this.sipStack = sipFactory.createSipStack(properties);
this.listeningPoint = sipStack.createListeningPoint("127.0.0.1",
port, transport);
sipProvider = sipStack.createSipProvider(listeningPoint);
this.addressFactory = sipFactory.createAddressFactory();
this.headerFactory = sipFactory.createHeaderFactory();
// Create the request.
this.messageFactory = sipFactory.createMessageFactory();
sipProvider.addSipListener(this);
timer.schedule(new TimerTask() {