User`s guide

Power
4.4 Battery Backup Units
4.4 Battery Backup Units
The LEDs on the BBU (see Figure 4–2) display the status of the BBU. These
LEDs are controlled by internal BBU signals. The status LED has three states:
on, off, and flashing. The charge status LED has two states: on or off. The valid
states of these LEDs are listed in Table 2–5
• The upper LED (green) is the BBU status LED.
• The lower LED (amber) is the charge status LED.
Figure 4–2 BBU LEDs
CHARGE
STATUS
(AMBER)
BBU STATUS
(GREEN)
CXO-3670A-PH
4–4 Power