this.eventScanner = new EventScanner(this);
	protected SipStackImpl() {		super();		NistSipMessageFactoryImpl msgFactory =			new NistSipMessageFactoryImpl(this);		super.setMessageFactory(msgFactory);		this.listeningPoints = new Hashtable();		this.sipProviders = new LinkedList();		this.eventScanner = new EventScanner(this);	}