C4000XG modem user guide

C4000 modem front and back views

Features of the C4000XG

  • 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 status light ring 
  • Dynamic QoS: Prioritizes data through the router for smoother streaming
  • Standards-based WiFi WPA3 security

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. 

Download the C4000XG info sheet

Diagram of the C4000XG

C4000XG diagram with front light and rear ports

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.

Download the latest firmware for the C4000XG

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