CESRS is the network Cal OES uses for direction and control/mutual aid coordination. It connects Cal OES Regions, field staff, and many Operational Area Emergency Operations Centers (EOCs) via two-way radios. CESRS is also used in direct mode (CESRSD) as the "travel channel" for CAL FIRE strike teams travelling to and from mutual aid incidents.

CLERS is the law enforcement community’s mutual aid coordination radio network. It supports dispatcher-to-dispatcher communications at any level (City to Operational Area to Region to State) and is not intended to be used by field units.

The Cal OES Fire and Rescue Mutual Aid Coordination Network is known as "FIRE Net." It was formerly known as the Office of Emergency Services (OES) FIRE. FIRE Net is a dedicated radio network to support the Fire and Rescue Mutual Aid System. Cal OES FIRE Net supports the 65 Fire Operational Areas and the 6 Mutual Aid Regions as well as all Cal OES fire engines and support vehicles. For sustained operations authorization, permission must be obtained from the Fire and Rescue Duty Officer at the California State Warning Center (CSWC).

CALCORD is most often used as an air-to-ground frequency for medical helicopters.