C3000 modem user guide

The C3000A and C3000Z are WiFi-enabled modems with built-in router, also called gateways.

C3000Z modem front view
C3000A modem front and side view

Features of the 3000A and the 3000Z

  • WiFi supported:
    • 2.4 GHz: 802.11 b/g/n
    • 5 GHz: 802.11 ac (WiFi 5)
  • IP compatibility: IPv4, IPv6

Speed specifications

This gateway is tested and certified to run up to 940 Mbps on the Quantum Fiber network. 


Note: Speeds reflect the maximum download speed the technology can deliver Quantum Fiber service. In-home speeds may differ based on router setup, devices and other factors. 

Top troubleshooting tips

  • Connection issues? Restarting your modem is a good first step to fix many common problems.
  • Tried restarting and still having trouble? Learn more about resetting the modem to its default settings.
  • Need more help? Our troubleshooting team is standing by. Contact us through your Quantum Fiber app, or by signing in to your account.