How to Reset Your Arris TM822

Resetting your modem is an important tool to troubleshoot problems with  your network and can save you from needing to call out a technician from your service provider. Luckily, the Arris TM822A is one of the easiest models to troubleshoot since it’s interface is so simple to operate. Here’s our guide to easily factory resetting your Arris TM822A:

  1. First, ensure your modem is plugged into the power supply and that it’s fully powered on.
  2. Locate the reset button on the back of your modem, to the right of the phone ports.
  3. Press and hold the reset button in with a pen cartridge or paperclip for 20-30 seconds.
  4. Release the reset button and wait 3-5 minutes for your modem to power cycle and reboot.
Arris Touchstone TM822A Gateway Telephony Cable Modem

Arris TM822A WiFi Setup

The Arris TM822A is a DOCSIS 3.0 cable modem with telephone built-in. Unfortunately, this model does not feature built-in WiFi. Most of our customers choose to use this model with a separate router to handle the WiFi part of their service. Luckily, choosing a router is very easy, since this model is compatible with virtually all routers on the market. We recommend getting on that’s Dual-Band, and supports wireless speeds of at least 400 Mbps, for best results.

Once you have a wireless router to connect to your Arris TM822, you can connect it by either following our guide on that specific router, or you can follow this generalized installation guide which works for most routers. Here’s how to set it up:

  1. Plug in your router to the power supply cable, and then plug an Ethernet cable going into the back of your router’s WAN port and the other end of that Ethernet into the back of your TM822.
  2. Most routers will come with a sticker with all of your WiFi credentials printed on it. Once your router has fully booted up, you should see the “Network Name (SSID)” listed among your available wireless networks. You can connect to it, and then enter either the “key”, “WiFi password” or “Pre-Shared Key” as your WiFi password to connect.
  3. Test out your connection by opening up a webpage on your computer or mobile device to test it out. If you’re not seeing any new networks appear that match the network name listed on your new router, you may need to restart your devices in order for the new network to show up.

Arris TM822G Battery Backup

There are several different versions of the Arris TM822, and each one has slightly different features. The main two that are available for residential (non-rental) use are the TM822A and the TM822G. Both of these models have 2 built-in phone lines and features a very similar array of features. However there are two defining differences between the two models: Compatibility & Battery Backup options.

The TM822G features a battery pack option which allows you to stay connected to telephone service for a period of time after losing power. This can be a life-saver as it would allow you to be able to call for help in the event of an emergency, and gives the peace of mind that you’ll be connected at all times. The battery options include a few different sized batteries – 8hr and 12hr being the most readily available. If you need more time than the provided options, our technicians recommend getting an external battery / surge protector combo. This model does have different compatibility than the TM822A as well. The G version of this model works primarily with Comcast & Mediacom services, however it can also be provisioned with some smaller US-based ISP’s.

The TM822A does not feature the same battery backup options that the TM822G version does. In fact, you’d need to invest in an external battery for your modem to stay on during a power outage. There are many available in different sizes that would serve this purpose. This model has different compatibility than the G version as it is almost exclusively used with Optimum cable and other smaller providers. You should always call your provider to confirm that this specific model will work with your service before ordering to ensure it will be a good fit for not just your internet plan and speeds, but also that it will be able to activate on their network.

Did we answer all your questions about the Arris TM822 Cable Modem? Let us know in the comments, or leave your own questions for our technicians to answer!

2 thoughts on “Arris TM822 Product Manual – Cable Modem Manuals

  1. Alan Snow says:

    I have an Arris TM822 cable modem supplied by my cable company. I’m preparing to purchase this mesh router: ASUS ZenWiFi AX (XT8). The user’s set-up manual for this mesh router states to connect the router to your OPTICAL modem with a network cable. Why optical? I’m not sure what this means or whether the TM822 modem is optical or not. Also not sure if my TM822 will work with the ASUS ZenWiFi AX (XT8) router even if it’s not an optical modem. I’ll appreciate your response. Thank you! Alan Snow email:

    1. ModemGuides says:

      Hi Alan,
      Since we don’t carry that router, I’m not really familiar with it, but to me it looks like the manual may have a typo. From my understanding, you should be able to connect up to the TM822A just fine as you would normally. I’d just follow the install instructions as shown in the manual and disregard that line about the optical thing. If you’re having trouble setting it up, you can always call up your internet provider and they can run a diagnostic to give you more information about what the issue may be.

      Best of luck!

      MG Support

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