Description: The value of prtOutputIndex corresponding to the default output sub-unit; that is, this object selects the default output destination. This value shall be -1 if there is no default output subunit specified for the printer as a whole. In this case, the actual default output subunit may be specified by means outside the scope of this MIB, such as by each interpreter in a printer with multiple interpreters. Additional information: LaserJet 4100mfp has two output bins in the base product: a face-up bin on the back of the engine and a face-down bin on the top of the engine. These bins are not firmware-selectable; instead, paper is diverted to the face-down bin only if the face-up bin is physically closed. Therefore, these bins are considered together as the 'standard' bin. However, if an HCO is attached to the engine, users will be able to select between an HCO bin and the 'standard' bin, which may be either the face-up or face-down bin, depending upon whether the face-up bin is open. With external output bins attached, the value of this object will be settable from the control panel and by the PJL OUTBIN variable.