code: private void send(final Destination d, final Priority p, final byte[] apdu, final int response)
  		throws KNXTimeoutException, KNXDisconnectException, KNXLinkClosedException
  	{
  		svcResponse = response;
  		if (d.isConnectionOriented()) {
  			tl.connect(d);
  			tl.sendData(d, p, apdu);
  		}
  		else
  			tl.sendData(d.getAddress(), p, apdu);
  	}
docs: helper which sets the expected svc response, and sends in CO or CL mode