Samsung 320MX-3 LH32HBPLBCEN ユーザーズマニュアル

Connecting to MDC

Using MDC via RS-232C (serial data communications standards)

An RS-232C serial cable must be connected to the serial ports on the PC and monitor.

What is MDC?

Multiple display control "MDC" is an application that allows you to easily control multiple display devices 

simultaneously using a PC.