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Cisco uBR924 Router Hardware Installation Guide
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Chapter 1
Product Overview
Features
Note
The backup POTS connection enables only one of the VoIP ports that can be connected to
the Cisco uBR924 to function during a power outage. Calls in progress prior to the power
outage are disconnected.
If power is re-established while a cutover call is in progress, the connection remains in
place until the call is terminated. After the cutover call is terminated, the router
automatically reboots.
Power Supply
The Cisco uBR924 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 uBR924 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 uBR924 Router,” before you connect the system to its power source.
Caution
Use only a Cisco-provided power supply and cord. Using any other vendor’s power supply
and cord can cause loss of data or permanent damage. Cisco uBR924 and Cisco uBR904
power supplies and cords are identical and interchangeable, provided the power cords are
applicable to the country of operation.
