Status of the Global Telecommunication System connected with RTH Tokyo Japan Meteorological Agency Presented by Masahiro Kazumori Eighth Meeting on Asia-Pacific Satellite Data Exchange and Utilization (APSDEU-8) (Montréal, Canada, 10 to 12 October 2007)

1. Current status of the GTS -MTN- Exeter Sofia Network II Melbourne Buenos Aires Tokyo Beijing Nairobi Washington 2007 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 the gateways interconnecting Networks I and II As one of the RTHs on the MTN….

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

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 64 kbps Dedicated line connections BT FR Network (Cloud I) 1.5 Mbps 256 kbps 1.5 Mbps Improved MTN (Two Seamless Networks) 1Mbps 2 Mbps Hong Kong Bangkok OBS MPLS Network (Cloud II) MTN All links are being operated on TCP/IP basis. Six of nine are IP over Frame Relay. Two of nine are MPLS. New Delhi Beijing Regional Telecommunication Hub (RTH) Tokyo Manila KDDI FR Network CAT HKT DACOM 64kbps PLDT FR Network 128 kbps Regional circuits

4. Traffic status of the Tokyo-Washington link 26 Mbytes/day 50% of CIR CIR=32kbps CIR=768kbps Tokyo FR Washington 1.5Mbps 847 Mbytes/day 50% of CIR

5. Traffic status of the Tokyo-Melbourne link CIR=16kbps CIR=32kbps Tokyo FR Melbourne 256kbps 1.5Mbps 179 Mbytes/day 100% of CIR 89 Mbytes/day

6. Traffic status of the Tokyo-Beijing link Tokyo MPLS Beijing 2 Mbps 1 Mbps 333 Mbytes/day 147 Mbytes/day

7. Traffic status of the Tokyo-Seoul link CIR=16kbps Tokyo FR Seoul 64kbps192kbps FR 100% of CIR 157 Mbytes/day 1.5 Mbytes/day

8. Traffic status of the Tokyo-Hong Kong link Tokyo FR Hong Kong 64kbps192kbps FR CIR=16kbps 0.48 Mbytes/day 212 Mbytes/day 64kbps line

Major functions supporting GTS operations + Message and Fax exchanges by both socket and so-called batched ftp through GTS + File exchanges by ftp through GTS + Collection of observational data by via the Internet Message/File Switching System Intranet systems NWP system 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 links GTS links cluster control Interne t 9.GTS facilities in RTH Tokyo -Conceptual design- Central telecommunication facility in JMA was fully replaced in October The new GTS switching system is composed by two UNIX servers in a cluster.

10. JMA Internet Connection DMZ Load Balancer Public Servers JMA Intra- net ISP #1 Router Controllers Firewalls Packet Shapers 20Mbps Internet ISP #2 20Mbps Multi-homed connections for reliability FTP Servers Multi-homed connections to Internet with two dedicated links since 2001 Two 20 Mbps links in operation: one since February 2005, the other since March

Thank you for attention