VoIP Cookbook: Configure Linksys SPA3000
From OnnoCenterWiki

SPA3000 logical configuration is not much different from other VoIP equipment. In general, we need to configure: IP address, Netmask, Gateway, DNS, the telephone number, password and SIP server. The initial appearance of SPA3000 is somewhat similar to that of other Linksys products. So this is a plus for those who are already familiar with Linksys product.