public void start(){
  managedPairs.add(createPort());
  fixNames();
  inPorts.addObserver(observer,false);
  outPorts.addObserver(observer,false);
}

public void start ( ) { managedPairs . add ( createPort ( ) ) ; fixNames ( ) ; inPorts . addObserver ( observer , false ) ; outPorts . addObserver ( observer , false ) ; }
creates an initial port and starts to listen .
