Set up your tower modem and connect your internet service

This page provides instructions to self-install internet with any tower or box-style CenturyLink modem/router.

Technicolor C1100T

Actiontec C3000A

Zyxel C1100Z

Also works for all following models:

Actiontec * Adtran * Calix * Technicolor * Zyxel

Not the right kind of modem? Try the C4000 setup page instead.

Have you ordered new internet service or a new modem from CenturyLink, and are setting up the service yourself? There are some things you need to know before completing the self-install process. For the best results, read the full instructions below before you begin.

First, your modem will arrive in the mail on or before the date your service is scheduled to start. Look for an email with your order confirmation details and an order status tracking link. Your line should be activated no later than 5 p.m. on your start date. You may receive a notification earlier in the day to let you know that your service has been activated, and then you can start your installation. If in doubt, you may want to wait until 5 p.m. to hook up your modem.

Please note that the modem shown in the video may look different from your particular model; however, the steps will be the same. The only exception is the white C4000 router (view the C4000 setup video).

Now it's time to get your modem hooked up.

Plug the black power cord into a wall outlet and into the power port on the back of the modem.
Plug one end of the green cord into the green DSL port on back of the modem, and the other end into a working phone jack.
Finally, plug one end of the yellow Ethernet cord into one of the Ethernet ports on the modem, and the other end into your computer's Ethernet port.

Note: Your modem may look different from the one in the image, but the ports will be the same.

Note: If you are using a tablet or newer laptop, you may not have an Ethernet port on your device. That's okay. If your device doesn't have Ethernet, you can instead connect to WiFi using the SSID and security key on the bottom of the modem.

Do you have both internet and home phone service from CenturyLink?

If NO, proceed to step 4.

If you have both landline phone service (not VOIP) and high-speed internet, you will need to install DSL filters on all of your phone cords. These are essential to make sure you get the best phone and internet connection.

Plug the landline telephone cord into a filter, then plug the filter into the wall jack. The filter should be between the phone and the jack. Repeat the process for all home phones in the house.

Note: If you have cordless phones, you only need to install a filter on the phone base that plugs in to the wall jack; no filters are needed on the cordless units that only plug into an electrical outlet.

Modem plugging in with no filter (diagram)

Do not install a filter between the modem and the wall jack.

Phone and modem plugging into DSL splitter (diagram)

You may also use a splitter if you want to plug both a landline phone and a modem into one wall jack.

Have a home security system? Chat with customer service to get a technician to install a whole-home filter on the line outside your home (there is an installation fee for this.)

Filters are not included in your modem kit. If you have a landline phone and internet with CenturyLink, filters should have been included at the time of your order and will arrive in a separate package. If you did not receive filters, please chat with us.

While completing the installation process, the lights on your modem will tell you its connection status. Your modem may look different from the one in the images below, but the lights will function in the same way.

Look at the row of status lights on your modem. What color is the INTERNET light?

It's GREEN

You're finished!

Once the internet light is green, you're connected to the internet and you can get online!

It's AMBER

You need to finish your setup

If the internet light is amber/orange, this means the setup process is not yet complete or you have not yet accepted the user agreement. Use the My CenturyLink mobile app or browse to http://connect.centurylink.com, and follow the prompts to finish setup.

It's RED

If the internet light is red, this means a connection failure has occurred. Try disconnecting everything (DSL and power cords), waiting a few minutes, and repeating steps 2 and 3. If you still get a red light, you will need to chat with an agent to get further troubleshooting help.

Have questions about the other lights on your modem? Visit our detailed guide on how to read the lights on your modem to troubleshoot your internet connection.

Below are some of the most common questions and issues that customers ask as they self-install a modem.

What if all the lights on the modem are off?

It may sound obvious, but if none of the lights are coming on, it most often means something isn't fully plugged in.
Try this:

Make sure the power cord is fully and firmly plugged in on both ends: into the power port on the modem and into the wall outlet.
Make sure the outlet is live. You can test this by plugging in another electrical device, and/or try another outlet.

What if the DSL light or the main status light is red?

The red light indicates the modem isn't connecting to the CenturyLink network. This can be either because the service hasn't been activated yet, you're using an inactive jack, or there's an issue with the modem's authentication process.
Try this:

Check your order confirmation to make sure you've got the right date that your service is scheduled to start.
Wait until after 5 p.m. on the service start date to attempt setup.
Try another phone jack if one is available.
Try rebooting the modem. Unplug everything, wait a few minutes, and plug in again. This can often resolve a connection issue.
As a last resort, you can try using the reset button.

What if the main light gets stuck flickering blue?

The flickering blue light means the modem is attempting to sync (or connect) with the CenturyLink network. This process may not complete if there is an issue with the modem's built-in credentials. It's a good idea to reboot the modem by fully unplugging it, waiting a few minutes, then plugging it in and trying again. Sometimes this triggers the modem to correct a connection issue.

How long should the setup process take?

This can depend on a number of factors. The initial boot-up process can take up to 15 minutes as the modem updates firmware and syncs with the network. The remaining setup will depend on your installation method (using the My CenturyLink app or the QuickConnect site) and how quickly you go through the steps.

Can I use any jack in my home?

This can depend on the age of your home. In an older home, there may be multiple jacks, and they may have been installed by different providers over the years. It may be that only one of the jacks is hooked up to CenturyLink's network, or all of them may be active.

If you have questions we haven't answered, or if you need any additional support with setting up your modem, chat with us. We're here to help!

Was this article helpful?