This object specifies the falling threshold for the in-use
gauge corresponding to this range of IP addresses, which must
have a value less than or equal to the corresponding instance of
ciapRangeThresholdRising.
If this value is '0' and the corresponding instance of
ciapRangeThresholdRising is '0', then the IP address pool
manager does not monitor this range of IP addresses for
threshold crossing events.
The value of ciapGlobalThresholdFalling.0 specifies the default
value for newly created instances of this object.
For more detail, see the description of IP address pool
threshold monitoring provided by the descriptive text associated
with the MODULE-IDENTITY statement.