Toms guide #1 cable Modem choice 2 years in a row. Compatible with major U.S. Cable Internet Providers including Cox, Spectrum, Xfinity & others. Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providersDOCSIS 3.0 Cable Modem best for cable internet speed plans up to 400 Mbps16 downstream x 8 upstream DOCSIS 3.0 bonded channels1 Gigabit Ethernet port for connecting to a Wi-Fi router or other deviceCable internet service required. Does not inlcude Wi-Fi and does not support cable digital voice service, APROBADO con Comcast Xfinity, Spectrum (Charter, Time Warner, Brighthouse), Cox y más. Si no está seguro, llame a su proveedor de cable para averiguar si está aprobado para su uso. REQUIERE Cable Internet Service