The operator initially has to confirm that s/he heard the address correctly to make sure help is sent to the correct location. A callback number needs to be obtained in case the call is disconnected prior to obtaining necessary information. After initial information is obtained, the 9-1-1 operator then asks a variety of questions based on the type of call. The main reason for this is so that s/he is able to gather as much information as possible to send the correct type of help (EMS, police, fire, etc.) and the correct level of help (medic, medic/engine, medic/engine/law enforcement). These questions are also asked to ensure that responding units have all of the available/necessary information to respond to the call with the proper resources and to make sure parties involved and first responders are kept safe by knowing the specifics of the situation they are entering into (site dangers, active violence, etc.).