MATSONIC MS9138E Series User Manual page 28

Mainboard User's Manual
SIR1: Serial infrared port
The mainboard supports a Serial Infrared (SIR1) data port. Infrared
ports allow the wireless exchange of information between your
computer and similarly equipped devices such as printers, laptops,
Personal Digital Assistants (PDAs), and other computers.
Pin Signal
1 NC
3 +5V
5 IRTX
24
Pin Signal
2 KEY
4 GND
6 IRRX