private Broker() {
start_time = DateTime.Now;
_instance = this;
upgrade_settings();
Utils.PluginLog("", "");//clear file
headset_plugin_manager = new HeadsetPluginManager();
conference = Conference.instance;
NewEvent += Call.NewFSEvent;
NewEvent += Account.NewEvent;
NewEvent += conference.NewFSEvent;
Call.CallStateChanged += CallStateChangedHandler;
init_us();
loaded();
}