Mayo Clinic Ambulance Service Emergency Communications provides 24-hour dispatching for Basic Life Support, Advanced Life Support and Critical Care transportation. The center handles about 400 service calls a day. They work primarily with medical professionals, emergency first responders, fire departments, law enforcement and others who arrange patient transports. The Emergency Medial Dispatchers facilitate transports by air or ground ambulance. In many communities served, Emergency Communications deploys the medical response for 911 calls and provides instructions to the caller on what to do until the ambulance arrives.