DESC: Linksys One is a complete, affordable, easy-to-install communications solution for growing businesses, delivering telephones, data networking, applications, and the Internet through one high-speed connection from a single provider. Business class communications services are delivered by a Linksys One Services Router, which requires only one internet connection for all services - including low-cost phone service. A Linksys One Services Router is the core for your network and must be present in all Linksys One solutions. The PHM1200 is the premier wired IP telephone of the Linksys One solution.