public HashMap beep() throws Exception
    {
        ArrayList<Integer> answer = this.device.send(0x13, 1, new char[]{});
        if (answer.size() == 0 || answer == null)
            throw new Exception("Пустой ответ");

        HashMap<String, Integer> result = new HashMap<String, Integer>();
        result.put("result", answer.get(0));

        if (answer.get(0) == Status.OK)
        {
            result.put("error_code", answer.get(4));
            result.put("operator", answer.get(5));
        }

        return result;
    }