October 5, 2000 DEUTSCHE BANK SECURITIES INC. U.S. BANCORP PIPER JAFFRAY INC. DAIN RAUSCHER INCORPORATED As Representatives of the Several Underwriters c/o Deutsche Bank Securities Inc. One South Street Baltimore, Maryland 21202 Ladies and Gentlemen:...Convertible Debt Underwriting Agreement • October 12th, 2000 • Natural Microsystems Corp • Telephone & telegraph apparatus • Maryland
