Communications Suite products depend on other Sun Java System component products that provide infrastructure services. These component products include Sun Java System Directory Server and, optionally, Sun Java System Access Manager. Additionally, Communications Suite products depend on a web container to serve HTML content and provide HTML connections. You can use Sun Java System Web Server (formerly Sun ONE Web Server) or Sun Java Application Server to fulfill this need.
Communications Suite products also depend on the existence of DNS. You need to have a functioning DNS server before you can install the Communications Suite products.
See Chapter 3, Understanding Product Requirements and Considerations for more information on product dependencies.