May 25, 2002 Int’l Submarine Cable Network In KT (Status and Plan) Int’l Submarine Cable Network In KT (Status and Plan) “The Value Networking Company”

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

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 Introductions

4 4 Introduction  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 General Features of Submarine Cables

5 5 Introduction Role of Submarine Cables for International Telecommunication in Korea  Major Infrastructure of International Telecommunication YearSatellites Submarine Cables %20% %56% 20013%97%

6 6 Introduction Procedure of Submarine Cable Construction Demand Forecast Traffic Pattern Study C&MA and Contract Singing among the Committed Parties RFS Service Launch MOU among the Interested Parties 2 ~ 3 years C&MA Preparation - Cost allocation - Investment Principle - Method of Operation Contract Preparation - Supplier Selection - Technical and commercial negotiation 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 Site Survey Necessary License and permit Environmental Investigation Cable Laying Equipment Installation Test

7 7 Introduction Basic Structure of Submarine Cable Domestic Network Supervisory Equipment Power Feed EQ. Repeater Terminal Station B Terminal Station C Branching Unit Terminal Station A Beach Manhole Terminal Equipment Domestic Equipment

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

9 9 Introduction Special Equipments for Construction (Plough) The Plough is designed for the installation and burial submarine cables at same time to protect the cable

10 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.

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

12 International Submarine Cable Submarine Cables in the World

13 International Submarine Cable Submarine Cables in North East Asia

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

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

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

17 Korea-Japan Cable Network KJCN Map

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

19 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

20 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 Future Plan

21 Trends of Submarine Cable Technology  Development of 10Gbps/ big bandwidth transmission technology - Commercializing 128DWDM at Trans-Pacific(9,000Km) is possible within 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 Future Plan

22 Future Plan Expansion of Submarine Cable Capacity

23 Construction of additional Trans-Pacific Cable Network Future Plan  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.)

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

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

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

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

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

29 Thank you … Sung-In KIM Manager Int’l Network Planning & Management Team WorldCup/Int’l Telecommunication Business Center Network Planning & Coordination Group KT Corporation Tel: Sung-In KIM Manager Int’l Network Planning & Management Team WorldCup/Int’l Telecommunication Business Center Network Planning & Coordination Group KT Corporation Tel: