ARRIS / Motorola SURFboard SB5101U DOCSIS 2.0 Cable Modem Item is Modem Only. Requires Cable Internet Service. Compatible with major U.S. Cable Providers. Internet download speeds up to 38 Mbps and upload speeds up to 30 Mbps based on your Cable provider service Front-panel LEDs indicate status and simplify troubleshooting.Check with your internet service provider to determine modem compatibility 10/100 Ethernet port to connect with router or computer Specially designed architecture-allows for future upgrades