Dell Latitude D510 - Manual (Page 78)

Serial Port allows you to map the serial port COM address or disable the serial port and its address, which frees computer resources for another device to
use.
Enabling the Infrared Sensor
1. Under Onboard Devices, select Fast IR.
2. Press <Enter> to select the Fast IR setting, and use the right-arrow or left-arrow keys to change the setting to a COM port.
3. Press <Enter> and then <Esc> to save the changes and exit the system setup program.
After you enable the infrared sensor, you can use it to establish a link to an infrared device. To set up and use an infrared device, see the infrared device
documentation and the
Windows Help and Support Center .
NOTE: The default setting is Off.