Using your C844G modem

Learn about using your C844G modem/router, including features and specs, popular modem settings, and troubleshooting. You can also watch a video about controling WiFi on your C844G.

Older CenturyLink modem

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

Calix C844G modem

Features & specifications

WiFi supported:

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

The Calix 844G 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 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.

The following instructions may also apply in connecting some TVs, computers and other devices to your router's WiFi network. 


If you are trying to connect a device to your router that happens to contain "special characters" in the device name, you will need to adjust the modem settings. Follow the steps below before completing the device connection.

1. Open a web browser and type in to go to your modem user interface (GUI).

2. Log in using the "Admin Username" and "Admin Password" shown on the modem's label.

Calix C844G modem 2a
Calix C844G modem 2b

3. Select the Advanced Setup section in the main menu.

Calix C844G modem 3

4. In the left sidebar, select "DHCP Settings" under the LAN Settings section.

Calix C844G modem 4

5. Scroll down to item #4 and select "Allow Special Characters."

Calix C844G modem 5-6

6. Click "Apply" to save your changes.

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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