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Cisco 7200 VXR Installation and Configuration Guide
OL-5013-09
Chapter 3 Installing a Cisco 7200 VXR Router
Connecting I/O Controller, NPE-G1, or NPE-G2 Cables
Figure 3-23 Ethernet and Fast Ethernet Straight-Through Cable Pinout, Ethernet Port to a Hub or
Repeater
Figure 3-24 Ethernet and Fast Ethernet Crossover Cable Pinout, Ethernet Port to a DTE
To determine whether a UTP cable is a crossover cable or a straight-through cable, hold the two RJ-45
connectors next to each other so you can see the colored wires inside the ends, as shown in
Figure 3-25.
Figure 3-25 Crossover or Straight-Through Cable Identification
Examine the sequence of colored wires to determine the type of cable, as follows:
• Straight-through—The colored wires are in the same sequence at both ends of the cable.
• Crossover—The first (far left) colored wire at one end of the cable is the third colored wire at the
other end of the cable.
Ethernet port Hub
1 TxD+
2 TxD–
3 RxD+
6 RxD–
1 RxD+
2 RxD–
3 TxD+
6 TxD–
38582
Ethernet port
1 TxD+
2 TxD–
3 RxD+
6 RxD–
1 TxD+
2 TxD–
3 RxD+
6 RxD–
38583
DTE
