International Submarine Cable Network www.AssignmentPoint.com 1

Table of Contents 2. International Submarine Cables 1. Introductions 2. International Submarine Cables 3. Korea-Japan Cable Network (KJCN) 4. Benefit of KJCN 5. Future Plan

Introductions 2. Basic Structure of Submarine Cable 1. General Features of Submarine Cable 2. Basic Structure of Submarine Cable 3. Role of Submarine Cable 4. Procedure of Submarine Cable Construction 5. Special Equipments for Construction

General Features of Submarine Cables Introduction General Features of Submarine Cables Long Distance Transmission Capability - Trans-Pacific and Trans-Atlantic Big Bandwidth Transmission Capability - Suitable for Internet, Video Streaming High Reliability - Suitable for international e-commerce business State of Art Technology - High Quality Service 1

Role of Submarine Cables for International Telecommunication in Korea Introduction Role of Submarine Cables for International Telecommunication in Korea Major Infrastructure of International Telecommunication Year Satellites Submarine Cables 1990 80% 20% 1995 44% 56% 2001 3% 97%

Procedure of Submarine Cable Construction Introduction Procedure of Submarine Cable Construction 2 ~ 3 years Demand Forecast Traffic Pattern Study MOU among the Interested Parties C&MA and Contract Singing among the Committed Parties RFS Service Launch C&MA Preparation - Cost allocation - Investment Principle - Method of Operation Contract Preparation - Supplier Selection - Technical and commercial negotiation Site Survey Necessary License and permit Environmental Investigation Cable Laying Equipment Installation Test

Basic Structure of Submarine Cable Introduction Basic Structure of Submarine Cable Domestic Network Beach Manhole Branching Unit Terminal Station C Domestic Equipment Terminal Equipment Repeater Terminal Station B Supervisory Equipment Power Feed EQ. Terminal Station A

Special Equipments for Construction (Cableship Segero) Main Particulars Launch : 1998.4 Gross Ton : 8,300 T Length :115.8m Beam : 20m Accommodation: 63 Endurance : 12,000nm

Special Equipments for Construction Introduction Special Equipments for Construction (Plough) The Plough is designed for the installation and burial submarine cables at same time to protect the cable

Special Equipments for Construction Introduction Special Equipments for Construction (ROV) Remotely operated vehicles (ROV), plough typed vehicle, can be used for the difficult working area like the junction of cables and of re-burial working after repairing the present cables.

International Submarine Cable 1. Submarine Cable Maps - World Cable Map - North East Asia Cable Map 2. Submarine Cables Landed in Korea

International Submarine Cable Submarine Cables in the World

International Submarine Cable Submarine Cables in North East Asia

International Submarine Cable Cables Landed in Korea (1) Nahodka (Russia) RJK Naoetsu (Japan) H-U Cable Seoul CKC Boeun E/S Qindao(China) Kumsan Taeahn C/S Busan Keoje KJCN Fukuoka/Kitakyushu(Japan) Cheju FLAG Ninomya(Japan) HJK Miura(Japan) D.W.B(Hong Kong) SMW-3 Okinawa(Japan) FLAG SHI(China) APCN LTU(Hong Kong) Miyazaki(Japan) SMW-3 SHI(China) HJK Chikura(Japan) LTU(Hong Kong) APCN China-US Bandon(US) China-US CHM(China) APCN 2 APCN 2 Kitaibaraki(Japan) SHI(China)

International Submarine Cable Cables Landed in Korea (2) Cable Station Name Path Length Capacity (Structure) RFS Busan RJK Russia-Japan-Korea 1,762Km 560Mbps x 2 1995. 1 APCN Korea-Japan-Hongkong-Taiwan- Philliphine-Malaysia-Singapore- Indonesia-Thailand-Austria 12,084Km 20Gbps (5Gx2WDMx2P) 1997. 1 CUCN Korea-Japan-China-Taiwan- Guam-The United States 30,444Km 80Gbps (2.5Gx8WDMx4P) 2000. 1 APCN-2 Korea-Japan-Taiwan-China- Hongkong-Malaysia-Phillipine- Singapore 19,000Km 2.56Tbps (10Gx64WDMx4P) 2001.12 KJCN Korea-Japan 500Km 2.88Tbps (10Gx24WDMx12P) 2002. 3 Jeju HJK Hongkong-Japan-Korea 4,587Km 280Mbps 1990. 5 Keoje FLAG South east Asia-Middle east- Western Europe (14 countries) 29,000Km 10Gbps (5Gx2P) 1997. 4 SMW-3 (33 countries) 39,000Km 40Gbps (2.5Gx8WDMx2P) 1999.12 Taeahn CKC China-Korea 549Km 1996. 1

