Linksys DOCSIS 3.0 8x4 Cable Modem Certified with Comcast Xfinity, Spectrum, Cox (CM3008) Compatible with Comcast Xfinity, Time Warner Cable, Charter, Cox, Cablevision, and more. Requires Cable Internet Service Not compatible with: Verizon, AT&T, or CenturyLink Cable Modem only (no WiFi router) Features Intel Puma 5 chipset to achieve high-speed downstream and upstream performance 8 download and 4 upload bonded DOCSIS channels give you the most out of your existing cable broadband connection