Cetis, Inc., formed through the 2006 merger of Scitec and TeleMatrix, and the 2009 acquisition of Teledex assets, designs and manufactures a broad range of analog and VoIP hotel phones. In 1982 we introduced the ?rst Teledex brand hotel phones with programmable guest service keys and a customizable faceplate area. Four years later, in 1990, we introduced Diamond Series hotel phones, which continue to be recognized as the most popular hotel phones in the world. Since 1982, hundreds of Cetis channel partners have installed more than 30 million Cetis hotel phones at 100,000 locations globally. Click on the Founder button below to learn more about Cetis founder Dr. Bing N. Sun.