They would never go the encryption route here as the two major hospitals receive patients via EMS from at least 8 counties spread across two states. All the EMS units run on 155.340 and call into the hospitals with patient data. The "local" ambulance system uses their own frequency to contact the hospitals here in Cape, but if they run out of county, they also use 155.340.
I could see it occuring in a major metropolitan area, but in the rural areas I doubt if you will ever see it due to the vast array of equipment that is used by the local EMS units - Motorola, Icom, Kenwood, Tait, Vertex-Standard, etc. Some of it would not be capable of operating in the encrypted mode. I know of one EMS unit in the area that has an 1980's vintage Regency rig as it's main radio!
Dennis
I could see it occuring in a major metropolitan area, but in the rural areas I doubt if you will ever see it due to the vast array of equipment that is used by the local EMS units - Motorola, Icom, Kenwood, Tait, Vertex-Standard, etc. Some of it would not be capable of operating in the encrypted mode. I know of one EMS unit in the area that has an 1980's vintage Regency rig as it's main radio!
Dennis