1. Status of Implementation TCP/IP at RTH Beijing NMIC, CMA

2. CBS ET-CTS meeting, Toulouse, France, 26-30 May 20082 New upgrade Link to Pyongyang Link to Pyongyang –ASYNC, 75 Baud -> IP, 64kbps Link to Bangkok Link to Bangkok –X.25, 9.6kbps -> IP, 64kbps Links to Offenbach, Tokyo, Moscow, New Delhi Links to Offenbach, Tokyo, Moscow, New Delhi –FR -> MPLS –256kbps -> 2Mbps New connection RTH Beijing - EUMETSAT RTH Beijing - EUMETSAT –Established over MPLS VPN in July, 2007

3. CBS ET-CTS meeting, Toulouse, France, 26-30 May 20083 TCP/IP implementation status Link to Connection type Speed Routing protocol Transmission procedures Exchanged data Offenbach MPLS VPN (OBS service) 2MbpsBGP FTP (put) GTS messages TokyoBGP TCP sockets GTS messages FTP (put) Satellite data FTP (get) NESDIS ATOVS data (Tokyo->Beijing) MoscowBGP FTP (put) GTS messages CMA Satellite data(Beijing->Moscow) New Delhi BGP FTP (put) GTS messages EUMETSATBGP FTP (put) Satellite data Bangkok Leased line 64KbpsBGP FTP (put) GTS messages Seoul Frame Relay 32/32kbpsBGP TCP sockets GTS messages FTP (put) Observations(Beijing->Seoul) Pyongyang Leased line 64KbpsStatic FTP (put) GTS messages Ulan Bator Leased line Static FTP (put) GTS messages CMA Satellite data (Beijing->UB) Hanoi Leased line (ASYNC) 75Baud * Hong Kong, Macao connected with Beijing via Guangzhou

4. CBS ET-CTS meeting, Toulouse, France, 26-30 May 20084 File naming conventions WMO file naming conventions WMO file naming conventions –Messages with AHL CCCCNNNNNNNN.a, CCCCNNNNNNNN.b, CCCCNNNNNNNN.f CCCCNNNNNNNN.a, CCCCNNNNNNNN.b, CCCCNNNNNNNN.f –Satellite data CMA satellite data: pflag=A CMA satellite data: pflag=A RARS data: pflag=Z RARS data: pflag=Z Other file naming conventions Other file naming conventions –NESDIS ATOVS data filename convention –Filename conventions used for EUMETCast and FENGYUNCast –CMA filename conventions (for bilateral data exchange)

5. CBS ET-CTS meeting, Toulouse, France, 26-30 May 20085 Internet connection 1Gbps access rate, 130Mbps protocol rate Two access lines for redundancy Exchanging the operational data and TIGGE data1Gbps access rate, 130Mbps protocol rate Two access lines for redundancy Exchanging the operational data and TIGGE data

6. CBS ET-CTS meeting, Toulouse, France, 26-30 May 20086 Usage of Internet UsageRemarks GTS main  Exchanging GTS messages with RTH Melbourne via ftp  Collecting GTS messages from NMC Almaty via Email GTS backup  Backup the GTS traffic between RTH Beijing and RTH Offenbach Data collection  Collecting NCEP GFS products from RTH Washington via ftp TIGGE project  Exchanging TIGGE data with ECMWF and NCAR via LDM

7. CBS ET-CTS meeting, Toulouse, France, 26-30 May 20087 Future plans Establish backup connection to the MTN links through Internet VPN Establish backup connection to the MTN links through Internet VPN –Participating the IPSec-based VPN test organized by ECMWF Upgrade the Beijing-Hanoi GTS connection from the current ASYNC circuit to an IP link Upgrade the Beijing-Hanoi GTS connection from the current ASYNC circuit to an IP link