The Hospital Emergency Alerting Radio (HEAR)is a VHS system that allows direct radio communication between ambulance and hospital and was primarily used several decades ago before the UHF CMED communication system was established. CMED uses the HEAR for communications with other CMEDs and does not monitor it for ambulance traffic or provide entry notification facilitation (i.e. , a "patch")to the hospitals via HEAR.
HEAR radio use for ambulance to hospital communications does not allow for recorded radio traffic or for the coordination of the flow of traffic to the hospital in cases of Mass Casualty Incidents.
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