The call taker is the first line of communication between the patient and EMT's. Each call taker will fill a number of critical functions. The first of these is the identification of basic call information, including the location and telephone number of the caller, the location of the patient, the general nature of the problem, and any special circumstances. The next area of responsibility involves providing expert systematized caller interrogation, using the script provided by the Emergency Medical Dispatch system, in order to determine the likely severity of the patient's illness or injury, so that the most appropriate type of response resource may be expedited. All calls are prioritized by medical symptom and condition acuity.