Your Optical Network Terminal is installed with a separate Battery Backup Unit (BBU). When a fully charged 12-volt battery is installed in the BBU, you will have up to 8 hours of backup power for basic voice service, including calls to 911.
Internet and TV service will not be available during a power outage even if a fully charged battery is installed. The BBU only provides backup power for voice service.
How to stop your battery unit beeping
An alarm will sound once a minute to alert you if the 12 volt battery in the battery backup unit (BBU) it is not fully charged or has been drained completely. Your battery unit may look different from the one in the illustration below. The steps to mute battery beeping are the same for all battery backup units (BBU).
To stop the beeping
Locate your battery backup unit (BBU)
Press and hold the Alarm silence button for 10 seconds
You should either hear a loud beep or the lights will flash on and off
If you did not get a beep or flashing lights, press and hold the Alarm silence button and the emergency use button together for 10 seconds.
Note: This will reboot your BBU and clear the alarm.
Note: The reboot will temporarily disrupt all your fios services and take between 3 to 5 minutes to complete.
Battery backup unit lights and buttons
An alarm will sound once a minute to alert you if the battery it is not fully charged or has been drained completely. This will be repeated until you press the Alarm Silence button.
Alarm Silence. Press to silence the audible alarm. Battery Emergency Use. Press once to reboot the ONT and get up to 1 hour of battery life for emergency phone calls. Once pushed, all remaining battery life will be used.
Auxiliary Power Source
GREEN - auxiliary power available
RED - auxiliary power not available
RED - battery needs to be replaced
RED - ONT is operating off battery power; no commercial power available
BLINKING RED - low battery power
GREEN - normal operation
BLINKING GREEN - system fault
Disconnecting and replacing the 12 volt battery in your BBU
Important: Before you begin, unplug the BBU power from your wall outlet.
Then open the battery compartment.
Remove the plug connector with the red and black cables by pinching and sliding it out of its location.
Gently disengage the retaining clips that hold the battery in place and remove the battery.
Disconnect the battery clips from the old battery and set the battery aside for proper disposal. If you are not installing a new battery, proceed to Step 8.
Save the red and black cable for future use.
Remove the plastic covers on the black and red terminals of your new battery. Connect the battery clips to the corresponding black (- negative) and red (+ positive) terminals on the new battery.
Slide the new battery into the battery compartment , securing it underneath the retaining clips.
Insert the plug connector back into position. If the battery is installed correctly, you'll hear a beep and the battery power and system status lights will be solid green.
Replace the battery cover and plug the BBU back into your wall outlet.
Changing your battery backup
To better assist you with disconnecting and installing new batteries in your BBU, we've created a simple two minute video that can walk you through each step. Click on the video to the right to start watching.
Important: Before you begin unplug the Battery Backup Unit from the wall outlet.
Place your hand in the inset between the panels and pull the door open from right to left
Your battery is located in the top part of the unit.
How to dispose of my old battery
When replacing your battery, please make sure to dispose of your old battery properly. For more information about recycling, you can contact Call2Recycle at 1.877.RECYCLE (1.877.273.2925) or visit call2recycle.org to find a list of the drop-off locations closest to you. You may also visit http://www.ehso.com/ehshome/batteries.php or call the EPA at 202.272.0167 for instructions. Your local municipality may also have information about proper disposal of batteries.
Monitoring and maintaining the battery in your BBU
You are responsible for monitoring and maintaining your backup battery. Battery age, usage and temperature will impact battery life and performance so reducing the amount of time the batteries remain stored and unused is recommended.
Only 12-volt 7.2Ah sealed lead acid batteries should be used in the BBU. Batteries should be purchased just prior to replacement as12-volt batteries may not maintain their shelf life when stored.
Purchasing a new 12-volt battery
Only 12-volt 7.2Ah sealed lead acid batteries should be used in the BBU. Batteries should be purchased just prior to replacement as 12-volt batteries may not maintain their shelf life when stored.
You can purchase a new battery from Verizon by visiting verizon.com/fiosaccessories or you may purchase one from a third-party vendor. If you choose to purchase your replacement battery from a third-party vendor, please make sure that you are purchasing a 12-volt 7.2Ah SLA (Sealed Lead Acid) battery.