Mr. Richard T. Liebhaber

A business executive, he received a B.S. degree in Electrical Engineering from New York University in 1954. He retired as Executive Vice President and Chief Technology Officer of MCI Communications, Inc. (?MCI?) in 1995, where he architected, engineered and constructed MCI's network and managed the establishment of a number of joint ventures, including Concert, thejoint venture between MCI and BT Group plc. He also served as a Member of the Board of Directors of MCI Communications Corporation from July 1992 to May 1995. Prior to joining MCI in 1985, he was IBM's director of Business Policy and Development after serving in engineering, manufacturing, product test, service and marketing positions from 1954 to 1985. He is also a Director of Cogent Communications Group, Inc (and is the Chairman of their Audit Committee) since March 24, 2006. He also served on the Board of Directors of ILOG S.A., a software company, from December 2000 to December 2008. He served as Director of Soapstone Networks Inc. from June 1997 to July 31, 2009, and as its Chairman since May 26, 2005. On August 10, 2011, he notified the Company that he would not stand for re-election at the 2011 Annual meeting of Stockholders to be held on November 16, 2011. Other positions he has held or continues to hold are: Chief Executive Officer of Linguateq, Inc.; Managing Director of Veronis Suhler Stevenson (alternate name Veronis, Suhler & Associates Inc.), from June 1995 to August 2001. Director of Internet Communications Corp., since May 1997; Chairman and as Director of Wyndstorm Corporation and has been a Director of JDSU (formerly, JDS Uniphase Corp.) since November 2001; Director of Agility Communications, Inc. since November 2001; Vice Chairman of the WPAS (Washington Performing Arts Society); Director of Syndeo Corporation and CAS Communications, Inc.; Director of Precision Systems, Inc., St. Petersburg, Rare Medium Group, Florida (telecommunications) and Richardson, TX (manufacturing communications); Director of Koor Industries Ltd.; Independent Director at BTI Systems Inc. (formerly BTI Photonic Systems Inc.); Independent Director of White Rock Networks, Inc.; Director of Geotek Communications, Inc. since 1995; a Director of ECI Telecom Ltd., an Israel based telecommunications Equipment Company, since May 2002; Director of Qwest Communications International, Inc., from 1995 to 2000; Director at First Avenue Networks Inc.; Director at Transworld Communications and Transmedia Communications; Member of Advisory Board at Greenwich Technology Partners, Inc.; a Member of the Board of Directors of Internet Photonics , Alcatel-Lucent Holding Inc., FiberTower Corporation , Linguateq, Inc., SkyTerra Communications Inc. Mobile Satellite Ventures, LP , Rapid5 Networks, Inc.; Ucentric Systems Inc., Ceyba Inc., TPC Liquidation Inc.; a Member of Advisory Board of Polaris Venture Partners, Inc. and Telesoft Partners; and as a Member of the Supervisory Board of KPNQwest N.V. He also served as a Member of the Board of Directors of Sylantro Systems Corporation, at Telera Corporation, Alcatel Network Systems, Inc., Visiting Nurse Service of New York, and Scholz Master Builders.