A maintenance policy with 1st Call covers you for the main central control unit and all the components within, plus all your main system specific handsets.  We carry a large stock of system components in our own warehouse and our engineers always carry a variety of common components in order to resolve the problem on the first visit, no waiting for parts to be ordered. Our maintenance is 24 hours / 7 days a week and all of our maintenance customers are given a dedicated out of hours number to access our on call engineer in times of emergency.