How do I reboot my router?

To reset your Calix U4 router, follow these steps to restore the device to its default settings. Please note that performing a reset will erase any personalized configurations you’ve made. Here’s how you can do it:

Using the Reset Button:

  • Locate the small reset button on your Calix U4 router. This button is usually labeled “Reset” and is typically found on the back or bottom of the router.
  • Gently insert a paperclip or similar thin object into the reset button’s hole and hold it for about 10 to 15 seconds.
  • Release the reset button when you notice the router’s lights blinking or flashing. This indicates that the reset process is starting.
  • The router will automatically restart and begin restoring its default settings. This process may take a few minutes.
  • Once the router completes its reboot, you can access its settings using the default login credentials. These are often displayed on a sticker attached to the router or provided by Zentro Internet.

Using the Router’s Web Interface:

  • Open a web browser and enter the router’s IP address, which is typically “” or “” Press Enter.
  • Log in to the router’s web interface using your assigned username and password. If you haven’t personalized these settings, you can use the login details provided by Zentro Internet.
  • Navigate to a section labeled “System,” “Administration,” or “Reset.”
  • Within this section, locate an option that lets you “Factory Reset” or “Reset to Defaults.” Click on this option.
  • Confirm your decision to proceed with the reset when prompted.
  • The router will initiate the reset process and reboot itself. Please allow some time for this process to complete.
  • After the reset is done, you’ll need to set up your router anew. This includes configuring your network name, password, and any other customized settings.

For more precise guidance tailored to your specific Calix U4 router model, don’t hesitate to consult the router’s user manual or reach out to Zentro Internet’s dedicated customer support team. We’re here to assist you every step of the way.