Cisco UBR10012 Quick Start Manual page 48

Connecting Cables
Figure 25
Pin 1
Pin 2
How to identify
a crossover cable
Auxiliary Port
The auxiliary port provides a connection for a modem to allow remote access to the router and its
command-line interface (CLI). To connect the auxiliary port to the crossover cable:
Step 1 Connect one end of the RJ-45 crossover cable to the serial RJ-45 port (labelled AUX) on the PRE module
(see
Step 2 Run the other end of the crossover cable through the square hole at the front on the left side of the
chassis, and connect it to the RJ-45-to-DB-25 adapter.
Connect the adapter to the serial port on the modem to complete the auxiliary port cable connection.
Step 3
Connecting Ethernet Network Management Cables
The PRE module provides an Ethernet port to a LAN for a 10BASE-T or 100BASE-T connection for
network management.
The PRE module also contains an internal Ethernet interface (ethernet0/0/0) that it uses for inter-module
Note
communications. This interface is invisible and transparent for normal operation. Do not confuse this
internal interface, which is not user-accessible or user-configurable, with the PRE module's external Fast
Ethernet interface (fastethernet0/0/0) of the PRE module.
Each PRE module needs an Ethernet port connection (typically to the same Ethernet hub) if you are
Note
running a redundant configuration in the chassis. However, only the active PRE module has an active
Ethernet connection to the network.
Cisco uBR10012 Series Universal Broadband Router–Quick Start Guide
48
Console and Auxiliary Port Connection on the PRE Module
Pin 3
Pin 6
Figure 25).
C IS C O
10 00 0
Console port Auxiliary port
C IS C O
10 00 0
Crossover cable to
DB9 or DB25 connector
OL-24972-01