1. International Submarine Cable Network 1

2. 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

3. 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

4. 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

5. 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%

6. 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

7. 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

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

9. 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

10. 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.

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

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)
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)

15. 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
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)
Jeju
HJK
Hongkong-Japan-Korea
4,587Km
280Mbps
Keoje
FLAG
South east Asia-Middle east-
Western Europe
(14 countries)
29,000Km
10Gbps
(5Gx2P)
SMW-3
(33 countries)
39,000Km
40Gbps
(2.5Gx8WDMx2P)
Taeahn
CKC
China-Korea
549Km

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

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. 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

21. 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

22. Expansion of Submarine Cable Capacity
Future Plan
Expansion of Submarine Cable Capacity

23. 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.)

24. 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

25. 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

26. 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

27. 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 )

28. 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