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!

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

If your internet connection is spotty or slow, try restarting your modem.
If a restart doesn't work, try our online Troubleshooter.
You might need to do a factory reset.
Chat with us for further assistance.

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.

Set location by ZIP Code

Using your C2100 modem

Features & specifications

Top modem settings and tasks

Modem troubleshooting tips

Video: How to control your wireless settings

Top Modem Topics

Top Internet Topics

Set location by ZIP Code

Using your C2100 modem

Features & specifications

Click to see speed details

Top modem settings and tasks

Modem troubleshooting tips

C2100T firmware

Video: How to control your wireless settings

Top Modem Topics

Top Internet Topics