Crossover Wiring; 1000Base-T Pin Assignments; Figure B-3. Crossover Wiring - Enterasys Matrix-V V2H124-24FX Hardware Installation Manual

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 an RJ-45 module
port, you can use either straight-through or crossover cable to connect to any device
type.)
End A

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).
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Crossover Cable
White/Orange Stripe
White/Green Stripe
1
2
3
4
5
6
7
8

Figure B-3. Crossover Wiring

Twisted-Pair Cable and Pin Assignments
Orange
Green
B
1
2
End B
3
4
5
6
7
8
B-3