public void startConversation(String endpointName) {
logger.info("Joining " + endpointName + " with " + LOOP_ENDPOINT);
MsConnection connection = (MsConnection) sbbContext.getActivities()[0].getActivity();
MsSession session = connection.getSession();
MsLink link = session.createLink(MsLink.MODE_FULL_DUPLEX);
ActivityContextInterface linkActivity = null;
try {
linkActivity = mediaAcif.getActivityContextInterface(link);
} catch (UnrecognizedActivityException ex) {
}
linkActivity.attach(sbbContext.getSbbLocalObject());
link.join(endpointName, LOOP_ENDPOINT);
}