[HECnet] UPS driven OPC$CRASH?

[Brian Schenkenberger, VAXman-]

Steve Davidson <steve at davidson.net> writes:

>APC offered software to detect power failure using their UPSes for VMS but it
>was for the units that predate machines with USB support. Connection was via
>serial port.

I have a software product for APC UPSs that understands APC's so-called Smart
protocol.  It will work for any of the SmartUPS with a serial connector.  The
APC also had a mode where one of the serial signals would drop (essentially,
DTR) when the UPS went on battery.  Any UPS doing that signaling can easily
be used to shutdown a VMS system using a $QIO monitoring the associated port
on the system.  

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