I have Comcast business class and for the most part I don't have any issues with it. However, 5 or 6 times a year it goes down due to an outage in the area. Obviously this puts me out of business for the day. I'm tempted to get a backup ISP like ATT or a inexpensive dsl connection. Is there a cost effective way to use Comcast as my primary, but have a router or something automatically flip to the back up when the primary goes down? Thanks for any help.