code: public void playAnnouncement(SipServletMessage message, String annoucementType) {
  		fireEvent(
  				(String) message.getSession().getAttribute("boothNumber"), 
  				null, 
  				"org.mobicents.slee.service.interopdemo." + annoucementType, 
  				message.getSession().getAttribute("callManagerRef"));
  	}
docs: /*
  (non-Javadoc)
  @see org.jboss.mobicents.seam.CallManager#playAnnouncement(javax.servlet.sip.SipServletMessage, java.lang.String)