How to Reset Arris TM822G

To factory reset the Arris TM822G cable modem, follow these steps:

  1. Locate the reset button on the back of the modem. It is a small pinhole button labeled “Reset”.
  2. Using a paperclip or other small tool, press and hold the reset button for at least 15 seconds.
  3. Release the reset button after 15 seconds.
  4. Wait for the modem to reboot. This can take several minutes.
  5. The modem will now be restored to its original factory settings.

Note that resetting the modem will erase all custom settings and configurations, including Wi-Fi network names and passwords, and return it to its default settings. It is recommended that you only reset the modem as a last resort, and only if you are experiencing significant issues with its operation.

How to Login to Arris TM822G Settings Admin

To log into the settings of an Arris TM822G cable modem, you will need to follow these steps:

  1. Connect your computer to the modem using an Ethernet cable.
  2. Open a web browser and enter “” into the address bar.
  3. The modem’s login page should appear. Enter the default username and password for the Arris TM822G, which is usually “admin” for both the username and password fields.
  4. Once you have entered the correct login credentials, you will be taken to the modem’s settings page where you can make changes and view information about your modem.

Note: If the default login credentials do not work, it is possible that the modem’s settings have been changed. In that case, you will need to contact your service provider for assistance.


How to Connect a WiFi Router to Arris TM822G

To connect a WiFi router to an Arris TM822G cable modem, follow these steps:

  1. Ensure that your cable modem is connected to your broadband service provider’s network and that the Internet connection is active.
  2. Power off both the cable modem and the WiFi router.
  3. Connect an Ethernet cable from the Ethernet port on the back of the cable modem to the WAN or Internet port on the back of the WiFi router.
  4. Power on the cable modem and wait for it to fully boot up.
  5. Power on the WiFi router and wait for it to fully boot up.
  6. Connect your computer or other device to the WiFi network created by the WiFi router.
  7. Open a web browser and navigate to the router’s default gateway IP address (this can typically be found in the router’s documentation).
  8. Log in to the router’s web interface using the default username and password (again, these can typically be found in the router’s documentation).
  9. Follow the on-screen instructions to configure the router’s settings, including setting up the WiFi network name and password.

Once these steps are completed, your WiFi router should be connected to your Arris TM822G cable modem and providing wireless network access to your devices.

How to Install a Backup Battery in Arris TM822G Cable Modem

To install a backup battery in the Arris TM822G Cable Modem, follow these steps:

  1. Purchase a compatible 8-hour backup battery, such as the Arris BPB044S or the Ultralast UL-BPC2.
  2. Locate the battery compartment on the bottom of the modem.
  3. Remove the battery compartment cover by pressing the latch and sliding the cover off.
  4. Insert the battery into the compartment with the positive (+) and negative (-) terminals matching the markings inside the compartment.
  5. Replace the battery compartment cover by sliding it back into place and pressing down until it clicks.
  6. Connect the modem to a power source and allow it to charge the battery for at least 24 hours before using it.

Note that the battery is only intended to provide power to the modem during a power outage and should not be relied upon as a primary power source. It is recommended to test the backup battery periodically and replace it every 2-3 years to ensure optimal performance.

Arris TM822G Troubleshooting Tips

TM822G Internet Not Connecting?

If your Arris TM822G cable modem is not connecting to the internet, you can try some troubleshooting tips such as checking your cable connections, power cycling the modem, resetting the modem, checking for service outages in your area, or contacting your internet service provider for assistance. It may also be helpful to review the modem’s user manual for additional troubleshooting steps specific to your device.


Did we answer all your questions about the Arris TM822G Cable Modem? Let us know in the comments, or leave your own questions for our technicians to answer!

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