Ethernet (RJ45) Cable Specifications and Pin Assignments
Figure 3
Table 8 - Cable Specification
Cable Type
Max.
Length
Connector
10BASE-T
Cat. 3, 4, 5 100-ohm UTP
100 m (328 ft)
RJ45
Table 9 - J1 Ethernet
Pin
Number
MDI Signal Name
MDI-X Signal Name
1
Transmit Data (TD+)
Receive Data (RD+)
2
Transmit Data (TD-)
Receive Data (RD-)
3
Receive Data (RD+)
Transmit Data (TD+)
6
Receive Data (RD-)
Transmit Data (TD-)
Pins 4, 5, 7, and 8 are not connected.
Table 10
Straight-Through
RJ-45 Pin
Assignments
End 1
End 2
1 (TD+)
1 (TD+)
2 (TD-)
2 (TD-)
3 (RD+)
3 (RD+)
6 (RD-)
6 (RD-)
Table 11
Crossover RJ-45
Pin Assignments
End 1
End 2
1 (TD+)
3 (RD+)
2 (TD-)
6 (RD-)
3 (RD+)
1 (TD+)
6 (RD-)
2 (TD-)
MicroGate™ User Manual 11
