Sun Java System Instant Messaging (Instant Messaging) enables end users to participate in instant messaging and chat sessions, to send alert messages to each other, and to share group news instantly. Instant Messaging is suitable for both intranets and the Internet, and supports interaction with other instant messaging providers.
The Java ES installer provides Instant Messaging as a single installable component. The following Instant Messaging subcomponents can be installed separately:
Instant Messaging Server Core. Includes server and multiplexor software.
Instant Messaging Resources.
Access Manager Instant Messaging Service.