Carlton G. Amdahl has been a member of our board of directors since March 2009. Mr. Amdahl has been an employee at DCM, a venture capital firm, since August 2001, and a general partner since January 2007. Mr. Amdahl has twenty-five years of experience as a senior executive in the information technology industry. During this period, he was a founder of three publicly traded companies. Mr. Amdahl is a Stanford Sloan Fellow and holds a B.S. degree in Electrical Engineering and Computer Science from the University of California, Berkeley and an M.S. in Management from Stanford University.

J. Thomas Bentley has been a member of our board of directors since April 2008 and has served as the chairman of the audit committee since May 2008. Mr. Bentley has served on the board of directors of Nanometrics Incorporated, a provider of metrology and process equipment, since April 2004, and Rambus Inc., a chip interface technology company, since March 2005. Mr. Bentley was a Managing Director of Alliant Partners, a technology M&A advisory firm that he helped found in April 1990 and sold to Silicon Valley Bank in September 2001. Prior to founding Alliant, Mr. Bentley worked in leveraged buyouts with Berkeley International and Citicorp, and prior to that worked in economic development with the World Bank. Mr. Bentley holds a B.A. in Economics from Vanderbilt University and an M.S. in Management from the Massachusetts Institute of Technology.

Eric P. Buatois has been a member of our board of directors since March 2009. Since August 2001, Mr. Buatois has been a General Partner of Sofinnova Ventures, a venture capital firm, where he specializes in software and semiconductor investments in the wireless field. Prior to Sofinnova Ventures, Mr. Buatois held several positions in general management and executive operations at Hewlett-Packard, Ericsson and Texas Instruments. Mr. Buatois holds an M.S. in Computer Science and Communications Engineering from Ecole Nationale Superieure des Telecommunications in France.

Norman A. Fogelsong has been a member of our board of directors since September 2006 and has served as the chairman of the nominating and corporate governance committee since May 2009. Since March 1989, Mr. Fogelsong has been a General Partner of Institutional Venture Partners, a venture capital firm, where he currently specializes in investments in private later-stage companies and in select public market opportunities. Mr. Fogelsong holds a B.S. in Management Science & Engineering from Stanford University, an M.B.A. from the Harvard Business School and a J.D. from the Harvard Law School.

Ammar H. Hanafi has been a member of our board of directors since March 2009. Since February 2005, Mr. Hanafi has been a General Partner at Alloy Ventures, a venture capital firm, where he focuses on investments in communications and IT infrastructure, as well as Internet-enabled consumer and enterprise applications and services. Prior to Alloy, Mr. Hanafi served as Vice President of New Business Ventures at Cisco Systems, Inc., a networking and telecommunications company from October 2002 to February 2005, where he led new product efforts in the enterprise datacenter market and, from January 2000 to October 2002, served as Vice President of Corporate Business Development, where he was responsible for Cisco's acquisitions, acquisition integration, investment and joint venture activity on a global basis. Mr. Hanafi holds a B.S. in Applied and Engineering Physics from Cornell University and an M.B.A. from Stanford University.

Harold E. Hughes, Jr. has been a member of our board of directors since June 2004 and Chairman of our board of directors since December 2008. Mr. Hughes has served as a director of Rambus Inc., a chip interface company, since June 2003 and as its Chief Executive Officer and President since January 2005. Prior to joining Rambus, Mr. Hughes served as a United States Army Officer from December 1969 to April 1972 before starting his private sector career at Intel Corporation. Mr. Hughes held a variety of positions within Intel Corporation from June 1974 to August 1997, including Treasurer, Vice President of Intel Capital, Chief Financial Officer, and Vice President of Planning and Logistics. Following his tenure at Intel, Mr. Hughes was the Chairman and Chief Executive Officer of Pandesic, LLC. Mr. Hughes has served on the board of directors of Berkeley Technology Limited, a venture capital consulting company, since January 1987 and served on the board of directors of Xilinx, Inc., a supplier of programmable logic devices, from June 2003 until June 2006. Mr. Hughes holds a B.A. in Liberal Arts from the University of Wisconsin and an M.B.A. from the University of Michigan.

Andrew S. Lanza has been a member of our board of directors since December 2001. From February 2001 to August 2010, Mr. Lanza was a General Partner at Morgenthaler Ventures, a venture capital firm, investing in hardware companies and with a special emphasis on wireless and communications integration circuits. Prior to joining Morgenthaler, Mr. Lanza spent fifteen years in various senior operating positions in the optical telecommunications industry. Mr. Lanza was a founder of four component and system companies in that sector and is considered a pioneer of the fiber-to-the-home market having managed the program that delivered the world's first commercial PON system in 1992. Mr. Lanza holds a B.S. in Electrical Engineering and an M.S. in Mechanical Engineering from Stanford and an M.B.A. from the Harvard Business School.