1 EXHIBIT 10.13 SECOND AMENDMENT dated as of March 8, 2000 (this "Amendment") to the Credit Agreement dated as of June 29, 1999, as amended (the "Credit Agreement") by and among LEXENT INC. (formerly known as National Network Technologies, Inc.), a...Credit Agreement • March 29th, 2000 • Lexent Inc • Services-telephone interconnect systems • Delaware
