This page is for CenturyLink modems that look like this:
For the following models:
Axon C4000BG * C4000LG * C4000XG * Zyxel C4000BZ * C4000LZ
The C4000 series modem/WiFi router comes in two models, each with different specifications. The one you use will depend on the type of internet service you have.
Regardless of the specific model, the status LED ring on the front of the modem will function in the same way. This single status light replaces the multiple lights (Ethernet, Internet, WAN, etc.) found on earlier modems. If you have a C4000BG/BZ or LG/LZ model, you will also see a DSL status light on the back of the modem.
The status light ring may change colors repeatedly as it goes through the initial installation process.
While the C4000 initially boots up, it will blink blue while it is looking for the CenturyLink network. It should turn solid BLUE once it has connected.
Troubleshooting tip: If the light blinks blue for more than 5 minutes, check to make sure the green DSL cord is firmly plugged in to both the modem and the wall jack. If it blinks blue again for more than 5 minutes, service is not connected to that jack. Please try another jack or chat with us for further help.
After completing the syncing and setup process, the LED color will change to indicate the connection status:
The C4000BG/BZ and LG/LZ models also have one or two DSL status lights beneath the ports on the back side, as seen in the photo. These lights will flash red and green while the modem is syncing with the network.
The DSL light turns GREEN
The status light ring on the front will also display different behaviors at certain times, depending on the state of the modem. You will see it change when you are pairing a device to your WiFi network through WPS, as well as when the modem is updating its firmware.
WiFi Protected Setup (WPS) is an easy way to connect devices to your WiFi network. You simply push the WPS button on the modem, then select the correct network from your compatible device and it will connect without entering a password. Below are the status light behaviors you'll see when the modem is connecting (also called pairing or syncing) with a wireless device through WPS:
LIGHT COLOR - WPS connection status
BLINKING GREEN - Searching for a device and attempting to connect
SOLID GREEN - The device is connected
BLINKING RED - An error occured or the attempted connection failed. Try again, and make sure you are selecting the correct network name (SSID) printed on your modem label.
Note: The light ring will reset and return to solid GREEN after 2 minutes if it fails to pair with a device. Once it turns green, you can try pressing it again to connect.
Firmware is the software programmed into your modem that makes it run. Occasional updates are necessary to add new features and keep the modem's performance at its best. Below are the status LED behaviors you'll see when the modem is installing a firmware update:
LIGHT COLOR - Firmware status
BLINKING AMBER / WHITE - Manual firmware upgrade in progress (you are running a firmware update through the modem's settings interface)
BLINKING AMBER / GREEN - Automatic firmware upgrade in progress (the network prompted an update, typically runs in the middle of the night)
If the main LED or DSL status light on your C4000 exhibits different behavior, or indicates a problem based on the guides above, then there may be an issue with the network or with your equipment. Here are some things to try:
If the problem continues, contact technical support for help.
WiFi 6 is the next generation in-home WiFi technology, designed for the ever-increasing demand of connected homes and gigabit connections. Compared to WiFi 5, it delivers:
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