}
this.sipFactory = SipFactory.getInstance();
this.sipFactory.setPathName("gov.nist");
this.sipStack = this.sipFactory.createSipStack(defaultProperties);
this.sipStack.start();
ListeningPoint lp = this.sipStack.createListeningPoint(host, CLIENT_PORT, testProtocol);
this.provider = this.sipStack.createSipProvider(lp);
headerFactory = this.sipFactory.createHeaderFactory();
messageFactory = this.sipFactory.createMessageFactory();
addressFactory = this.sipFactory.createAddressFactory();
this.provider.addSipListener(this);