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Charles E. Levine has served as a member of our board of directors since June 2004. Mr. Levine retired in September 2002 from his position as President of Sprint PCS, a wireless communications company. From January 1997 to September 2002, Mr. Levine held various positions with Sprint PCS. From October 1994 to September 1996, he served as President of Octel Link, a voice mail equipment and services provider, and as a Senior Vice President of Octel Services, a provider of voice systems services. Mr. Levine also serves on the boards of directors of At Road, Inc., a wireless applications provider; Sierra Wireless Inc., a wireless solutions provider; Somera Communications, a provider of telecommunications infrastructure equipment and services; and Viisage Technology Inc., a biometrics and computer networks company. Mr. Levine holds a B.A. in Economics from Trinity College and an M.B.A. from the Kellogg School of Management at Northwestern University. | 