. . . Exhibit 4.53 SECOND AMENDMENT OF THE SUPPLY CONTRACT FOR THE PROCUREMENT AND INSTALLATION OF RING JASUKA BACKBONE NO. K. TEL. 61/HK.920/UTA-00/2006, DATED 16 MARCH 2006 Parties: 1. TELKOM; and 2. NEC - Siemens Consortium ("NSC"). Preceding Contracts: 1. Supply Contract for Ring JASUKA Backbone No. K.TEL.93/HK.910/UTA-00/2005 dated 10 June 2005; 2. First Amendment of Main Contract No. K.TEL 10/HK.920/UTA-00/2006, dated 6 February 2006. Scope of Works: The Parties in the Design Review Meeting for Ring JASUKA Backbone on 21 - 22 June 2005, 1-5 August 2005 and 29 - 31 August 2005, agreed to amend the scope of works as implemented in the main contract which shall include but not limited to: 1. Change of specification of marine route survey and marine installation; 2. Change of cable length according to land and marine route survey; 3. Change of traffic matrix; 4. Addition of transponder; 5. Change of power supply; and 6. Change of Training. Time for Completion: 1. Each Sub-system of RING-I shall be completed within two hundred fifty six (256) days from EDC for Sub-system #1 - #3 or not later than 21 February 2006; 2. Each Sub-system of RING-II shall be completed within two hundred eighty four (284) days from EDC for Sub-system #1 or not later than 21 March 2006 and within three hundred forty five (345) days from EDC for Sub-systems #2 - #4 or not later than 21 May 2006. Term of Payment: The payment shall be made through direct transfer. Transfer fee shall be the responsibility of NSC.