Using your C424G modem

Learn about using your C424G modem/router, including features and specs, popular modem settings, and troubleshooting. You can also watch a video about controling WiFi on your C424G.

Older CenturyLink modem

This modem is being retired — time to get a replacement!

Adtran C424G modem

Features & specifications

WiFi supported:

  • 2.4 GHz 802.11 b/g/n
  • 5 GHz 802.11 ac (WiFi 5)

The Adtran 424G gateway modem is tested and certified to run at these speeds* on the CenturyLink® Fiber Internet network:

Technology Type Tested speed
Fiber up to 940 Mbps

*Customer speed experiences will vary, particularly when accessing the internet wirelessly from different devices. Maximum download/upload speeds given are via a wired connection. Internet speeds are not guaranteed due to conditions outside of network control, including customer location, devices, equipment, and access over a wired or wireless connection; see centurylink.com/internetpolicy for more information.

Top modem settings and tasks

Learn how to manage your internet and WiFi network using your modem. Below are some of our most popular topics. You can also visit the modem settings guide for a complete overview of settings and options.

Modem troubleshooting tips

  • Did you know?  If your internet connection is spotty or slow, the best place to start is to reboot your modem.

  • Still not running right? Check to see if your modem firmware is up to date.

Tip: If the firmware link doesn't work, try another browser (Chrome is known to have issues with this kind of link). Or, right-click the link, select "copy link address", then paste the link into a new browser tab.

Video: How to control your wireless settings

Modem Recycling

Send in your old CenturyLink modem and we'll recycle it at no cost!

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