User's Manual

with other items such as the MAC address and IP address. Some functionality, such as Reports, is
blocked in HP Web Jetadmin if the serial number cannot be obtained. Therefore, HP Web Jetadmin
makes a strong effort to obtain the serial number from third-party devices. The most typical and widely
supported object to extract for obtaining the serial number is prtGeneralSerialNumber.
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Status: Device status, which indicates the current state of the printer (for example, online or paper
jam), is displayed based on responses to standard objects such as hrPrinterDetectedErrorState.
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System Contact: The system contact is displayed from the response to sysContact.
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Storage: The presence of storage media such as a hard disk, flash disk, RAM disk, and installed RAM can
be detected using hrDiskStorage objects. Additional storage information is provided on the Storage tab
for certified devices.
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Remaining Input Tray Levels: The approximate amount of paper remaining in a particular tray can be
displayed by calculating a percentage based on responses to the Standard MIB objects
prtInputCurrentLevel and prtInputMaxCapacity.
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Remaining Toner Levels: The approximate amount of toner or ink remaining in the cartridge cavity is
determined by calculating a percentage based on prtMarkerSuppliesLevel and
prtMarkerSuppliesMaxCapacity.
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Reports: Basic support includes only the Device Inventory report. Advanced support may include
reports that make use of the various supported page count values, such as Accessories Inventory
(capabilities), Supply Utilization (marker supply information), Device Utilization (page counters), and
Hourly Peak Usage (hourly page counters).
Troubleshooting
Determining why a particular non-HP device supports the features that it does is usually a result of the
device's ability to answer the queries HP Web Jetadmin sends. Certified devices have known objects written in
their device plug-ins and those objects have already been tested, so issues rarely occur on those devices.
However, for qualified devices and those requiring basic support, HP Web Jetadmin is dependent on the
device to answer industry-standard queries. Some devices support more gauges than others. You cannot
always assume that all devices from a particular vendor support the same features. For example, one Xerox
model may support the control panel display, while another Xerox model does not. The following are
common explanations for why particular items may not appear for devices.
Issue Resolution
A gauge may be present for a consumable, but the gauge is
hashed out instead of containing a remaining percentage.
If a devices answers prtMarkerSuppliesDescription correctly, the
gauge is present because HP Web Jetadmin knows the
consumable exists. However, if the device cannot answer either
prtMarkerSuppliesMaxCapacity or prtMarkerSuppliesLevel
correctly, the percentage cannot be calculated and
HP Web Jetadmin displays hashes instead to indicate an unknown
level.
A paper tray gauge does not indicate a remaining percentage. While a device answers the prtInputType query to indicate a tray
is present, the device may respond to the prtInputMaxCapacity
and prtInputCurrentLevel queries with either valid values or an
indication that at least one sheet remains. If the device returns
valid values, a calculation is presented. If the device does not
provide valid values, HP Web Jetadmin displays either Empty or
Not Empty, depending on whether the device indicates at least
one sheet remains.
The control panel displays Not Supported or Unknown. Not Supported indicates the device did not respond to the
prtConsoleDisplayBufferText object. Unknown may indicate that
the devices recognizes the prtConsoleDisplayBufferText object,
but did respond with any text.
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