Properties properties = configuration.createInitialProperties();
setSipStack(configuration.getSipFactory().createSipStack(properties));
configuration.parseURI();
if (sipPublishListener == null) {
sipPublishListener = new SipPublishListener(this);
}
configuration.setListeningPoint(
sipStack.createListeningPoint(configuration.getFromHost(), Integer.valueOf(configuration.getFromPort()).intValue(), configuration.getTransport()));