Repeat methods two to 4 for your entire outdated BRK alarms. We suggest replacing all alarms from the method collectively to maintain the best possible program Procedure; failing to do so may compromise interlink general performance. Depending on your situations, we can easily expedite this processing time For extra costs, https://www.firesense.co.uk/type/addressable-fire-system/addressable-fire-alarm-control-panels/