Cheap or free auto-shutdown setup (was: Reliability Sys V file sys)

[andrew.d.hay]

In article <1030 at bilver.UUCP>, bill at bilver.UUCP (Bill Vermillion) writes:
[]
> Why couldn't you just use a cheap relay connected to the mains power
> source.  Then connect pins 2 & 3 of the rs232 to a pair of contacts that
> are closed when power is on.  Then just send something out and see if it
> echos.  If it doens't come back to you, the power is off!
> 
> Or am I really overlooking something here?:

that's what we do here -- in fact, our upses have such relay contacts
built in...

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