Centillium Communications, Inc. engages in the design, development, and supply of system-on-a-chip (SoC) solutions for broadband access infrastructure and various applications enabling broadband services. The company's SoC products incorporate digital and mixed-signal semiconductors, and related software for use in the voice over Internet protocol (VoIP) and fiber-to-the-premises (FTTP) markets. Its VoIP products comprise Entropia III, a VoIP system-on-chip processor that process voice channels for voice and media gateways, wireless infrastructure gateways, class 4 and 5 switch replacements, digital loop carriers, voice-enabled IP routers, and IP private branch exchange systems; and Entropia II LP that processes voice channels per chip, which is used in central office and enterprise voice equipment that require mid-level channel densities and central office equipment that process both DSL and VoIP signals. Its FTTP technologies offer network access for both residential and business end users; and physical layer solution that comprise the Apollo chipset, which supports multiple applications from a single footprint. The company serves systems vendors and original equipment manufacturers, who sell DSL and optical network equipment, as well as VoIP equipment and consumer telephony applications in Japan, Italy, the United States, rest of Asia-Pacific, and rest of Europe. It markets and sells products through its direct sales force, independent sales representatives, and an independent distributor in Europe and Russia. The company was founded in 1997 and is headquartered in Fremont, California. As of October 24, 2008, Centillium Communications, Inc. operates as a subsidiary of TranSwitch Corp.