I attempted to replace my rented cable modem with thisproduct. I spent one hour on the phone with a Comcast technician, but was unable to get a connection. I thenspent an additional hour on the phone with a Linksystechnician, but still counldn't make it work. She suggestedthat I return it, which I did. Linksys service is fine, butthis product appears to have been defective.