Cisco Systems 3120 manual RJ-45 Cables

Chapter 1 Product Overview

Ports and Connectors

Figure 1-4 10/100/1000 Port Pinouts

Pin Label

1TP0+

2TP0-

3TP1+

4TP2+

5TP2-

6TP1-

7TP3+

8TP3-

1 2 3 4 5 6 7 8

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RJ-45 Cables

Cisco products use the following types of RJ-45 cables:

•Straight-through

•Cross-over

•Rolled (console)

To identify the RJ-45 cable type, hold the two ends of the cable next to each other so that you can see the colored wires inside the ends, as shown in Figure 1-5.

Figure 1-5 RJ-45 Cable Identification

H5663

Examine the sequence of colored wires to determine the type of RJ-45 cable, as follows:

•Straight-through—The colored wires are in the same sequence at both ends of the cable.

•Cross-over—The first (far left) colored wire at one end of the cable is the third colored wire at the other end of the cable.

•Rolled—The colored wires are in the opposite sequence at either end of the cable.

Cisco AVS 3120 Application Velocity System Hardware Installation Guide

OL-11805-01 1-5