The current capacity of the input sub-unit in input sub-unit capacity units (PrtCapacityUnitTC). 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 Contol 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 at least one unit remains. Additional information: For trays 1, CLJ8500 can only detect empty/not empty trays. It returns -3 for not empty and 0 for empty. For trays 2 and 3, CLJ8500 can detect approximately the amount of media. The value returned is based on the amount detected as follows: 0 - empty 1 - 1-110 sheets 50 - 50-260 sheets 200 - 200-490 sheets 430 - 430 sheets or more For tray 4, CLJ8500 can detect approximately the amount of media. The value returned is based on the amount detected as follows: 0 - empty 1 - 1 sheet to 25% of capacity 500 - 26% to 50% of capacity 1000 - 51% to 75% of capacity 1500 - 76% to 100% of capacity If the tray drawer is open, a value of -2 (unknown) will be returned.