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.
Red - ONT is operating off battery power;
no AC power available
Blinking Red - Battery power is low
Green - Indicates normal operation
Blinking Green - Indicates system fault
Green - Operating normally.
Blinking Green - Battery is going through a self-test.
Yellow - ONT is operating from the battery and the battery is discharging.
Blinking Red - Battery is fully discharged and needs to be replaced.
Green - ONT is operating normally. BBU is on standby.
Yellow - Battery is either recharging or conducting a self-test, or the BBU is providing power to the ONT.
Red - Battery is low. When this light comes on, approximately two hours of talk time remain.