Suprisingly, the regular monitoring systems are pretty high tech, especially when you add the options like glass break sensors, motion sensors and infra-red heat detectors. The real problem is how to get the police there quickly when there is an intrusion. If you look up the figures, most alarm calls are false-- either people forgetting to turn it off whwn they enter or system errors. Because of that, police don't put as high a priority on the response as they should...