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

andrew.d.hay mvadh at cbnews.att.com
Mon Oct 1 22:16:14 AEST 1990


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...

-- 
Andrew Hay		+------------------------------------------------------+
Ragged Individualist	| 	You just have _N_O idea!  It's the difference    |
AT&T-BL Ward Hill MA	|	between _S_H_O_O_T_I_N_G a bullet and _T_H_R_O_W_I_N_G it!     |
a.d.hay at att.com		+------------------------------------------------------+



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