Geosan Electronic Communication, established in 1988, developing its own research, production and distribution company at the time as a wild challenge on domestic jeonmuhan equipment and broadcasting equipment, now is the best evaluation and self-esteem as well as ongoing development of the system was 0.1988 years, starting minbanggong A / V MATRIX SWITCHER, RGB MATRIX SWITCHER, DIGITAL SWITCHER, integrated control systems, CCTV SYSTEM, subway video transmission systems, and other communication devices was developed