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Determine if Your Fiber ONT has Power and Changing the CyberPower Battery

Determine if Your ONT has Power
This guide will take you step by step to determine if the FTTP ONT has power to it.



The Optical Network Terminal (ONT) is a small network interface device that Nex-Tech has installed on the outside wall of your location. There is a power cable that goes to the inside of your home to a Battery Back-Up Unit that is plugged into a standard AC outlet. You will first want to make sure that this power cable is plugged in and getting power. The Batter Back-up Unit will supply power to the ONT if the power has gone out or if the unit has become unplugged.

To check power please locate your Battery Back-Up Unit which is pictured below.

  • Below is a picture of a Battery Back-Up Unit that is fully powered and operational on the inside of the premise. You will see how both lights are lit green.

  • Below is a picture of a Battery Back-Up Unit that has lost AC power but still has battery charge. You can see how the AC light is lit orange and the Output is lite green. Generally this means the AC power adapter has come unplugged from the wall, the AC power adapter has come loose inside the Battery Back-Up Unit, or the circuit on that outlet is not properly working. To test the outlet you can plug a lamp or any device that requires AC power.

  • Below is a picture of a Battery Back-Up Unit that the battery has come disconnected or needs to be replaced.

  • Below is a picture of a Battery Back-Up Unit that has no power. As you can see no lights are lit on this box. Generally this means the battery has no charge and the AC power adapter has come unplugged from the wall, the AC power adapter has come loose inside the Battery Back-Up Unit, or the circuit on that outlet is not properly working.

  • Norton and Almena customers may have a different power supply. Some of the customers may have a black box with no lights on it but should say Optical Solutions Inc on it. Customer's will just need to verify that this is plugged in.

How to Replace Your Backup Battery

Batteries may be found in your utility room, basement, storage room, garage, or laundry room. Make sure you remove the power from the Cyber Power unit prior to working with the battery. Norton and Almeda do not have CyberPower batteries, so these instructions do not apply to customers in those areas.

  1. Remove the battery door.
    Changing the battery 0
  2. To remove the old battery, simply release the strap holding the battery in place.
    Changing the battery 1
  3. Pull the battery out from the case.
    Changing the battery 2
  4. Disconnect the red and black wires.
    Changing the battery 3
  5. Take the new battery and reconnect the red and black wires and match them up to the red and black squares.
    Changing the battery 4
  6. Fit the battery back into place inside the case.
    Changing the battery 5
  7. Fasten the strap around the battery.
    Changing the battery 6
  8. Snap the cover back into place.
    Changing the battery 7
  9. The indicator light should go back to green.
    Changing the battery 8