Edwards EST3 Life Safety Control Platform - FIREALARM EST3 is a modular control platform uniquely designed to meet the needs of applications ranging from standalone single panel fire alarm systems to multi-panel networks with unified fire alarm, security, and Mass Notification functions. Each function uses many of the same components, simplifying system layouts. Edwards - Engineering Systems Technology, Inc Edwards. EST3 is a robust modular control panel that unifies fire alarm, smoke control, security and mass notification systems. The EST3 fire alarm system is a leader in the field with the ability to have network panels with overall length in excess of 300,000 ft. Making the EST3 an ideal solution for any size facility.