Description: The current level if this supply is a container; the remaining space if this supply is a receptacle. If this supply container/receptacle can reliably sense this value, the value is reported by the printer and is read-only; 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. A value of (-3) means that the printer knows that there is some supply/remaining space, respectively. Refer to Internet Draft Printer MIB, expiring Sept. 1997 for more details. Additional information: The fourpak products cannot sense toner level. The fourpak products always return -2 (Unknown).