1. Status of the Global Telecommunication System connected with RTH Tokyo Sixth Meeting on Asia-Pacific Satellite Data Exchange and Utilization (APSDEU-6) (KMA: Seoul, 1 to 3 June 2005) Japan Meteorological Agency Akihiko NAKAZONO Office of International Communications

2. 1. Current status of the GTS -MTN- Exeter Sofia Network II Melbourne Buenos Aires Tokyo Beijing Nairobi Washington XI-2004 Network I Jeddah Prague Toulouse Dakar Algiers Offenbach Brasilia Cairo Managed data communication network New Delhi Moscow Network I Tokyo has connectivity with four centers on the MTN Tokyo is one of gateways interconnecting Networks I and II AS one of the RTH on the MTN….

3. 2. Current status of the GTS -Region II (Asia)-

4. 3. GTS links connected with RTH Tokyo Tokyo Manila Bangkok New Delhi Beijing Hong Kong Khabarovsk Seoul Melbourne Washington Melbourne 192kbps 64kbps Frame Relay (FR) Network-to-network Interconnections 128kbps Seoul Khabarovsk 14.4 -28.8 kbps Dedicated line connections BT FR Network (Cloud I) 1.5 Mbps 256 kbps 1.5 Mbps Improved MTN (Two Seamless Networks) 128 kbps 256 kbps Hong Kong Bangkok Equant FR Network (Cloud II) MTN All links are being operated on TCP/IP basis. Eight of nine are IP over FR. New Delhi Beijing Regional Telecommunication Hub (RTH) Tokyo Manila KDDI FR Network CAT HKT DACOM 64kbps PLDT FR Network 64 kbps Regional circuits

5. 4. Traffic status of the Tokyo-Washington link CIR=32kbps CIR=768kbps Tokyo FR Washington 1.5Mbps 27kbps line (83% of CIR) 23 Mbytes/day 533 Mbytes/day Tokyo to Washington (9 May 2005) Washington to Tokyo (9 May 2005) 233kbps line (30% of CIR)

6. 5. Traffic status of the Tokyo-Melbourne link CIR=16kbps CIR=32kbps Tokyo FR Melbourne 256kbps 1.5Mbps Tokyo to Melbourne (9 May 2005) Melbourne to Tokyo (9 May 2005) 16kbps line (100% of CIR) 23kbps line (73% of CIR) 85 Mbytes/day 32 Mbytes/day

7. 6. Traffic status of the Tokyo-Beijing link CIR=48kbps Tokyo FR Beijing 256kbps 128kbps CIR=48kbps Tokyo to Beijing (9 May 2005) 1kbps line (2% of CIR) 23kbps line (49% of CIR) Beijing to Tokyo (9 May 2005) 47 Mbytes/day 2.5 Mbytes/day

8. 7. Traffic status of the Tokyo-Seoul link CIR=16kbps Tokyo FR Seoul 64kbps192kbps FR 16kbps line (100% of CIR) Seoul to Tokyo (9 May 2005) Tokyo to Seoul (9 May 2005) 122 Mbytes/day 40kbps line (250% of CIR) 0.5kbps line (3% of CIR) 1.2 Mbytes/day

9. 8. Traffic status of the Tokyo-Hong Kong link CIR=16kbps Tokyo FR Hong Kong 64kbps192kbps FR Tokyo to Hong Kong (9 May 2005) 209 Mbytes/day 60kbps line (94% of access circuit at Hong Kong) 16kbps line (100% of CIR) 0.2kbps line (1.3% of CIR) 0.4 Mbytes/day Hong Kong to Tokyo (9 May 2005)

10. 9.GTS facilities in RTH Tokyo Current Message Switching System (MSS) and FAX Exchange system started operation in March 1996. They, especially MSS, are now nearing the limits in handling data volume and processing load. FTP servers have still enough capacity to expand the satellite data exchange. Japan Meteorological Agency (JMA) is to replace them by new ones in October 2005 in consideration of expansion and improvement of information exchange. FTP traffic GTS links Message Switching System FAX ExchangeS ystem FTP Servers Message & Fax traffic

11. 9-2. Concept design of the new MSS at RTH Tokyo Message Switching System Intranet systems NWP system MSS Functions + Message and FAX exchanges by both socket and so-called batched ftp through GTS + File exchange by ftp through GTS + Collection of observational data by e-mail via the Internet Back-end system UNIX Operating system CPU 1.9GHz X 4 Memory 8GB UNIX Operating system CPU 1.9GHz X 4 Memory 8GB Message editing Fax format conversion BUFR encode & decode WMO monitoring Shared disk GTS GTS cluster control Interne t

12. 10. JMA Internet Connection DMZ Load Balancer FTP Servers Public Servers JMA Intra- net ISP #1 Router Controllers Firewalls Packet Shapers 20Mbps Internet ISP #2 8Mbps Multi-homed connections for reliability

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