Motorola SURFboard SB5101 DOCSIS 2.0 Cable Modem - Non-Retail Packaging (Brown Box) When connected to a DOCSIS 2.0 or 3.0 cable network, capable of up to 38Mbps down and 30Mbps upstream Internet speeds. Specially designed architecture-allows for future upgrades Requires Cable Internet Service. Compatible with major U.S. Cable Providers. Contact your ISP to verify compatibility. Front-panel LEDs indicate status and simplify troubleshooting 10/100 Ethernet port to connect with router or computer