Sony PCG-838 - Manual (Page 46)

VAIO Notebook Computer User Guide 36
Using Infrared Communication Devices
Your computer includes an infrared port, located on the back panel. You
can use this port to communicate with other infrared-equipped devices
with compatible protocols, such as a digital still camera or other
computers.
To use infrared communication with a digital still camera
Align the infrared ports on the computer and the digital camera so that
they are in a direct line.
To use infrared communication with another computer
Align the infrared ports on the two computers so that they are in a direct
line.
Infrared port