Connect 3660 - Router To Dsl Modem

Hi

I just went through something similar myself with a 2514 to more 2514's which was a total headache I can help you out with this issue, but can you tell me if you plan on routing that dsl connection to other routers or what? What do you plan to do? Sorry to be so nosey, but if you plan to route from the 3660 I think I can help you.