boolean autoDialog, boolean isBackToBackUserAgent, boolean isReentrant) {
this.autoDialog = autoDialog;
this.transport = transport;
SipFactory sipFactory = SipFactory.getInstance();
sipFactory.resetFactory();
sipFactory.setPathName(pathname);
Properties properties = new Properties();
properties.setProperty("javax.sip.STACK_NAME", stackname);
// The following properties are specific to nist-sip