Specifications

12E/2FE Port Adapter Receptacles, Cables, and Pinouts
PA-12E/2FE Ethernet Switch 10BASE-T and 100BASE-TX Port Adapter Installation and Configuration
1-4
Figure 1-3 12E/2FE RJ-45 Connections, Plug and Receptacle
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports
contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when
connecting cables.
Table 1-2 12E/2FE RJ-45 Connector Pinout
Note Referring to the RJ-45 pinout in Table 1-2, proper common-mode line terminations should be
used for the unused Category 3 and Category 5, UTP cable pairs 4/5 and 7/8. Common-mode
termination reduces electromagnetic interference (EMI).
Depending on your 12E/2FE RJ-45 interface cabling requirements, use the pinouts shown in
Figure 1-4 and Figure 1-5 for straight-through and crossover twisted-pair cable connections.
Figure 1-4 Straight-Through Cable Pinout, 12E/2FE RJ-45 Connection to an End Station
Pin Description
1 Receive Data + (RxD+)
2 RxD–
3 Transmit Data + (TxD+)
6 TxD–
H2936
8 7 6 5 4 3 2 1
RJ-45 connector
End stationEthernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
3 RxD+
6 RxD–
1 TxD+
2 TxD– H10416