I work for a large university supporting plant researchers and they have a series of control systems in their greenhouses which send alarms when temperature readings (among other things) are out of range and notify an on-call staff member. The greenhouse director is leery of potential alarms coinciding with a network outage (not common but a few have happened in recent enough memory that everyone is still jumpy) where no one from her team would be notified causing possible loss of plant matter (in the event that temperatures were far enough outside the range that the plants would freeze). Some of this plant material cannot be replaced if lost, and losses could be in the scope of several million dollars.
I'm wondering if anyone is familiar with a product that would allow us to easily monitor this. I'm thinking something like a sensaphone which would connect to a switch on that network and call out over a cell network should the link go down for more than a given time period.
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