. . . Exhibit 4.52 FIRST AMENDMENT TO SUPPLY CONTRACT FOR THE PROCUREMENT AND INSTALLATION OF RING JASUKA BACKBONE NO. K.TEL 10/HK920/UTA-00/2006 DATED 6 FEBRUARY 2006 The Parties: 1. TELKOM; 2. NEC-SIEMENS CONSORTIUM. Preceding Agreements: Supply Contract No. KTEL.93/HK.910/UTA-00/2005 dated 10 June 2005. Amended Provisions: The parties agree to amend technical provisions on the project manager to become as follows: "Project Manager was appointed by TELKOM who shall be duty authorized and to act for and on behalf of TELKOM in the execution of the Project is Head of TELKOM Construction Center (KAPUS CC)"; The parties agree to amend provision on TELKOM address to become as follows: TELKOM Project Manager for Ring Jasuka Backbone PT TELEKOMUNIKASI INDONESIA Tbk. Head of Telkom Construction Center Telkom Building 6th Floor Jalan Japati Nomor 1 Bandung - 40133, Indonesia Phone: (022) 7209022 Fax No.: (022) 7206530 CC: Director of Network and Solution