EXHIBIT 4.3 RIGHTS AGENCY AGREEMENT RIGHTS AGENCY AGREEMENT (this "Agreement"), dated as of , 2005, between EMBRATEL PARTICIPACOES S.A. (the "Company"), a Brazilian corporation, and THE BANK OF NEW YORK, a New York banking corporation (the "Rights...Rights Agency Agreement • December 23rd, 2004 • Embratel Participacoes Sa • Telephone communications (no radiotelephone) • New York
