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Q. What is an STU “check in” message?

A. Each STU is pre-programmed to check in a specified number of times every day on a particular schedule. MGM file servers “look” for these “check in” messages from each STU to be sure each device is communicating and that all on board systems are functioning normally. The GPS location is also transmitted with this “check in” data package and the servers check this transmitted GPS location against the last five stored GPS locations previously sent by the STU to assure the storage facility has not been moved. If a check in signal is not received at its scheduled time, the system status will escalate from a “normal status” to an “alert status”. If the next check in signal is received on schedule and all on board systems are functioning normally, the system will revert back to “normal status”. However, if the next consecutive check in message is not received (and/or an on board system is not functioning normally) then the system will escalate further from an “alert status” to an “alarm status”