Cisco Systems 7200 VXR manual 3-32, 25 Crossover or Straight-Through Cable Identification

Chapter 3 Installing a Cisco 7200 VXR Router

Connecting I/O Controller, NPE-G1, or NPE-G2 Cables

Figure 3-23

Ethernet port

1TxD+

2TxD–

3RxD+

6RxD–

Ethernet and Fast Ethernet Straight-Through Cable Pinout, Ethernet Port to a Hub or Repeater

Hub

1 RxD+

2 RxD–

6 TxD–	38582
3 TxD+

Figure 3-24

Ethernet port

1TxD+

2TxD–

3RxD+

6RxD–

Ethernet and Fast Ethernet Crossover Cable Pinout, Ethernet Port to a DTE

DTE

1 TxD+

2 TxD–

3 RxD+	38583
6 RxD–

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

H5663

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.

Cisco 7200 VXR Installation and Configuration Guide

3-32 OL-5013-09