FIRST SUPPLEMENTAL INDENTURE (CONVERTIBLE NOTES) FIRST SUPPLEMENTAL INDENTURE (the "First Supplemental Indenture"), dated as of October 10, 1996 between WinStar Communications, Inc., a Delaware corporation, as Issuer (the "Company") and United States...First Supplemental Indenture (Convertible Notes) • November 14th, 1996 • Winstar Communications Inc • Telephone communications (no radiotelephone) • New York
