1. Current Status of Implementation of MTN at RTH Beijing Li Xiang National Meteorological Information Center, CMA

2. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20062 GTS links Link to Circuit type SpeedProtocol Offenbach Frame Relay (EQUANT) (EQUANT)48/48Kbps WMO FTP Tokyo Frame Relay (EQUANT) (EQUANT)48/48Kbps WMO sockets FTP Moscow Frame Relay (EQUANT) (EQUANT)8/8Kbps WMO FTP New Delhi Frame Relay (EQUANT)8/8Kbps WMO FTP Bangkok Leased line 9.6KbpsX.25 Seoul Frame Relay 32/32kbps WMO sockets FTP Pyongyang Leased line 75 Baud ASYNC Ulan Bator Leased line 14.4Kbps WMO FTP Hanoi Leased line 75 Baud ASYNC

3. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20063 New Upgrade Beijing-Ulan Bator Beijing-Ulan Bator –Upgraded from 75Baud ASYNC circuit to 14.4kbps IP link in February 2005. Beijing-Moscow Beijing-Moscow –Upgraded from X.25 to IP over FR in April, 2005. Beijing-New Delhi Beijing-New Delhi –Upgraded from X.25 to IP over FR in December, 2005. Beijing-Tokyo Beijing-Tokyo –Beijing ’ s incoming PVC being upgraded from 48kbps to 96kbps for receiving satellite data from Tokyo

4. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20064 Upgrade plan Beijing-Pyongyang Beijing-Pyongyang –Upgrade to 64kbps dedicated line in 2006. Beijing-Bangkok Beijing-Bangkok –tentative plan: move from X.25 to IP in 2006. Beijing-Hanoi Beijing-Hanoi –Upgrade issue being discussed.

5. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20065 Internet connections Beijing-Kazakhstan Beijing-Kazakhstan –established in December 2004 –E-mail Beijing-Melbourne Beijing-Melbourne –established in February 2006 –WMO FTP

6. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20066 GTS system (1) Offenbach Tokyo Moscow New Delhi Seoul Ulan Bator Hanoi Pyongyang Bangkok Asynchronous circuits X.25 circuits IP over FR Cisco PIX Firewall RMDCN Routers Cisco 2620 (HSRP) GTS Router Cisco 3640 IP Front End AlphaServer ES40 Duplicated system UNIX Back End IBM P650 Duplicated system UNIX based MSS Router Cisco PIX Firewall Internet Server Internet DMZ

7. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20067 GTS system (2) Protocols Protocols –FTP –TCP sockets –X.25 –ASYNC –SMTP Maximum length of bulletins Maximum length of bulletins –Currently, 15Kbytes for message exchange 15Kbytes for message exchange 500Kbytes for file transfer 500Kbytes for file transfer –January, 2007 500Kbytes (both for message exchange and file transfer) 500Kbytes (both for message exchange and file transfer)

8. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20068 GTS system (3) Binary messages Binary messages –Received messages (T1= H, I, P) BUFR data: AMDAR, SYNOP, TEMP, Satellite data, …… BUFR data: AMDAR, SYNOP, TEMP, Satellite data, …… GRIB products: AMMC, ECMWF, EDZW, EGRR,KWBC,RJTD GRIB products: AMMC, ECMWF, EDZW, EGRR,KWBC,RJTD FAX charts: EGRR, RJTD, RUMS FAX charts: EGRR, RJTD, RUMS Received from Offenbach, Tokyo, Moscow, Melbourne, Seoul Received from Offenbach, Tokyo, Moscow, Melbourne, Seoul Relayed to Offenbach, Tokyo, Moscow, Seoul, Ulan Bator Relayed to Offenbach, Tokyo, Moscow, Seoul, Ulan Bator –Local data and products (T1= H, I) NWP products in GRIB codes NWP products in GRIB codes –Segmented for the transmission via TCP sockets –Not segmented for file transfer Satellite data in BUFR codes Satellite data in BUFR codes –Segmented for the transmission via TCP sockets and via FTP –Not segmented for file transfer Distributed to Offenbach, Tokyo, Moscow, Melbourne, Seoul, Ulan Bator Distributed to Offenbach, Tokyo, Moscow, Melbourne, Seoul, Ulan Bator

9. ISS/ICM-MTN & ET-OI, Geneva, 16-19 May 20069 Satellite-based services CMA ’ s PCVSAT broadcasting system CMA ’ s PCVSAT broadcasting system Pyongyang, Ulan Bator, Hanoi, Yangon Pyongyang, Ulan Bator, Hanoi, Yangon Available data for the neighboring centers Available data for the neighboring centers –GTS data (A/N bulletins, binary messages, fax charts) –CMA ’ s NWP products (in GRIB codes) –CMA ’ s FY satellite data (BUFR products, images)