1. Features of the new TCP/IP link between HK and Beijing (Guangzhou) Features of the new TCP/IP link between HK and Beijing (Guangzhou) Justin Waiman MA Hong Kong, China ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008

2. Hong Kong – Beijing Circuit  Link established since early 70 ’ s  Routed through Guangzhou  Original bandwidth 64kbps DDN link  IP-based, FTP  Meteorological data exchange – global, regional and local (Guangzhou) ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008

3. Hong Kong –Beijing Circuit Hong Kong ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008

4. Vientiane Yangon Hanoi Phnom Penh PyongYang Macao Seoul 14.4-28.8K (V.34) 64K 1200 50 100 9.6K Offenbach Moscow Kuala Lumpur Novosibirsk Khabarovsk Bangkok F/R CIR F/R CIR Washington 64K Singapore Hong Kong F/R CIR Tokyo IMTN-MDCN CIR Manila ISDN 128K 28.8-9.6K (V.34) via Moscow 14.4-28.8K (V.34) 768K 64K Ulaanbaatar 14.4K Melbourne IMTN-MDCN CIR 32K CMA PCVSAT 64K 75 CMA PCVSAT CMA PCVSAT IMTN MDCN MPLS IMTN MDCN MPLS IMTN MDCN MPLS Beijing 2M 1M 2M 1M 128K Internet F/R CIR F/R CIR F/R CIR F/R CIR EUMETSAT MPLS 2M Part of the RAII Regional Meteorological Telecommunication Network as of 15 December 2007

5. Feature of the new HK-GZ Link ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008  Implemented on 22 May 2008  4M guaranteed bandwidth both upstream and downstream  60 times faster than the original one  Ethernet based interface  Bandwidth partitioning by QoS at router level  Support Multi-Points solution for extend to other sites in the future.

6. Guangdong Meteorological Bureau International Ethernet Hong Kong Observatory Server Video Conference Unit 4M MSTP CISCO2821 Fire Wall Server Video Conference Unit Fire Wall / DMS 4M Metro Ethernet 4M Server Server HK-GZ GTS network connection ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008

7.  Local access network: Metro-Ethernet  Core network: International Ethernet Service delivery over VPLS (Virtual Private LAN Service) based networkService delivery over VPLS (Virtual Private LAN Service) based network Layer 2 private networkLayer 2 private network Provider network acts as a bridgeProvider network acts as a bridge Advantages:Advantages:  LAN environment  Multipoint to multipoint  Flexible bandwidth allocation which ranges from 1Mbps to 1Gbps HK-GZ GTS network connection ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008

8.  Technology: SDH (Synchronous Digital Hierarchical) over optical fibre  Topology: Ring High resilienceHigh resilience Self healingSelf healing Physical layer Setting ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008

9. Physical layer ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008

10. Current Status and Looking Forward  Being use for real time meteorological data exchange  Planned to configure for different channels for large volume data exchange (e.g. raw radar data) and video conferencing ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS) TOULOUSE, France, 26 - 30 MAY 2008