FAQ's, Firmware, Warranty Information and more found at link below.
http://us.dlink.com/products/?pid=DGL-4100&tab=3 (http://us.dlink.com/products/?pid=DGL-4100&tab=3)
(Note: If you've never been to the United States support site before, you'll be prompted to select the country, then this link will take you directly to the product page.)