CHAPTER
12-1
Cisco 1240 Connected Grid Router Hardware Installation Guide
OL-26223-04
12
Installing Battery Backup Units
The Cisco 1240 Connected Grid Router(CGR 1240 or router) supports up to three battery backup units
(BBUs), which provide power to the router if the router AC power supply fails or is not available. This
chapter describes the BBU features and installation procedures, and includes the following sections:
• Battery Backup Units, page 12-1
• Preparing to Install the BBU, page 12-4
• Installing a BBU in the Router, page 12-9
• Disabling and Enabling the BBU in the Router, page 12-14
• Battery Backup Unit LED, page 12-22
• Related Commands, page 12-23
• BBU Technical Specifications, page 12-33
Battery Backup Units
This section contains information about:
• Battery Backup Operations, page 12-1
• BBU Status, page 12-2
• BBU Firmware Upgrade, page 12-4
• BBU Capacity, page 12-4
Battery Backup Operations
The battery backup unit (BBU) provides the router with an emergency power source if the AC power
source is unavailable.
The router supports up to three BBU units installed at one time. The units are mounted on the router door
interior (Figure 12-1).
The total amount of time that the installed BBUs can supply power to the router depends on the
configuration of the FAR and how many BBUs are installed in the router.
The BBU can be installed in the router while the router is powered on and operating normally.
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