EXHIBIT 4.1 AMENDMENT ("Amendment") dated as of October 18, 2002 between FIBERNET TELECOM GROUP, INC. ("Company") and SDS MERCHANT FUND, L.P. ("SDS") to that certain Promissory Note dated as of March 14, 2002 (as amended by the Amendments dated as of...Promissory Note Amendment • October 18th, 2002 • Fibernet Telecom Group Inc\ • Telephone communications (no radiotelephone) • New York
