This table contains the attributes which define the
bandwidth utilization thresholds for the upstream and
downstream interfaces and when the load on these interfaces
exceeds the upper threshold, the monitoring of the
associated modems service flows starts, and it stops when
the interface utilization drops below the lower threshold.
For the monitoring to start, there should be appropriate
enforce-rules defined. In case no thresholds are defined,
by default the monitoring of modems would take place if
the appropriate enforce-rules are present.