The RequestedBatchSize parameter provides the control for the batch segmentation of the full set of output data generated by a coarse-grained operation such as getInventory or getActiveAlarms. The unit is any of the MTOSI objects. And, it defines the maximum number of MTOSI objects that can be included in all the batches of data sent as part of a multiple responses MEP.
However, they are cases where a batch may exceed the number of objects defined in the RequestedBatchSize parameter. This is true if the granularity of a response atomic data representation is greater than just one object. This is true for the getInventory response.