Description: The maximum capacity of the input sub-unit in input sub-unit capacity units (PrtCapacityUnitTC). There is no convention associated with the media itself so this value reflects claimed capacity. If this input sub-unit can reliably sense this value, the value is sensed by the printer and may not be changed 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. Additional information: This is specified assuming 20 pound paper for the paper trays. The tray 3 object does not exist when that option is NOT installed.