Call for the Best Cable, Phone and Internet Deals: Phone icon 1-855-349-9310

Phone icon Call Now

Getting an internet service is one thing, but getting the right equipment for that connection is a whole other problem. It’s difficult to understand how these connections and devices differ and why there are so many terms and conditions you need to go through and check before you finally purchase a modem. Secondly, that device might only be good for that one connection and not any other, in case you choose to switch ISPs. It’s quite a hassle basically.

However, you can’t just ignore it or not try to understand it, right? You have to be able to understand the basics, at least. We all know that the modem is needed to connect your home to the internet and the router is then responsible for keeping your devices connected to the internet. Besides this, what else do we know about modems and routers? Specifically, what does it mean if a modem light starts to blink or changes colors?

Today’s blog is written with the sole intention of being able to understand these things better. Our focus today is specifically on the CenturyLink C4000 modem and router.

First, let’s talk about the appearance of the CenturyLink C4000 modem. Appearance-wise, the modem has a simple or minimalistic look about it, since there is only one LED ring on the front of the modem. This is unlike the design of the previous modems, which had multiple lights on the front. As for the features of all versions of this modem, the CenturyLink C4000 has Wi-Fi 6 technology with dual-band 2.4 GHz and 5 GHz. It is also compatible with Secure Wi-Fi which protects your home network and all the other devices connected to it.

There are different versions for different internet connection types. This means the specifications for these versions will also differ from each other. So, if you are getting a modem for your CenturyLink internet plan, be sure to check which modem is meant for which connection type and then make the purchase.

There are three different versions or models of the CenturyLink C4000 modem. As we mentioned above, the model of the modem differs depending on the CenturyLink internet plan or connection you are getting. Check out the models and their recommended internet connection types below:

  • C4000XG – Fiber
  • C4000LG – DSL
  • C4000BG – Bonded DSL

In order to understand the modem, you need to understand the light. The modem communicates with you via its LED light and lets you know whether the connection is okay, weak, not there at all, etc. Note that the light function works the same for all models. Now, let’s take a look in detail at the colors and what they mean:

  • When you connect the modem and it is starting, the light will change colors and continuously flicker. So, flickering and changing light means it is in the boot-up phase.
  • Once the light stops changing color and remains blue but still flickers, then that means the modem is searching for a network.
  • The light turns solid blue and stops flickering once the connection is established.

This is only the set-up process and it will take at most 5 minutes. If something is wrong with the connection, you will have to double-check the wires and everything before trying again.

  • Once the internet connection is established, the light will turn green and you can check this by connecting your devices to the network.
  • If the light turns amber or orange instead of green, it means that the connection process is incomplete. Maybe you missed something or do not understand what to do and in that case, you can go to the MyCenturyLink app and seek help there or you can even go to the official website and just seek help from there.
  • The light will turn red instead of green or orange to show a connection failure. To solve this problem quickly, you will have to reboot the modem. Disconnect the modem from the power source and wait for a minute before connecting it again.
  • If the light is still red, you should try some of the troubleshooting steps that you can find on CenturyLink’s official page.
  • The light may change colors while you are connecting a device to the internet so there’s no need to panic.

You can connect your device to the internet via Ethernet, by selecting your network name and entering the password, and also via WiFi Protected Service or Setup. When you use WPS to connect to the internet, you don’t need to enter the password. Here’s how you do it. First, press the WPS button on your router, and then select the name of your network. You will be connected right away.

  • LED light will be green when the modem is searching for a suitable network.
  • The light will become solid green once the connection has been established.
  • If the connection fails, the light will turn red and then eventually green, after a few minutes. When it turns green, you can try to connect your device once more. Just be sure to double-check the network name and everything, so that you’re not stuck for a long time.

Updates for the modem happen automatically and without you realizing it. These are known as firmware updates. They can take up to 20 minutes to install properly.

  • The ring light will turn orange and green for the duration of the updates.
  • If you manually selected to update the modem, the lights will blink orange and white.

Keep in mind that if 20 minutes have gone by and the light is still blinking, you will need to reboot the modem. If even then, the problem persists and the light doesn’t change after 20 minutes, then you should consider calling CenturyLink for help.

The ring light is not the only light you need to be worrying about. There are additional lights present on the back of the modem. If you have purchased the C4000BG or C4000LG models, then you will see a DSL light present behind the modem.

  • This light will flash red and green when trying to establish a connection. Once the light turns green, it means that the internet has been connected. If it turns red, the provider network is not detected by the modem.

Every time you run across a problem, it doesn’t mean that there is something wrong with the modem, rather you should check for any loose wiring or whether the internet service has been activated. If you still face the problem, just contact CenturyLink technical support at 1-855-349-9310 and they will help you through it.

  • If the DSL light is off, it means nothing is connected to the modem. Check that the jack is properly connected and that all the other connections are also in place and secured. If needed, you should remove and then reattach the plug.

Concluding the Topic

So, that was your guide on the CenturyLink C4000 Modem and its lights. Now you know how to read and understand the modem and what it is asking for. Whether you go for CenturyLink fiber service or DSL service, you will have more than just an idea of what to do after reading this blog. Of course, the only question or doubt that remains now is, which internet plan do you sign up for?

Frequently Asked Questions (FAQs)

What color should the lights be on my CenturyLink modem?

The light should be a solid green when it is connected to the home network. If it is red or orange, it means there is a connection failure. To learn more about the modem, contact CenturyLink customer support at 1-855-349-9310.

Are the CenturyLink C4000 modems for fiber internet or DSL internet?

CenturyLink C4000 modems have different models for fiber and DSL internet. The operation of both is pretty much the same with a few exceptions. If you want to know exactly how they differ, you can reach out to us at 1-855-349-9310.