A ciscoEnvMonShutdownNotification is sent if the environmental
monitor detects a testpoint reaching a critical state
and is about to initiate a shutdown.  This notification 
contains no objects so that it may be encoded and sent in the
shortest amount of time possible.  Even so, management
applications should not rely on receiving such a notification
as it may not be sent before the shutdown completes.

A ciscoEnvMonVoltageNotification is sent if the voltage 
measured at a given testpoint is outside the normal range 
for the testpoint (i.e. is at the warning, critical, or
shutdown stage).  Since such a notification is usually 
generated before the shutdown state is reached, it can 
convey more data and has a better chance of being sent 
than does the ciscoEnvMonShutdownNotification.
This notification is deprecated in favour of
ciscoEnvMonVoltStatusChangeNotif.

A ciscoEnvMonTemperatureNotification is sent if the 
temperature measured at a given testpoint is outside 
the normal range for the testpoint (i.e. is at the warning, 
critical, or shutdown stage).  Since such a Notification 
is usually generated before the shutdown state is reached,
it can convey more data and has a better chance of being
sent than does the ciscoEnvMonShutdownNotification.
This notification is deprecated in favour of 
ciscoEnvMonTempStatusChangeNotif.

A ciscoEnvMonFanNotification is sent if any one of
the fans in the fan array (where extant) fails. 
Since such a notification is usually generated before 
the shutdown state is reached, it can convey more 
data and has a better chance of being sent
than does the ciscoEnvMonShutdownNotification.
This notification is deprecated in favour of
ciscoEnvMonFanStatusChangeNotif.

A ciscoEnvMonRedundantSupplyNotification is sent if
the redundant power supply (where extant) fails. 
Since such a notification is usually generated before 
the shutdown state is reached, it can convey more 
data and has a better chance of being sent
than does the ciscoEnvMonShutdownNotification.
This notification is deprecated in favour of 
ciscoEnvMonSuppStatusChangeNotif.

A ciscoEnvMonVoltStatusChangeNotif is sent if there is 
change in the state of a device being monitored
by ciscoEnvMonVoltageState.

A ciscoEnvMonTempStatusChangeNotif is sent if there 
is change in the state of a device being monitored
by ciscoEnvMonTemperatureState.

A ciscoEnvMonFanStatusChangeNotif is sent if there 
is change in the state of a device being monitored
by ciscoEnvMonFanState.

A ciscoEnvMonSupplyStatChangeNotif is sent if there 
is change in the state of a device being monitored
by ciscoEnvMonSupplyState.