The remaining capacity of the possible output sub-unit capacity in output sub-unit capacity units (PrtCapacityUnitTC)of this output sub-unit. If this output sub- unit can reliably sense this value, the value is sensed by the printer and may not be modified by management requests; otherwise, the value may be written (by a Remote Control Panel or a Management Application). The value (-1) means other and specifically indicates that the sub-unit places no restrictions on this parameter. The value (-2) means unknown. The value (-3) means that the printer knows that there remains capacity for at least one unit.