Hi Kenny,
Thank you for your question. However this community is for Cisco Small Business Products and the DPC3925 is not a Cisco Small Business Product.
Your product is an internet service provider (ISP) supported product. In other words you need to contact your ISP or technology reseller that you purchased this from to help you with your question.
However I did some research and found this area which may help you:
http://www.cisco.com/web/consumer/support/prod_modems.html#~homegateways
Regards,
Cindy Toy
Cisco Small Business Community Manager
for Cisco Small Business Products
www.cisco.com/go/smallbizsupport
twitter: CiscoSBsupport
Regards,
Cindy
If my response answered your question, please mark the response as answered. Thank you!