SIM CARD: Requires a devoted data sim for that SMS messages,place it within the rear slot of the primary alarm box.can increase 6 groups preset alarm cell phone number and 3 teams sms telephone number The distinction between an FACP and annunciator panel is usually that FACP is the principle https://www.firesense.co.uk/type/conventional-fire-system/conventional-fire-alarm-control-panels/