Fujitsu Remote Control User Manual page 6

Connecting optical remote control IR receiver
Connect the USB connector on the end of the remote control to one
of the USB ports on your computer that are labeled "IR Remote"
(Figure 6). Note that the location of the USB port on your system
may not be the same as that shown in the figure. Refer to the system
user's guide for the location of the USB ports.
Figure 6. Connecting the optical remote control receiver
6
The USB ports that can be used to connect the
optical remote control IR receiver cable are
labeled "IR Remote". Use only the labeled
ports to ensure optimal performance of the
remote control.