Zyxel C1100Z Product Manual

Welcome to our Zyxel C1100Z product manual and installation guide page. Here, you’ll find all the information you need to set up and use your C1100Z modem, including step-by-step instructions, troubleshooting tips, and detailed product specifications.

Our goal is to provide you with a comprehensive resource that not only helps you get your modem up and running quickly, but also allows you to get the most out of its advanced features and capabilities. Whether you’re a tech-savvy user or a newcomer to the world of networking, our product manual has got you covered.


How to Reset Zyxel C1100Z

Resetting your Zyxel C1100Z is one of the easiest ways to correct almost all common technical issues that you may experience over the life of your modem. It’s a super handy tool to have in your troubleshooting repertoire and can save you hours on the phone with your provider. Here’s how it’s done:

  1. Plug your modem in to the power supply and wait 2 minutes for it to boot up fully. You’ll know it’s booted fully when the wireless lights come on.
  2. Locate the reset button on the back of the modem. It’ll be on the same side where all the ports are located. Generally reset buttons on this kind of device will just be a tiny hole that may or may not be labeled.
  3. You’ll need a flattened paperclip or pen cartridge to do this next part. Press down and hold the reset button for 30 seconds with your modem still plugged in. You should feel a small dull click when you press in the reset button with your paperclip.
  4. Now wait a few minutes for your modem to reset and reboot itself. You’ll know it’s finished and ready to use when the WiFi lights come back on.

Tip: Still not resetting? Try just holding down for 15 or 20 seconds instead of the full 30. Some firmware versions differ on the number of seconds needed for a reset.

How to Change WiFi Password on Zyxel C1100Z

Here are the steps to change the Wi-Fi password on the Zyxel C1100Z DSL modem:

  1. Access the modem’s web interface: Open a web browser and enter the modem’s IP address ( in the address bar. This will take you to the modem’s web interface.
  2. Login: Enter the default username and password to access the modem’s configuration page. The default username is “admin” and the default password is “password”.
  3. Go to the wireless settings: Navigate to the wireless settings page, typically under the “Wireless” or “Wi-Fi” section of the modem’s configuration page.
  4. Change the password: In the wireless settings page, look for an option to change the Wi-Fi password. Enter the desired password and save the changes.
  5. Verify the change: After saving the changes, verify that the password change has taken effect by connecting to the Wi-Fi network using the new password.

Note: The exact steps may vary slightly depending on the specific firmware version of the Zyxel C1100Z modem. If you encounter any issues during the process, it is recommended to contact the manufacturer’s support for assistance.

How to Activate the C1100Z with CenturyLink

Here is a step-by-step guide to setting up the Zyxel C1100Z modem with CenturyLink:

  1. Unpack and plug in the modem
  2. Connect the phone cable to the wall jack and modem’s “DSL” port
  3. Connect the Ethernet cable to your computer and one of the modem’s Ethernet ports
  4. Turn on the modem and wait for the power and internet lights to stabilize
  5. Open a web browser and access the modem’s web interface (
  6. Login to the modem’s configuration page using the default username (admin) and password (password)
  7. Call CenturyLink customer support and provide the modem’s MAC address for activation
  8. Verify your account information and wait for the modem to be activated on CenturyLink’s network
  9. Check for internet connectivity by visiting a website
  10. Contact CenturyLink customer support if you encounter any issues or are unable to access the internet.

How to Set C1100Z to Bridge Mode

Setting the Zyxel C1100Z modem to bridge mode allows it to act as a simple pass-through device, forwarding network traffic between your router and your internet service provider. This can be beneficial for a variety of reasons, including:

  1. To use a third-party router with more advanced features and customization options
  2. To extend the range of your existing wireless network by connecting an additional router to the modem
  3. To improve network performance and stability by allowing multiple devices to connect to the modem and receive internet access.

To set the Zyxel C1100Z modem to bridge mode, follow these steps:

  1. Log in to the modem’s web interface by accessing in a web browser
  2. Go to the “Advanced Setup” section of the modem’s web interface
  3. Select “Bridging” under the “DSL” tab
  4. Change the “Bridge Mode” setting to “Enabled”
  5. Save your changes and restart the modem

After restarting the modem, it should be functioning in bridge mode and forwarding network traffic to your router.

Did we answer all your questions about the CenturyLink Zyxel C1100Z DSL Modem? Let us know in the comments, or leave your own questions for our technicians to answer!

2 thoughts on “Zyxel C1100Z Manual & Installation Guide

  1. Steve Ashcraft says:

    How do you get the MAC Address for the CenturyLink Zyxel C1100Z DSL Modem?

    1. ModemGuides says:

      Hi Steve,

      To find the MAC address on a CenturyLink Zyxel C1100Z DSL Modem, check the sticker on the back or bottom of the device where it’s usually printed. Alternatively, log in to the modem’s web interface by going to or in your browser. Use the default username and password found on the device’s sticker. Once logged in, navigate to the Status or Information tab to find the MAC address listed there.

      Hope that helps!

      – ModemGuides Support

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