The AMPDS categorises all calls to the ambulance service using it as either 'A' category (immediately life-threatening), 'B' Category (immediately health threatening) or 'C' category (non-emergency call that still requires a response).
AMPDS将对救护车服务的所有呼叫分类为“A”类（即将危及生命），“B”类（紧迫健康威胁）或“C”类（非紧急呼叫，但仍需响应）。