The SURFboard SB5101U Cable Modem DOCSIS 2.0 is designed for easy set-up via USB or Ethernet. Troubleshooting is a breeze too, thanks to front panel status indicator LEDs and an online diagnostics page. Compatible with Windows, Mac, more. Note: Ask your cable company if they support DOCSIS cable modems. DOCSIS (Data Over Cable Service Interface Specification) is the industry standard for cable-based Internet access service.