C5500XK SmartNID user guide

C5500XK modem bottom view

Features of the C5500XK

  • The C5500XK combines the functions of a modem and a fiber-optic network terminal into one device. It decodes the optical signals that make your fiber internet work.

  • This device will be permanently installed (attached to the wall) inside your home or small business. Do not remove it if you move or cancel service.  

  • For WiFi coverage, this device must be paired with 360 WiFi or your own router.

Speed specifications

The C5500XK SmartNID is tested and certified to run at speeds up to 940 Mbps on the Quantum Fiber network. 


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

Installation of a C5500XK

A Quantum Fiber technician will install the SmartNID in your property by attaching it to the wall and carefully connecting it to our fiber network. As a network terminal, it should remain in place even if you move or cancel service.  

C5500XK modem with wall mount on back
C5500XK installed with 360 WiFi pod
bottom view of C5500XK smartNID

NOTE: If you have a wall-mounted C5500XK or C6500XK SmartNID, please be careful when restarting. Do not unplug the green wires on the bottom of the device. These are part of the fiber connection and should not be disconnected.