Network upgrades - Vectoring
Check modem firmware

To access the most up-to-date firmware version:

  1. Log in to your modem's user interface at 
  2. Select Utilities on the main screen, then select Upgrade Firmware in the left sidebar
  3. The tool will show you if a newer version is available, and allow you to download and install from there if needed

For more advanced users, you can download the current firmware for your modem from the table below, then install it through the user interface.*


Tip: If the download link doesn't work correctly, try another browser, OR right-click the link, select "copy link address", then paste the link into a new browser tab.

tower modem sticker - make and model

You can find the name of the manufacturer and model number printed on the sticker attached to the side, back or bottom of the modem.

Modem Firmware Link

Actiontec C1000A


Actiontec C1900A
Actiontec C2000A CAH006-31.30L.95
Actiontec C2300A CAS001-31.165L.11
Actiontec C3000A CAD002-31.165L.4
Actiontec PK5000 QAP002-
Actiontec PK5001A CAP002-10.0.29
Actiontec Q1000
Adtran C424G CAO001-
Calix C844G CCO004-11.1.600.8
Greenwave C4000BG CGB001-
Greenwave C4000LG CGL007-
Greenwave C4000XG CGX008-
Technicolor C1100T
Technicolor C2000T
Technicolor C2100T
Zyxel C1000Z
2-step upgrade package required. Please update firmware through your modem's online settings portal.
Zyxel C1100Z
Zyxel C2100Z
Zyxel C3000Z CZD005-
Zyxel C3510XZ CZX001-
Zyxel C4000LZ CZL001-
Zyxel FR1000Z CZF003-
Zyxel PK5000Z QZP004-
Zyxel PK50001Z CZP004-
Zyxel Q1000Z

* Table updated 9/15/2021

What if my modem is bridged?

In rare situations, some customers have bridged their modems. If you can't access your modem by entering into your browser: 

1. Press the reset button on the back of your modem using a paper clip (or other small object) until the power light turns red. 

2. Wait for the internet light on the front of the modem to turn green (5-7 minutes). Now open up a browser and finish setup following the default configuration. 


3. Check your modem's Utilities menu for the latest firmware version. You will be able to upgrade from there if needed. 


4. If you want to bridge your modem after the firmware upgrade:

  • Go to the modems and routers homepage.
  • Select the make/model of your modem to go to the page specific to that modem.
  • Find the "Advanced Options" section, then click the link to WAN Settings.

What if I don't see my modem listed?

If you are a CenturyLink internet customer and your modem isn't listed above, contact us to ask about an upgrade to a newer model.

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