Some accessories that are automatically discovered and configured include the duplexing unit, optional
paper trays, printer hard disk, and dual inline memory modules (DIMMs).
Driver autoconfiguration
Automatic discovery and driver configuration through bidirectional communication occurs in the
following circumstances:
●
When a print driver is installed by using the installer
●
When using the Update Now feature for a driver that is already installed
However, as shown in the following table, driver autoconfiguration and Update Now are not available
in Windows® XP, Windows® Server 2003, Windows® Server 2008 and 2008 R2, Windows Vista®,
or Windows® 7 operating systems over a direct connection when the product is installed by using the
Add Printer Wizard.
Table 2-3 Automatic discovery and driver configuration through bidirectional communication
1
Connection type Add Printer Wizard install Common installer
Network Yes Yes
Direct connection No Yes
1
The table applies to Windows® XP, Windows® Server 2003, Windows Server® 2008 and 2008 R2, Windows Vista®, and
Windows® 7.
Bidirectional communication
In environments that support bidirectional communication, the computer communicates with the product
during installation, determines the physical configuration, and then configures the driver accordingly.
Bidirectional communication is the capability of the product to respond to data inquiries from the
computer and report information back, such as what type of print paper is available or what
accessories are connected to the product. Bidirectional communication depends on the network
operating system and on the type of connection that exists between the computer and the product. If the
connection does not have this capability (that is, if it has no bidirectional mode), it can only accept
commands from the host and cannot report information back to the host computer.
Update Now
If you have modified the configuration of the product since installation, the driver can be automatically
updated with the new configuration in environments that support bidirectional communication. Use the
Update Now feature to automatically reflect the new configuration in the driver.
For example, if the product is installed and an optional paper-handling accessory is added later, use
the Update Now feature to query the product and update the settings to match the new product
configuration.
The feature automatically updates the registry and changes the configuration information that appears
on the Device Settings tab.
56 Chapter 2 Windows® software description and installation ENWW
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