Our story started in 1982 with the invention of the worlds first video multiplexer. In just under 25 years, weve become one of the markets leading innovators and manufacturers of CCTV security products - with a trul......Our story started in 1982 with the invention of the worlds first video multiplexer. In just under 25 years, weve become one of the markets leading innovators and manufacturers of CCTV security products - with a truly world-wide reputation. Here we present the full picture including the awards weve won, press releases and (if youre interested) career opportunities at DM.