Battery Backup Unit (BBU) Indicator Lights You have received one of the following BBU models as part of your Verizon FiOS installation. Please look at the photos to determine which model you have.
Models #1 and #2
The models above use a combination of lights and buttons to signify certain conditions, as described below:
Battery Emergency Use - To protect you in an emergency, if an active battery is installed in the BBU, the BBU will shut down approximately one hour before the battery is fully depleted. If you need to make a phone call, press the Battery Emergency Use button once. This will enable the ONT to reboot, and provide you with up to one hour of battery life for emergency calls. After the button is pushed, all remaining battery life is used.
Alarm Silence - Press this button to silence an audible alarm.
See Also: BBU Audible Alarms