The defautl password was "password" on these devices, 3Com no longer sells them but their support site has the software and manuals free to download. Downlaod the Utility software and restore the facotry defaults and simply start over. Good Luck.
http://www.3com.com/products/en_US/detail.jsp?tab=support&sku=3CNJ220-BLK&pathtype=purchase
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