
6
Ethernet Ports
RJ-45 Ports (Auto MDI/MDIX)
The RJ-45 ports are auto-sensing for 10Base-T, 100Base-TX or
1000Base-T devices connections. Auto MDI/MDIX means that the
switch can connect to another switch or workstation without
changing the straight-through or crossover cabling. See the figures
as below for straight-through and crossover cabling schematics.
10/100BASE-T(X) RJ-45 Pin Assignments (Table 2.2)
Crossover Cable Straight Through Cable
Pin Number / Signal Pin Number / Signal Pin Number / Signal Pin Number / Signal
1 / RX+ 3 / TX+ 1 / RX+ 1 / TX+
2 / RX- 6 / TX- 2 / RX- 2 / TX-
3 / TX+ 1 / RX+ 3 / TX+ 3 / RX+
6 / TX- 2 / RX- 6 / TX- 6 / RX-
Table 2.2
1000BASE-T RJ-45 Pin Assignments (Table 2.3)
Crossover Cable Straight Through Cable
Pin Number / Signal Pin Number / Signal Pin Number / Signal Pin Number / Signal
1 / TP0+ 3 / TP1+ 1 / TP0+ 1 / TP1+
2 / TP0- 6 / TP1- 2 / TP0- 2 / TP1-
3 / TP1+ 1 / TP0+ 3 / TP1+ 3 / TP0+
4 / TP2+ 7 / TP3+ 4 / TP2+ 4 / TP3+
5 / TP2- 8 / TP3- 5 / TP2- 5 / TP3-
6 / TP1- 2 / TP0- 6 / TP1- 6 / TP0-
7 / TP3+ 4 / TP2+ 7 / TP3+ 7 / TP2+
8 / TP3- 5 / TP2- 8 / TP3- 8 / TP2-
Table 2.3
Note: “+” and “-” signs represent the polarity of the wires that make up each wire pair.