Call weighting. Dispatchers can tip you off to potentially violent calls.
Nordberg
M
M
D004631:Emergency Medical Service Communication Systems / Q000458:organization & administration*; D004634:Emergency Medical Technicians; D006801:Humans; D007400:Interprofessional Relations; D016272:Occupational Health; D013315:Stress, Psychological / Q000517:prevention & control; D014481:United States; D014754:Violence