6,500,000 SHARES SYCAMORE NETWORKS, INC. COMMON STOCK, $.001 PAR VALUE UNDERWRITING AGREEMENT Morgan Stanley & Co. Incorporated J.P. Morgan Securities Inc. Lehman Brothers Inc. Dain Rauscher Wessels, a division of Dain Rauscher Incorporated c/o Morgan...Underwriting Agreement • October 20th, 1999 • Sycamore Networks Inc • Telephone & telegraph apparatus • New York
