Xref: utzoo comp.unix.questions:25894 comp.unix.sysv386:866
Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!att!cbnews!mvadh
From: mvadh@cbnews.att.com (andrew.d.hay)
Newsgroups: comp.unix.questions,comp.unix.sysv386
Subject: Re: Cheap or free auto-shutdown setup (was: Reliability Sys V file sys)
Message-ID: <1990Oct1.121614.13776@cbnews.att.com>
Date: 1 Oct 90 12:16:14 GMT
References: <1990Sep29.220137.6550@intek01.uucp-> <1030@bilver.UUCP>
Followup-To: comp.unix.questions
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 17

In article <1030@bilver.UUCP>, bill@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@att.com		+------------------------------------------------------+