DFI KS211 User Manual page 19

Line-out
The line-out jack is used to connect a headphone or external speakers.
Chapter 3 Ports and Connectors
Chapter 3
Line-out
19
COM (Serial) Port
The pin function of COM port will vary according to JP7/SW4's settings. Refer to "COM RS232/
RS422/RS485 Select" in this chapter for more information.
The serial COM port is an asynchronous communication port with 16C550A-compatible UARTs
that can be used with modems, serial printers, remote display terminals, and other serial
devices.
COM:
RS232/422/485
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