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Advanced Operation and Settings
To use the Configuration Utility to view and change the US221A /
US421
A’s settings, click on the icon in your system tray and
select Settings. The following dialog box appears:
Auto Switch and Release
Enable these buttons to activate the US221A / US421A’s Auto
Switch function for a printer or other devices.
When Auto Switch and Release is enabled, commands sent to
the USB peripheral device are stored to be processed on a first-
come, first-served basis. Control of the US221
A / US421A and the
USB peripheral device is locked on the computer currently
performing the action and then automatically released after the
action is completed.