
| | Orange | | |
| 1 | White/Green Stripe | 1 | |
End A | 2 | Blue | 2 | End B |
| 3 | 3 | |
| | |
| 4 | White/Blue Stripe | 4 | |
| 5 | | 5 | |
| 6 | Green | 6 | |
| 7 | 7 | |
| | |
| 8 | White/Brown Stripe | 8 | |
Brown Stripe
Figure B-3. Crossover Wiring
1000BASE-T Pin Assignments
All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use straight-through cables for all network connections to PCs or servers, or to other switches or hubs.
The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports require that all four pairs of wires be connected. Note that for 1000BASE-T operation, all four pairs of wires are used for both transmit and receive.
Use 100-ohm Category 5, 5e or 6 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for 1000BASE-T connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet).