EXHIBIT 4 AMENDMENT NO. 2 TO THE RIGHTS AGREEMENT OF PICTURETEL CORPORATIONRights Agreement • July 31st, 2000 • Picturetel Corp • Telephone & telegraph apparatus • Delaware
1 EXHIBIT 1 PICTURETEL CORPORATIONStock Purchase and Investors Rights Agreement • July 31st, 2000 • Picturetel Corp • Telephone & telegraph apparatus • Delaware
