Description: The type of technology (discriminated primarily according to feeder mechanism type) employed by the input sub-unit. Note, the Optional Input Class provides for a descriptor field to further qualify the other choice. Refer to Printer Management Standards web page, http://www.pwg.org, for more details in the original format of the Standard Printer MIB. Additional information: Tray 1 is the multi-purpose tray and is always present. Tray 1 can operate in manual feed mode and supports both sheets and envelopes. its type is ePsheetFeedAutoNonRemovableTray. Color LaserJet8550 base model does not support tray 2. Trays 2 (8550 N and up) and 3 are the drawers and, although they are usually not removed from the printer, the printer cannot distinguish the open and removed conditions. Therefore, when they are open, they are considered to be removed and, for this object, they are considered to be of type ePsheetFeedAutoRemovableTray. Tray 4 is the high capacity input device. .