Palm Tungsten T3 Handbook page 293

Your computer must have an installed infrared driver.
If you have an external infrared device attached to your computer, a driver is
probably included with the device. Consult the documentation included with
the device for information on installing the required driver.
Check your computer's documentation to learn whether the computer supports
infrared communication.
To configure HotSync Manager for infrared communication on a Windows computer:
Click the HotSync Manager icon
that Infrared is selected.
– If you have an Infrared option on the HotSync Manager menu, and that
option is selected, skip to
– If you do not have an Infrared option on the HotSync Manager menu,
complete the following steps:
Make sure that Local Serial is selected on the menu.
a.
From the HotSync Manager menu, select Setup.
b.
Click the Local tab.
c.
In the Serial Port drop-down box, select the simulated port that your
d.
computer uses for infrared communication.
See the documentation for your operating system for instructions on
finding the simulated port. This information is usually located in the
Control Panel.
Click OK.
e.
If your cradle/cable is connected to a USB port, you can continue using the
NOTE
cradle/cable while HotSync Manager is configured for infrared communication. If
your cradle/cable is connected to a serial port, you cannot use your HotSync
cradle/cable again until you reconfigure the HotSync Manager to communicate with
the port defined for cradle/cable synchronization.
Conducting IR HotSync operations
in the Windows system tray, and make sure
"Performing an IR HotSync operation."
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