Repeat actions 2 to 4 for all of your old BRK alarms. We recommend replacing all alarms in the system with each other to maintain the best possible procedure Procedure; failing to take action may possibly compromise interlink functionality. Depending on your situations, we will expedite this processing time For https://www.firesense.co.uk/type/addressable-fire-system/addressable-fire-alarm-control-panels/