Cisco 7200 VXR router User Manual page 122

Connecting I/O Controller Cables
Note
line terminations 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 requirements, use the pinouts
shown in Figure 3-17 and Figure 3-18 for straight-through and crossover twisted-pair cable
connections, respectively.
Figure 3-17
Ethernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
Figure 3-18
Ethernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
To identify the RJ-45 cable type, hold the two ends of the cable next to each other so you
can see the colored wires inside the ends, as shown in Figure 3-19.
3-28 Cisco 7200 VXR Installation and Configuration Guide
With regard to the RJ-45 pinout in Table 3-4, you need to use proper common-mode
Straight-Through Cable Pinout, I/O Controller RJ-45 Connection to
an End Station or DTE
End station
3 RxD+
6 RxD–
1 TxD+
2 TxD–
Crossover Cable Pinout, I/O Controller RJ-45 Connection to
an End Station or DTE
Hub
3 TxD+
6 TxD–
1 RxD+
2 RxD–