I have went through 2 of these modems in the past 9 months. They are just a waste of money. There is no warranty on them. They work great and are easy to install but be prepared to buy a new one every year, at least. I have now learned my lesson and bought a little more expensive one and it comes with a warranty.
Motorola SURFboard SB5101 Cable Modem is not recommended by somstottle