code: public void quit()
  	{
  		if (pc != null) {
  			final KNXNetworkLink lnk = pc.detach();
  			if (lnk != null)
  				lnk.close();
  			Runtime.getRuntime().removeShutdownHook(sh);
  		}
  	}
docs: Quits process communication.
  <p>
  Detaches the network link from the process communicator and closes the link.