Korea-Japan Cable Network 1. KJCN Map 2. KJCN General 3. Advantages of KJCN

Korea-Japan Cable Network KJCN Map

Korea-Japan Cable Network KJCN General KJCN Route : Busan-Fukuoka, Busan-Kitakyushu Participants : KT, NTT, Japan Telecom, KEPCO C&MA Signing : 2001.5.25 Supply Contract (Fujitsu) : 2001.5.25 Total Length : 500Km Number of Fiber Pair : 12 RFS : 2002. March KEPCO: Kyushu Electric Power Co., RFS: Ready For Service C&MA: Construction and Maintenance Agreement

Korea-Japan Cable Network Advantages of KJCN Continuous Competitiveness of the Network - No need for Repeater due to the Short distance - Applying cutting edge technology is possible at any time Exclusive connection between Korea and Japan - Cheap Cost - But, high quality and cheap service Highly stable network by Self-healing function - Stable telecommunication Services - Internet and e-commerce application

Future Plan 2. Expansion of Submarine Cable Capacity 1. Trends of Submarine Cable Technology 2. Expansion of Submarine Cable Capacity 3. Construction of additional Trans-Pacific Cable Network 4. KT’s International Service

Trends of Submarine Cable Technology Future Plan Trends of Submarine Cable Technology Development of 10Gbps/ big bandwidth transmission technology - Commercializing 128DWDM at Trans-Pacific(9,000Km) is possible within 2004 - Under development to apply 40Gbps/ at Trans-Pacific Migration to Wavelength access - Optimizing cable network to reduce the cost - Adopting NG-SDH platform, such as MSPP

Expansion of Submarine Cable Capacity Future Plan Expansion of Submarine Cable Capacity

Construction of additional Trans-Pacific Future Plan Construction of additional Trans-Pacific Cable Network Next cable project - High demand toward America (Sharp increase of High speed Internet in Asia region) - Under review to participate in new project Outlook - Unavoidableness of postponement - Decreasing demand by World IT economic slump (except Korea, China, Taiwan, etc.)

Future Plan KT’s International Service Major service(Current) Int’l ATM Service IP Transit Service Int’l Intelligent Service IPLC Service Global Transit Service Int’l Telephone Service KT International Network Earth Station Cable Station Int’l Gateway

Future Plan Global package solution(Next) KT America KT Japan Connectivity IP Transit, IP VPN, ATM, F/R VLAN, Ethernet Hosting Co-location, Hosting, Managed Service Streaming, Contents Delivery Contents Distribution KT London Others

Future Plan Global presence Overseas Office Local Corporation or NTC(Bladivostok) Capital Inv. London Mongolia Telecom Capital Inv. Geneva KT Japan (Tokyo) KTAI (LA) KT America (New York) Beijing Hanoi KT Philippines Inc. Thailand Representative PIEM INTERNATIONAL Vietnam BCC capital investment Overseas Office Local Corporation or Capital Investment

Future Plan Internet backbone(5Gbps) – Upgraded to 7Gbps Russia( 6M ) EU( 155M ) U.S.A(3.875G) EU(155M) Japan( 665M ) China( 200M ) Kornet POP in US LA San Jose Palo Alto New York Vienna Taiwan( 200M ) Hong Kong( 155M ) Vietnam( 0.5M ) Thailand( 2M ) Philippine( 0.5M ) Malaysia( 2M ) Malaysia( 2M ) Singapore( 45M ) Singapore( 45M ) Indonesia( 2M ) Indonesia( 2M ) Australia( 10M ) Australia( 12M )

Peering with 30 major ISP such as Telecom Italia, Belgacom, Future Plan ISP connectivity Yahoo KORNET London Peering with 30 major ISP such as BT, DT, FT, Telefonica, Telecom Italia, Belgacom, PAIX net PAIX net MSN KORNET PAIX (Paloalto) KORNET PAIX (Vienna) KORNET New York Exodus Sprint KORNET San Jose KORNET LA UUNet Concert Teleglobe Abovenet KORNET Global Gate Vietnam VDC Australia Telstra Optus Indonesia Indosat Thailand CAT Malaysia TM Japan NTT ,C&W IDC, KDDI ,JT Russia Rostel Current Facility Planned Facility Philippines PLDT Singapore SingTel China CT Taiwan CHT