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How to purchase and install a voice modem


How to purchase and install a voice modem



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The all-in-one Arris SVG2482AC

This device handles voice, Internet, routing and Wi-Fi. This all-in-one type of device is commonly referred to as a gateway. The SVG2482AC is one of the highest performers of the group with 24x8 channels (down/up). This device can be activated across Comcast's entire footprint.Screenshot 2017-04-20 at 4.58.31 PM.pngArris SVG2482AC




The NETGEAR C7100V (24x8) is an all-in-one device similar to the Arris SVG2482AC. The Netgear CM500V (16x4) does not have a built-in router.Screenshot 2017-10-31 at 12.23.10 PM.pngNETGEAR C7100VScreenshot 2018-01-04 at 4.17.47 PM.pngNetgear CM500V




The all-in-one Arris TG862G

This device handles voice, Internet, routing, and Wi-Fi. This device can be activated across Comcast's entire footprint.


tg862g-ct.JPGArris TG862G

Those that may need better router/ Wi-Fi performance may wish to use their own router. You must disable the router/ Wi-Fi capabilities of the TG862G before you can use your own router. This is known as putting the gateway into bridge mode. Bridge mode can be accomplished by following the directions found here.




The Arris TM822G

This device handles voice and internet. It does not have a built-in router. 


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  1. Unplug your old device from the coaxial outlet and plug your new gateway into that same outlet. 
  2. Connect the power connector to the new modem and electrical outlet.
  3. Connect the phone connector (RJ11) to the new modem (TEL1 port).
  4. Wait for the modem to come online. The lights on the modem will let you know when it is online. It may take a few minutes to connect the first time.
  5. Once the modem is online, connect your computer.



Before you start, make sure your account number and telephone number are readily available. This information can be found on your monthly statement or order confirmation e-mail.


  1. Open a web browser. You should automatically be directed to the XFINITY Activation page. If not, please go to
  2. Enter the account information and additional details for which you are asked via the webpage.
  3. After entering the appropriate information, activation will be complete.

If the online activation does not succeed, call customer support: 1-800-COMCAST (1-800-266-2278) or 1-800-XFINITY (1-800-934-6489)


[Updated 2/10/18 by nerdburg]


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