HP UPD - System Administrator's Guide HP UPD 5.6.5

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Administrator Preferences Not Applied
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Last Configured xx/yy/zzzz
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Default Configuration
b. Enabled (Auto Configuration Takes Priority)
c. Enabled (Driver Pre-Configuration Takes Priority)
1. Is the current Processing order for DMC /PRINTER AUTOMATIC CONFIGURATION
2. Is the default for PRINTER AUTOMATIC CONFIGURATION.
Communication protocols
Bidirectional communication between the HP UPD driver and the target device occurs directly (USB or parallel
connection) or over the network:
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SNMP over the network—UDP ports 161 (snmp sets/gets).
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HTTP over the network (Job Capabilities Ticket)—a compressed file that can be sent to the UPD over
http that defines specifications for the target device. JCT implementation in UPD v5 only includes paper
sizes, paper type and HP Easy Color. Devices supporting JCT will also communicate SNMP information
during bidirectional communication, therefore JCT supported devices might display more capabilities
compared to non JCT supported devices.
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PML over DOT4—DOT4 is based on the IEEE 1284.4 protocol. For direct connect, DOT4 over USB or
DOT4 over LPT is used for most devices. Many composite devices do not support DOT4 and might
support an alternate directional mechanism.
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Low end device model (LEDM) over Composite USB—Beginning with UPD v4.7 the UPD can query low
end laser models direct to get device configuration, status and alerts over composite USB. If the low end
device is also networked, UPD printer automatic configuration will use the network.
Printer Automatic Configuration services
HP UPD installs two services that enable Printer Automatic Configuration to function. In combination these
services allow the HP UPD to retrieve device configuration after installation, using UPDATE NOW, or via
command line using RUNDLL32.
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Net Driver HPZ12—Provides channelized data transfers over the network for scan and fax
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Pml Driver HPZ12—For USB connected devices that support PML or for network SNMP, provides the
ability to determine what features a device has using printer automatic configuration and device status.
Steps to Disable
By default two UPD installed services are set to load Automatic. If the UPD is pre-configured prior to
installation to disable Printer Automatic Configuration using the Driver Configuration Utility or HP Driver
Deployment Utility, and the system installing UPD does not already have the UPD or other HP driver utilizing
bidirectional communications, the UPD services will not be registered to the system.
If the “PML Driver HPZ12” is stopped and set to Manual the service will restart when UPD Update Process is
launched; if set to Disable when the UPD Update Process is launched an error might be generated.
76 Chapter 7 Use the HP UPD ENWW