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I have had a request to prepare a TG watchdog for installation inside a PC. To do this I am using the router to supply it power (as normal) and I have prepared a ribbon cable to go straight into the mainboards COM IDC header - rather than piggybacking ouside to a D9 socket and back in.
I also had the idea to use the TG watchdog as a means of powering down the box it lives in. Because it is powered externally to the server it lives it, it could reset or power down the system. I have some stuff I bought from mouser - 2 way inline SIL sockets and plugs. I'll have to post photos and part numbers. You could make a wedge cable to short the power or reset pins on the mainboard while leaving the button function intact.