In the VHF spectrum, the H.E.A.R. Frequencies, 155.340 MHz is used for Medical Control. A Statewide Medical Coordination channel will enable ALS, BLS and emergency medical facility personnel to talk when a vehicle is out of its primary area or unable to contact the facility through the Medical Control channel of their area. SMC channel 1 may be used during critical situations where the use of the Medical Control channel would be impractical. Use of the SMC must be limited. It will be used during disaster situations for statewide emergency medical coordination .
Many agencies use various frequencies for the mutual aid.
These frequencies will be included in the state EMS Resource Directory . EMS communications systems must provide this capability. Telephone communications during normal operations are excellent means. However, during disasters telephone services, particularly cellular telephone, will be greatly reduced or nonexistent. Radio communications may be more survivable during disasters.