On Sun, 2004-08-22 at 08:13, Jopoy C. Solano wrote:
> I'm not sure, but try experimenting on a rollover cable ... like the ones
> you use on console serial access. If you can't find one, just get an
> ordinary serial cable with a db9 female connector, like the ones you use
> for modems. You may need to change one end if you need both female
> connectors.

As far as I know, straight serial cables won't work (having tried one
and changing the gender of one of the plugs).  Electricity flows
differently with UPS.

>  Anyway, after connecting the serial port, try evaluating what bits it
> produces, then try to establish the pattern by checking out the values
> when the ups is plugged, unplugged (periods of time from full to near
> drain).

In theory, a dumb UPS serial cable would detect when the UPS switches
from AC to DC when a power failure happens. A "smart" UPS would be able
to detect more information.

I'm not really that conversant in electrical engineering (how I do wish
I took that :D) so any suggestions on how to go about with this?

-- 

Paolo Alexis Falcone
[EMAIL PROTECTED]

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