If the value of the unitsCounted attribute in moduleData component
is segments, this attribute counts the total number of segments in
frames received from the interface since the start of the interval
period. If the value of the unitsCounted attribute in moduleData
component is frames, this attribute counts the total number of
frames received from the interface since the start of the interval
period. The start of the interval period is captured in the startTime
attribute. The count is reset to zero when an accounting record is
generated