Ubbe
Member
Maybe an alarm systems can be built that way. One alarm point are connected to one radio and it transmits "keep alive" to a TG that someone listens to. If no transmissions are received a malfunction alarm goes off for that RID. If the alarm point triggers it sends something else, maybe a text message or a status code.
But then why does it cycle the "keep alive" transmissions between the different transmitters and it is only one transmitter keying at a certain time? Is it someone moving, maybe a border patrol, that triggers each alarm point as they drive by them when they patrol the border?
/Ubbe
But then why does it cycle the "keep alive" transmissions between the different transmitters and it is only one transmitter keying at a certain time? Is it someone moving, maybe a border patrol, that triggers each alarm point as they drive by them when they patrol the border?
/Ubbe
