Using your Greenwave C4000 modem

Recommended CenturyLink modem

Greenwave C4000 modem

Features of the Greenwave C4000 (All versions)

  • Secure WiFi compatible
  • WiFi 6 technology with dual-band 2.4 GHz and 5 GHz 802.11ax
  • Smart Connect single wireless network (SSID): Auto-selects the fastest band for each device
  • Single LED status light 
  • Dynamic QoS: Prioritizes data through the router for smoother streaming
  • Standards-based WiFi WPA3 security

This router comes in multiple versions, each with different specifications. The one you use will depend on the type of internet connection you have. 

Works with these CenturyLink internet services:

  • ADSL/ADSL2+ – up to 40 Mbps with pair-bonding
  • VDSL – up to 140 Mbps with pair-bonding

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

Works with these CenturyLink internet services:

  • ADSL/ADSL2+/VDSL – single line up to 100 Mbps

The Greenwave C4000LG has the same specifications as the Zyxel C4000LZ

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

Works with these CenturyLink internet services:

  • Fiber (GPON) – up to 940 Mbp

 

The Greenwave C4000XG has the same specifications as the Zyxel C3510XZ

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

Diagram of the C4000LG modem

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

Important Note:  The C4000 is not recommended for use with the G.Hn WiFi/Ethernet Extender Kit and requires manual pairing. If you have a C4000 modem and would like to boost your signal, we recommend ordering a compatible WiFi extender on our Accessories Marketplace.

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. 

Introducing Secure WiFi

Secure WiFi provides automatic cybersecurity for your network and all devices connected to it, plus:

  • Manage network services
  • Manage devices
  • Pause devices
  • Create groups

 

Introducing WiFi 6

Intel WiFi 6 Gig+ 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:

  • Up to 3x the connectivity speed 
  • Up to 4x the data capacity 
  • Up to 75% less lag time (latency) for gaming and video applications

WiFi 6 also includes embedded cybersecurity, managed network services and parental controls. This feature is available with the Greenwave C4000 modem/router.

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