Modem and Router Support


Select your modem/router to view settings and features

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Find the model number on your modem sticker

Check the sticker on the back or bottom of the modem to find your model name and number.

Sticker label on tower modem
C4000 modem label


Technicolor C1100T modem

Technicolor modems



Install your modem and connect your internet

Setting up a new modem or new internet service from CenturyLink? Choose the type of modem you have to view a setup video and written instructions.

C4000 front & rear view

For the following models:
Greenwave C4000BG  *  C4000LG  *  C4000XG  *  Zyxel C4000LZ


top tower modems

For all following models:
Actiontec   *   Adtran   *   Calix   *   Technicolor   *   Zyxel (except C4000)

Connect devices to your WiFi network

Top modem troubleshooting tips

Slow or spotty internet connection? The best place to start is rebooting your modem/router.

Is your firmware up to date? Modems usually update themselves, but you can check the settings to see if there's an upgrade available.

Tried the above and still having trouble? In more severe cases, a modem reset can solve the problem.


How to read and troubleshoot the modem lights

Depending on the model of CenturyLink modem/router that you have, the lights will function a bit differently. Choose the correct guide to help you understand what the status lights tell you and how to use them to troubleshoot your internet connection.

C4000 status light ring.png

For the following models:
Greenwave C4000BG  *  C4000LG  *  C4000XG  *  Zyxel C4000LZ


image of C3000A

For all following models:
Actiontec   *   Adtran   *   Calix   *   Technicolor   *   Zyxel (except C4000)

Advanced modem settings

Please proceed with caution! The advanced options and settings on your modem are for experienced users only. Our how-to articles provide basic instructions. In most cases, you do not want to change these settings unless you have advanced knowledge of networking or are advised by a technician.

Note:  Screenshots shown in our how-to articles may differ slightly from your modem's particular settings. Features may be different from model to model, and differences are noted where possible.

Modem support videos

How to set up your C4000 modem

How to set up your tower-style modem

Guide to the modem lights (tower-style modems)

Guide to the modem lights (C4000 series)

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