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Cisco uBR905 Router Hardware Installation Guide
OL-0598-01 (9/2000)
Chapter 1
Product Overview
Physical Description
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If the router is configured for routing mode, up to four CPE devices can be directly connected
to the router’s Ethernet ports.
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If the router is configured for routing mode, an Ethernet hub can be connected to one of the
router’s Ethernet ports. The hub can then in turn be connected to any number of devices.
Note
For network performance reasons, Cisco recommends a maximum of 16 CPE
devices in either bridging or routing mode. The service provider may also set a
different limit by changing the MAX CPE parameter in the DOCSIS configuration
file—the default MAX CPE value is one CPE device, which applies in both
bridging and routing modes.
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Console port connector—Provides access to the router’s command-line interface (CLI). See the
Cisco uBR905 Cable Access Router Software Configuration Guide for more details on using this
port and giving CLI commands.
Note
The Cisco uBR905 cable access router ships from the Cisco factory with the
console port enabled. By default, downloading a Cisco IOS configuration file
disables the console port and erases all previously saved configurations. This
default behavior prohibits configuration access at the remote site.
Power Supply
The Cisco uBR905 cable access router uses an external AC-input power supply. Refer to Table A-1 in
Appendix A, “Technical Specifications,” for the AC-input power supply power specifications,
including input voltage and operating frequency ranges.
The Cisco uBR905 cable access router does not contain a power switch. After the cable system
technician installs, connects, powers on, and initializes the unit, it is intended to remain connected to
the broadband network when operating normally.
The same power supply supports both domestic (U.S.) and international operation. Different power
cords are required, however, depending on the country of operation.
Warning
The router is designed to work with TN power systems. TN power systems have a
protective earth. Read the installation instructions in Chapter 3, “Installing the
Cisco uBR905 Router,” before you connect the system to its power source.
Warning
Never defeat the ground conductor or operate the equipment in the absence of a suitably
installed ground conductor. Contact the appropriate electrical inspection authority or
an electrician if you are uncertain that suitable grounding is available.
Caution
Use only a power supply and cord provided by Cisco. Using any other vendor’s power
supply and cord can cause loss of data or permanent damage.
