How to Reset Arris CM8200

Resetting your Arris CM8200 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 on the same side where all the ports are located. Generally reset buttons on this kind of device will just be a tiny hole that may or may not be labeled.
  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 CM8200A DOCSIS 3.1 Cable Modem

How to Activate Your CM8200

Activating your Touchstone CM8200 is super quick and easy. You’ll need to set aside around 30 minutes for most activations to ensure you’re not feeling rushed.

  1. Plug in your modem to the power supply cable, then plug the power supply cable into the wall.
  2. Plug the coaxial cable into the wall, and then screw the other end into the coaxial port on the back of the modem.
  3. Wait 5 minutes for your modem to fully boot up.
  4. Connect an Ethernet cable into the back of your modem and then plug in the other end into your computer.
  5. Open a web browser (Chrome, Firefox or Safari work best for this).
    • Cox: – type this address into the URL bar of your device.
    • Mediacom: you will automatically be redirected to the activation login page.
  6. Make sure you have your account number/account login information for your account with Cox/Mediacom and your modem’s serial number and MAC numbers handy. It’s helpful to take a picture of the bottom sticker of your modem to refer back to easier.
  7. Follow the on-screen steps to set up and activate your new modem.
  8. After set up is complete, you can now disconnect the Ethernet cable from your computer or laptop and connect it into a wireless router if you’re using one for your wireless service.

Congratulations on activating your CM8200 cable modem!

How to Install WiFi Router

The Arris Touchstone CM8200 does not have built-in WiFi. If you need WiFi for your home network, you’ll need a separate WiFi router. Installing a wireless router is generally much easier than setting up a new modem since you do not need to contact your internet service provider to get it set up. There is one exception to this: if you are currently renting a router from your provider, you’ll need to let them know that you’ve replaced it with one that you own so they can remove the rental from your account/bill.

  1. First, unbox your new router and plug it in to the power cable that it came with, plugging the other end of the power cable into the wall outlet.
  2. Next, wait a few minutes for your wireless router to boot up. You’ll know it’s finished when you see the WiFi light(s) come on on the front of the device.
  3. After your device is finished booting up, you can now connect to the wireless network or networks using the default WiFi password printed on the stickers on the back or bottom of your router.
    • You’ll be looking for the “SSID” or “Network Name” printed on your router as the WiFi name. This should show up in your wireless networks list on your WiFi-enabled device.
    • The WiFi password will also be printed on that same sticker on the back or bottom of your device. The WiFi password is usually referred to as the “Key/Passphrase” or the “pre-shared key” or some other variation of that. Please note that the password is case-sensitive, so be careful as you enter it to ensure it’s accurate!
  4. You can now enter the WiFi password discussed in step 3 to log into the wireless of your new router!
  5. Final step for installing your router is connecting it to your cable or DSL modem. All you need to do next is connect an ethernet cable going from one of the ports in the back of your modem into the WAN (grey) port on the back of your WiFi router. This will allow you to use the wireless connection of your WiFi router to access the internet.

Congratulations on connecting your new wireless router to your network!


Tips If You’re Having Trouble Getting Connected

→ I can’t find the WiFi network name printed on my device in my available networks list.

Try doing a factory reset on your wireless router! Depending on where you purchased your router or what firmware has been loaded onto it, it may just need a reset to get the network name back to the factory default that’s printed on that sticker.

To reset your device, just hold down the reset button found on the back near all the ports for about 30 seconds, then allow 2-3 minutes for your router to reboot and reset itself.

→ I can get the wireless connected but there is no internet connection.

Your best bet is to check that the cables are all connected securely and that there’s no damage or issues with the cables hooking everything together. If that does not fix the problem, you’ll need to contact your internet service provider to see if there is any issue they can see on their end.

→ My WiFi password is not working.

If the default wireless password printed on the bottom sticker of your router is not working to access the WiFi, the easiest way to fix this would be to do a factory reset on your router. You can easily do this by pressing and holding the reset button on the back of the device for 30 seconds and then allowing 2-3 minutes for your router to reboot. After the wireless lights come back on, you can then try again with the default WiFi password.

Arris Touchstone CM8200 FAQ

Does the Arris CM8200 have built-in WiFi?

No, the Arris CM8200 is just a cable modem. This model does not have a built in WiFi router. If you need WiFi, we recommend getting a separate router to handle that part of your service.

Why not just get a modem router combo?

Modem router combo devices generally have weaker WiFi signal strength and speeds since the router that is built into most modems is on the weaker side, or is hindered by interference from the other hardware. As a result, a cable modem like the CM8200 will work best when paired with a high speed wireless router.

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 Touchstone CM8200 Cable Modem? Let us know in the comments, or leave your own questions for our technicians to answer!

2 thoughts on “Arris CM8200 Cable Modem Product Manual

  1. Michael D says:

    Is the Touchstone CM8200 MOCA enabled? I am about to purchase the ScreenBeem MOCA 2.0 network adapter and don’t know if I need to get 1 or 2 of them. (If it is MOCA enabled then I only need 1 adapter to make the connection)

    1. ModemGuides says:

      Hi Michael!

      The Touchstone CM8200 is primarily a DOCSIS 3.1 cable modem and doesn’t typically come with built-in MoCA capabilities. To set up a MoCA network with the CM8200, you’d likely need two ScreenBeam MoCA 2.0 adapters: one for connection to your router and another at the desired location. Hope that helps with your issue!

      – ModemGuides Support

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