9-1-1 Communications Definitions

PSAP - Public Safety Answering Point
Public Safety Answering Point (PSAP) is a call center responsible for answering calls to an emergency telephone number for police, firefighting, and ambulance services.

CAD - Computer Aided Dispatch

OSSI CAD system is used to enter and track all calls for service. The system provides dispatchers with apparatus recommendations for responses, GIS mapping, automatic vehicle locator (AVL) information, and links to mobile data terminals (MDT) in the field.  It is the primary repository for incident related information.