Specifications

Overview 1-5
12E/2FE Port Adapter Receptacles, Cables, and Pinouts
Figure 1-5 Crossover Cable Pinout, 12E/2FE RJ-45 Connections To a Hub
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 1-6.
Figure 1-6 RJ-45 Cable Identification
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.
• 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, and the second colored wire at one end of the cable is the sixth colored
wire at the other end of the cable.
• Category 5 UTP crossover or straight-through cables with RJ-45 connectors. Connect
10/100-Mbps 12E/2FE interfaces (port 0 and port 1) to a hub using crossover cables or to an end
station using straight-through cables.
Note Category 3 and Category 5 UTP cables are not available from Cisco Systems; they are
available from commercial cable vendors.
• Your own ESD-prevention equipment or the disposable grounding wrist strap included with all
upgrade kits, FRUs, and spares.
Ethernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
3 TxD+
6 TxD–
1 RxD+
2 RxD– H10417
Hub
H5663