Table 1 lists the rolled (console) cable pinouts for RJ-45. 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.Straight-through-The colored wires are in the same sequence at both ends of the cable.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 4.Įxamine the sequence of colored wires to determine the type of RJ-45 cable, as follows: Note : Cisco does not provide these cables, yet they are widely available from other sources. Use a cross-over cable to connect an MDI to an MDI port, or an MDI-X to an MDI-X port.įigure 1 shows the 10BaseT and the 100BaseTX connector (RJ-45).įigure 2 shows the 10BaseT, 100BaseTX, and 1000BASE-T connector (RJ-45).Ĭisco products use the following types of RJ-45 cables: Use an Ethernet straight-through cable to connect an MDI to an MDI-X port. Ethernet ports normally use MDI connectors, and Ethernet ports on a hub normally use an MDI-X connector. The 10/100/1000BaseT ports use standard RJ-45 connectors and support MDI and MDI-X connectors. You must use at least a Category 5 cable for 100/1000baseT operations, but a Category 3 cable can be used for 10BaseT operations. This chapter includes the following sections: This chapter describes pinout information for 10/100/1000BaseT ports, console the RJ-45 to DB-9 ports, and the Management 10/100/1000 Ethernet ports.
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