EXHIBIT 4.1 =================================================================== ============= AMSC ACQUISITION COMPANY, INC. SERIES A AND SERIES B 12 1/4% SENIOR NOTES DUE 2008Indenture • May 15th, 1998 • Amsc Acquisition Co Inc • Communications services, nec • New York
Contract Type FiledMay 15th, 1998 Company Industry Jurisdiction
WARRANT AGREEMENTWarrant Agreement • May 15th, 1998 • Amsc Acquisition Co Inc • Communications services, nec • New York
Contract Type FiledMay 15th, 1998 Company Industry Jurisdiction
WARRANT REGISTRATION RIGHTS AGREEMENTWarrant Registration Rights Agreement • May 15th, 1998 • Amsc Acquisition Co Inc • Communications services, nec • New York
Contract Type FiledMay 15th, 1998 Company Industry Jurisdiction
UNIT AGREEMENT AmongUnit Agreement • May 15th, 1998 • Amsc Acquisition Co Inc • Communications services, nec
Contract Type FiledMay 15th, 1998 Company Industry
PLEDGE AND SECURITY AGREEMENTPledge and Security Agreement • May 15th, 1998 • Amsc Acquisition Co Inc • Communications services, nec • New York
Contract Type FiledMay 15th, 1998 Company Industry Jurisdiction
EXHIBIT 4.3 =================================================================== ============= DEBT REGISTRATION RIGHTS AGREEMENT MARCH 31, 1998 by and among AMSC ACQUISITION COMPANY, INC., THE GUARANTORS NAMED ON THE SIGNATURE PAGES HERETODebt Registration Rights Agreement • May 15th, 1998 • Amsc Acquisition Co Inc • Communications services, nec • New York
Contract Type FiledMay 15th, 1998 Company Industry Jurisdiction