Using your Zyxel C3000Z modem

Recommended CenturyLink modem

Zyxel C3000Z modem

Features of the Zyxel C3000Z

WiFi supported:

  • 2.4 GHz: 802.11 b/g/n
  • 5 GHz: 802.11 ac (WiFi 5)

IP compatibility: IPv4, IPv6

Other features: Secure WiFi compatible

Works with these CenturyLink internet services:

  • ADSL/ADSL2+ – up to 40 Mbps pair bond
  • VDSL2 – single line up to 40 Mbps (100 Mbps pair bond)
  • Fiber (GPON) – up to 940 Mbps

Note: Listed speeds reflect the maximum speed the technology can accomodate. In-home speeds may differ based on router setup, devices and other factors.

Modem troubleshooting tips


Chrome users, right click on the firmware link below and choose "Open link in a new tab."

Quick setup

Manual network (WAN) setup

If instructed to do so by a technician, you may need to change the WAN settings on your modem manually. Visit the WAN setup page for step-by-step instructions on different WAN configurations, including PPPoE, IPoE and transparent bridging.

Your modem's wireless settings control the WiFi network in your home. This model of router has 2.4 GHz and 5 GHz options for most wireless settings, with exceptions noted below. Click on the options below for details and step-by-step instructions.

Helpful WiFi topics

The modem status area of the user interface allows you to view several options and check how your modem is running. 

  • Firewall status
  • Device table
  • NAT table
  • Routing table
  • QoS table
  • Resource table

The utilities menu gives you access to several additional tools to manage and test your modem. 

Advanced settings give you even more control over your modem's configuration. Most of these are best for tech-savvy folks who are familiar with modems and networking. 

Was this page helpful?