Approved for Cox, Spectrum and Xfinity internet along with other US cable internet providers. Is NOT compatible with ATT, CenturyLink, Verizon, Froniter or other Fiber Optic, DSL or Satellite internet service providers. Does NOT include Wi-Fi and Does NOT support cable digital voice service. The SURFboard SB8200 is compatible with major U.S. cable internet providers including Cox, Spectrum, Xfinity and others. It is approved for cable internet speed plans up to 1 Gbps. Check your cable ISP website to confirm compatibility. 32 downstream x 8 upstream DOCSIS 3.0 bonded channels, or 2 downstream x 2 upstream OFDM DOCSIS 3.1 channels. Two 1-Gigabit Ethernet ports