What the Lights Mean

Connecticut customers: If your Frontier wireless gateway is a Motorola or 2WIRE brand, read  what the blinking lights mean.

Non-Connecticut customers: If everything is working well, your BBU or PSU will have a steady green light illuminated. If not, here are some troubleshooting tips.

If your BBU or PSU has no lights illuminated then it has no power. Use another electrical device (such as a lamp or a hair dryer) to make sure the electrical outlet is working. If it is working, but your BBU/PSU has no power, please call FiOS Technical Support for assistance.

When to Reboot How to Reboot
  • If BBU or PSU has steady red light. This means it is using battery power, not electrical power.
  • If BBU or PSU has blinking red light. This means battery power is low.
  • If BBU or PSU has blinking green light. This indicates a system fault.
  • Unplug PSU/BBU from electrical outlet.
  • Remove leads connecting battery to BBU or unplug wiring harness (if accessible).
  • Wait at least 30 seconds, then plug PSU/BBU back into electrical outlet.
  • Replace battery leads or wiring harness.
  • Look for PSU and BBU lights to be on, green and steady.

If your BBU or PSU has a steady red light after a reboot then the battery may need to be replaced. Your battery has a one-year warranty from the date of FiOS service installation. If your battery is in-warranty a replacement can be shipped to you at no cost. If it is out-of-warranty, you will be responsible for replacing the battery. Please call FiOS Technical Support for assistance.

Still need help? Call 1.800.239.4430 or Live Chat

Recommended Articles

Power Supply Problems & Battery Back-up

Your service has a Battery Back-up Unit (BBU) located inside your garage or house where it can be easily monitored. If your ONT is accidentally unplugged or the power goes out, your back-up ...

Read More
Frontier Service Outage Overview

Frontier is working tirelessly to restore your services Report an outage or identify outages in your area We do everything we can to keep your services running 24/7/365, but ...

Read More
How To Troubleshoot Internet Connection Issues

If you are experiencing any of the following issues with your Frontier Internet connection, try a reboot, or let our Support Wizard guide you through the necessary steps to correct your ...

Read More