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Configuring the Interface Expander
continued
Behavior of
Confirmed mode
If power returns before any connected server has signaled
shutdown of the operating system, the Interface Expander
returns to On Line status.
If the Interface Expander detects a Low Battery condition in
the UPS before all connected servers have signaled shut-
down of the operating system, it notifies the servers that the
UPS battery is exhausted, shutting down the UPS after the
Low Battery Signal Time has elapsed.
If utility power returns after at least one server has con-
firmed shutdown of the operating system, but before all
servers have confirmed system shutdown, the Interface
Expander forces On Battery and Low Battery signals so that
the remaining servers shut down as well. The Interface
Expander sends the forced Low Battery signal for a period
of time equal to the Low Battery Signal Time and then shuts
down the
UPS
, which cycles power to restart the servers.
Confirmed
shutdown mode
and the
Advanced port
If you configure the Interface Expander in Confirmed shut-
down mode by setting DIP switches 1, 2, and 3 in the down
(0) position, you must set DIP switch #4 to determine the
behavior of the server or device connected to the Advanced
port.
When the Interface Expander is configured for Confirmed
mode, DIP switch #4 behaves as follows:
• With DIP switch #4 in the 0 (down) position, the
Advanced port operates normally, awaiting shutdown
confirmation in the Confirmed shutdown mode.
• With DIP switch #4 in the 1 (up) position, the Inter-
face Expander treats the Advanced port as always
confirmed. Use this setting when the Advanced port
will not be receiving a shutdown confirmation signal.
Note
:When the shutdown mode of the Interface Expander is
set to Until Low Battery or Timer, the position of DIP switch
#4 has no effect.
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