These sites house the 6 simulcast 800 MHz interoperable Countywide Coordinated Communications Systems, numerous VHF, UHF and 800 MHz mutual aid radio systems, the County's 900 MHz paging system, 50 high capacity digital microwave transmitter/receivers and several Alert & Warning radio systems utilized for public and crisis management notification during emergencies. Each of these systems directly support all Orange County public safety agencies including county law enforcement (Sheriff, Probation, District Attorney), all city police departments, the Orange County Fire Authority, all city fire departments, all paramedic and hospital communications, all city and county lifeguards, as well as all city and county public works and public utility departments.