In the United States, the 911 system receives around 240 million calls per year. Now, that's a LOT of work volume. Not every call will be the same. Some calls are misdialed, some will be true emergencies, and some calls will be non-emergency calls from people who need guidance on who to turn to for their situation. The schedule and requirements of a 911 Dispatcher are not easy, so you must come prepared to speak to the interviewer about your ability to manage a significant volume of work for hours at a time.