How to Activate Arris TG3482G

Activating your new Arris TG3482G is one of the easiest parts of replacing your modem! After you’ve picked out the right model for your service plan and ordered it, you can finally now activate it to get your internet up and running. Here’s our guide on the easiest way to get your device activated:

  1. Plug your new TG3482G in the same way as the device it’s replacing. If this is a new service installation, make sure that the coaxial cable has been screwed in snugly, the power cable is plugged in and that the modem has been given at least 1 hour to provision before beginning the activation process.
  2. Once your device has been plugged in, you can now move on to contacting your internet service provider to let them know you’re installing new equipment. You can either call their customer service line, or most providers have a way to self-activate your equipment online or by using an app.
  3. If you’re speaking on the phone with a representative for your activation, they will confirm with you when your internet is ready to use! If you chose to do a self-activation online, you’ll know your modem is activated when you reach the end of the prompts.

For instructions that are specific to activating with Comcast Xfinity, click here.

Congratulations! Your modem has now been activated and can be used to access the internet!

Which Providers Does the Arris TG3482G Work With?

The Arris TG3482G XB6 xFi Cable Modem Gateway is primarily used and is compatible with Xfinity Comcast service in most areas. To verify that this model will work in your area, always contact your service provider’s customer service prior to placing your order with us to confirm that this model will work with your service plan. Some service plan speeds may not be supported.

How to Reset Arris TG3482G

Resetting your Arris TG3482G is one of the easiest ways to correct almost all common technical issues that you may experience over the life of your modem. It’s a super handy tool to have in your troubleshooting repertoire and can save you hours on the phone with your provider. Here’s how it’s done:

  1. Plug your modem in to the power supply and wait 2 minutes for it to boot up fully. You’ll know it’s booted fully when the wireless lights come on.
  2. Locate the reset button on the back of the modem. It’ll be a small hole on the same side where all the ports are located directly below the coaxial port (see image below).
  3. You’ll need a flattened paperclip or pen cartridge to do this next part. Press down and hold the reset button for 30 seconds with your modem still plugged in. You should feel a small dull click when you press in the reset button with your paperclip.
  4. Now wait a few minutes for your modem to reset and reboot itself. You’ll know it’s finished and ready to use when the WiFi lights come back on.

Tip: Still not resetting? Try just holding down for 15 or 20 seconds instead of the full 30. Some firmware versions differ on the number of seconds needed for a reset.

Arris TG3482G WiFi Login

Logging into the settings admin panel of your TG3482G modem takes about 10 minutes at most, and will allow you to change the wifi name and password, as well as adjust other wireless settings for your home network.

  1. Make sure your Arris modem is plugged in and powered on.
  2. Connect a computer, laptop, tablet or smartphone to your modem via either WiFi using the default wireless network or with an Ethernet cable (Ethernet is recommended).
  3. Once you’re connected, open a web browser application on your device and type your modem’s IP address into the URL address bar at the top of the screen. The default IP address for this device is, however this may have been changed by your internet provider’s firmware if your modem was already activated. If you’re not sure what your modem’s IP address is, you can follow the instructions below to find yours.
  4. After you’ve entered in your modem’s IP address, hit enter and it should pull up either an Xfinity or Arris branded page asking for a username and password. The Arris TG3482G default username is usually admin and the password is usually password. They are case sensitive, so make sure that you’re entering them in all lower case. If they don’t work, you may need to do a factory reset to get back to default settings.
  5. After you’ve entered your username and password, hit “Login”.

Congratulations! You’ve managed to log into the settings admin panel of your Arris modem!

How to Find Your IP Address

This method works on Windows computers and does not require any software to be downloaded. You’ll be using command prompt to find the internal IP address so you can log into your WiFi router or modem router’s settings panel.

  1. Click the start menu in the bottom left of your screen.
  2. In the search bar in your start menu, type in “cmd.exe” and then click on that program when it appears in the search.
  3. When the program opens, you’ll see a black window on your screen with white text.
  4. Type into the program “ipconfig“, then hit Enter. Your window should look like the one shown below. The IP address circled below shows where your internal IP address will be on your command prompt window. Now you can move on to accessing your modem or modem router’s settings admin panel.

Did we answer all your questions about the Arris TG3482G Cable Modem? Let us know in the comments, or leave your own questions for our technicians to answer!

9 thoughts on “Arris TG3482G Product Manual & Troubleshooting Tips

  1. Mark says:

    No battery backup?

    1. ModemGuides says:

      Hi Mark!

      Yes, this model does have battery backup capability for emergency power outages. If you’re buying this from us, batteries are sold separately. Hope that helps answer your question! Thanks!

    2. ModemGuides says:

      Hi Mark,

      Yes, this model does support a battery backup, however due to shipping regulations for lithium Ion batteries, they are sold separately from the modem. We do not carry batteries for this model at this time. Please check out the manufacturer’s site for battery options.

      – MG Support

  2. Jimmy says:

    Does it have built-in MoCa

    1. ModemGuides says:

      Hi Jimmy,

      It doesn’t look like this model includes MoCa as a feature from the specification list. If you need a device that supports that feature, we recommend calling your internet service provider to find out which models they would recommend. Hope that helps!

  3. Beatriz Mejia says:

    The back of the modem keeps on flashing a white light. I have wifi, the front has the solid white light. How do I stop the back from flashing, after a year it just started today when Comcast sent signals

    1. ModemGuides says:

      Hi Beatriz,

      We need more information about which lights are flashing on the front of your modem in order to help correct this issue. Alternately, you can always call your internet provider again and speak with a different representative about what lights you’re seeing. It sometimes helps to specifically ask to be transferred to the “tech support” department.

      Hope that helps!

      -MG Support

  4. Cyrus Campbell says:

    How can I enable sharing between wi-fi and ethernet connected devices. Currently I cannot ping a device on the wi-fi network from a device on the ethetnet network.

    1. ModemGuides says:

      Hello Cyrus,

      In order to enable sharing between Wi-Fi and Ethernet connected devices, you will need to set up a network bridge between the two networks. A network bridge allows devices on different networks to communicate with each other as if they were on the same network.

      To set up a network bridge:

      1. On the Wi-Fi router, locate the option to enable bridging or LAN-to-WAN routing. This is typically found in the advanced settings or network configuration section of the router’s web-based administration interface.

      2. Enable bridging or LAN-to-WAN routing, and specify the IP address range of the devices on the Ethernet network that you want to allow to communicate with the Wi-Fi network.

      3. On the Ethernet connected devices, set the IP address to be within the range specified in the previous step.

      4. Test connectivity between the Wi-Fi and Ethernet connected devices by pinging one device from the other.

      Note that this is just one way to set up a network bridge, and the specific steps may vary depending on the make and model of your router and devices. If you are having trouble setting up a network bridge, you may need to consult the documentation or seek assistance from the manufacturer.

      Hope that helps resolve your issue!

      – MG Support

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