EXHIBIT 1 AMENDMENT NO. 3 TO THE RIGHTS AGREEMENT OF PICTURETEL CORPORATION This Amendment No. 3, dated as of May 24, 2001, amends the Rights Agreement dated as of March 25, 1992 (as amended to date, the "RIGHTS AGREEMENT"), between PictureTel...Picturetel Corp • June 18th, 2001 • Telephone & telegraph apparatus • Delaware
