P25 is an international standard for digital two-way wireless communications.
The standard, which is also used by the New Zealand police, allows for improved communications within and between agencies - especially emergency services.
Tait said the radios included greater water protection and the ability to filter out background noise from helicopters, trucks, sirens, hoses and machinery.
The installation also paved the way for planned future enhancements of CFA's communications such as GPS location and crystal-clear digital audio.
The system also allowed CFA to communicate with other state emergency-response agencies as new digital networks became available.
Tait Communications, which is owned by a charitable trust, was founded by electronics pioneer the late Sir Angus Tait in 1969. It employs about 800 people globally.