The Sametime widget in IBM Mashup Center
works differently than other Sametime clients. It is physically hosted
on the IBM Mashup Center Server (or the Lotus Mashup portion of the IBM
Mashup Center Server should your configuration include the splitting of
installed components). As a result the true point of communication between
your organization's Sametime environment and the Sametime widget is the
Mashup server itself.
Think of the Mashup server having to
act both as a client AND as another Sametime server to provide for communication.
As a result TCP ports 1516 and 1533 must be open between the IBM
Mashup Center Server and a single server (or servers) in your organizations
IBM Lotus Sametime environment.
At present SSO (Single-Sign-On) is not
supported by the Sametime widget.