Directors and Executive Officers of the Registrant (continued)

MR. TURNER, a co-founder of Natural MicroSystems, has served as our Senior Vice President of Technology since 1994. He served as Vice President of Operations from 1983 to 1994.

MR. BRAVERMAN has served as our Vice President and Corporate Controller since February 1999. From 1994 to 1998, Mr. Braverman held senior financial executive positions at Concentra Corporation, a developer of sales and engineering software automation products, most recently as Vice President, Chief Financial Officer and Treasurer. From 1988 to 1994, Mr. Braverman was Controller of Artel Communications Corporation, a manufacturer of networking products.

MS. CALLAN has served as our Vice President and General Counsel since April 1997. She was Deputy General Counsel of Lotus Development Corporation from 1986 to 1996.

MR. CARNEY has served as our Vice President of Marketing since April 1996. From 1992 to 1996, Mr. Carney held various marketing positions including Vice President, Applications Marketing and Vice President of International Marketing at Lotus Development Corporation. From 1982 to 1992, Mr. Carney held various marketing positions including Vice President, European Operations with Atex, Inc., a turnkey supplier of pre-press automation systems.

MR. HUGHES has served as Vice President of Business Development since October 1999. He joined Natural MicroSystems in 1997 as part of the acquisition of ViaDSP, Inc., which he founded in 1996 and of which he served as President. Mr. Hughes was a founder of DSP Software Engineering in 1989 and served as its Vice President of Consulting until 1996.

MR. TOALE has served as our Vice President, Human Resources since August 1998. From 1984 to 1998 he held various positions in human resources for Digital Equipment Corporation, most recently Vice President, Human Resources for Digital’s AltaVista division.

MR. WALKER, Vice President and General Manager of the PolicyPoint Division, joined Natural MicroSystems in December 1999 as part of its acquisition of QWES.com, Inc., which he founded in April 1998 and of which he served as Chairman, President and Chief Executive Officer. Prior to founding QWES, he was Senior Vice President of Engineering at Ascom Timeplex. He joined Ascom Timeplex in 1990 as part of its acquisition of Doelz Networks, a pioneering company of asynchronous transfer mode technology, which he founded in 1977 and of which he was Vice President of Engineering. Mr. Walker is also a director of ASI Wireless Inc., a provider of support services for wireless service providers.

MR. HUTCHESON has served as a director of Natural MicroSystems since 1989. He has been, since September 1998, a general partner of St. Paul Venture Capital, a venture capital firm. From 1982 to 1998, Mr. Hutcheson was president of Hutcheson & Co., Inc., a management consulting firm.

DR. KING has served as a director of Natural MicroSystems since 1997. He has been, since November 1998, a private investor. From 1992 to 1998, he was Chief Executive Officer of PSW Technologies, Inc. (formerly a division of Pencom, Inc.), a provider of software services. From 1988 to 1992, Dr. King was Senior Vice President of Development of Lotus Development Corporation, and for the previous 19 years he served in various positions with IBM Corporation, including his last position as Vice President of Development for the entry system division. He is also a director of Auspex Systems, Inc., a provider of network-attached storage devices; eOn Communications Corporation, formerly known as Cortelco Systems, Inc., a provider of telecommunications applications; Excalibur Technologies Corporation, a developer of document management software; PSW Technologies, Inc.; Best Software, Inc., a supplier of corporate resource management software solutions; and Perficient, Inc., a provider of virtual professional services organizations to Internet software companies.

MS. REEVE has served as a director of Natural MicroSystems since 1997. She has served, since September 1993, as Chief Executive Officer and a director and, from 1989 to September 1993, as President, Chief Operating Officer and a director of Lightbridge, Inc., a provider of products and services which enable wireless telecommunications carriers to improve customer acquisition and retention processes. From 1978 to 1989, she was with The Boston Consulting Group, a management consulting firm. Ms. Reeve is a director of WebLink Wireless, Inc., formerly known as PageMart Wireless, Inc., a provider of wireless messaging services.

MR. WHITE has served as a director of Natural MicroSystems since 1988. Since October 1997, he has been a partner of GSM Capital, a venture capital fund focused on wireless technology. Since 1983, Mr. White has been a partner of Advanced Technology Development Fund, a venture capital firm. Mr. White is also a director of Preferred Networks, Inc., a provider of paging services.