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Using your C2100 modem

Learn about using your C2100T or C2100Z modem/router, including features and specs, popular modem settings, and troubleshooting. You can also watch a video about controling WiFi on your C2100.

Older CenturyLink modem

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

C2100T modem
Modem setup instructions

Features & specifications

WiFi supported:

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

The Technicolor C2100T and Zyxel C2100Z gateway modems are tested and certified to run at these speeds* on the CenturyLink® Fiber Internet network:

Technology Type Tested speed
ADSL up to 7 Mbps
ADSL2+ up to 20 Mbps (40 Mbps pair bond)
VDSL up to 40 (100 Mbps pair bond)
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.

Technicolor C2100T info sheet (PDF)

Zyxel C2100Z info sheet

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.

How to read the modem lights
Connect devices to your WiFi network
Connect using WPS
2.4 vs. 5 GHz wireless frequencies
Manual WAN setup (advanced)

Learn how to access your modem settings and how you can use them to manage your network.

Modem Settings Guide

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.

Download C2100T firmware

Download C2100Z firmware

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

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