3-19
Cisco 7204 Installation and Configuration Guide
OL-5101-02
Chapter3 Installing the Cisco 7204 Connecting I/O Controller Cables
Note Referring to the RJ-45 pinout in Figure 3-17, proper common-mode line termina tions should be used for
the unused Category 5, UTP cable pairs 4/5 and 7/8. Common-mode termination reduces
electromagnetic interference (EMI).
Depending on your I/O controller RJ-45 interface cabling require ment s, us e t he pi no uts sh own in
Figure 3-17 and Figure 3-18 for straight-through and crossover twisted-pair cable connections.
Figure3-17 Straight-Through Cable Pinout, I/O Controller RJ-45 Connection to an End Station or DTE
Figure3-18 Crossover Cable Pinout, I/O Controller RJ-45 Connection to an End Station or DTE
To identify the RJ-45 cable type, hold the two ends of the cable next to e ach othe r so you c an see t he
colored wires inside the ends, as shown in Figure 3-19.
Figure 3-19 RJ-45 Cable I dentification
End stationEthernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
3 RxD+
6 RxD–
1 TxD+
2 TxD–
H10416
Ethernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
3 TxD+
6 TxD–
1 RxD+
2 RxD–
H10417
Hub
H5663