EXHIBIT 4.5 FIRST SUPPLEMENTAL INDENTURE Dated as of May 19, 1999 by and among TELEHUB COMMUNICATIONS CORPORATION, as Issuer, TELEHUB NETWORK SERVICES CORPORATION, TELEHUB TECHNOLOGIES CORPORATION, and TELEHUB LEASING CORPORATION, as Guarantors,First Supplemental Indenture • June 2nd, 1999 • Telehub Communications Corp • Telephone communications (no radiotelephone) • New York
EXHIBIT 4.6 PLEDGE AGREEMENT PLEDGE AGREEMENT ("Pledge Agreement"), dated as of May 19, 1999, by and among TELEHUB COMMUNICATIONS CORPORATION, a Nevada corporation ("TCC"), TELEHUB TECHNOLOGIES CORPORATION, a Nevada corporation (("TTC, and together...Pledge Agreement • June 2nd, 1999 • Telehub Communications Corp • Telephone communications (no radiotelephone) • New York
