Modem User Manual

Configuration Information
Cisco uBR904 Cable Modem Installation and Configuration Guide
2-14
Note Referring to the RJ-45 pinout in Table 2-2, proper common-mode line terminations
should be used for the unused Category 5 UTP cable pairs 4/5 and 7/8. Common-mode
termination reduces electromagnetic interference (EMI).
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 2-3.
Figure 2-3 RJ-45 Cable Identification
Examine the sequence of colored wires to determine the type of RJ-45 cable:
• 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.
Configuration Information
After you install the Cisco uBR904 cable modem, verify that all the hardware is operating
properly, verify that the computer is configured for IP and DHCP services, and establish a
connection to the headend, the Cisco uBR904 cable modem will be configured by software
downloaded from the Cisco uBR7246 universal broadband router installed at the headend.
You do not need to perform any manual configuration on the Cisco uBR904 cable modem
unit itself.