1. Case Study of IMTN Network B with A ET-IMTN 2001 ( Geneva, June 20 to 23, 2001) By Hiroyuki Ichijo Office of International Communications,JMA

2. 1. Seeking a possible and practical implementation 1. Seeking a possible and practical implementation Network D Network B Network A RA VI RMDCN Network C Tokyo Melbourne Washington Bracknell Offenbach Beijing Buenos AiresBrasilia Toulouse Prague New Delhi Sofia Nairobi DakarAlgiers Jeddah Cairo Moscow RTH- MTN Gateway RTH Existing network MTN PVC through Network Inter-Regional PVC through Network Network-to-Network Interconnection (NNI)

3. Melbourne Australia FRAME RELAY SCHEMATIC ( INFONET by Telstra) Dorval, Canada Washington NWS USA Buenos Aires Argentina Brasilia Brazil Pretoria, South Africa Tokyo, Japan Bracknell UK 256K 128K 256K 128K 64K 32K 8K8K 8K8K 64K 16K 8K8K NESDIS

4. FR Port Japan Local Line Tokyo Melbourne Bracknell FR Port Australia FR Port U.S.A. KDDI Frame Relay Gateway FR Port U.K. NNIGateway DACOM Frame Relay NNIGateway HKT IMTN Network B with Network A and additional links INFONET Frame Relay Seoul Hong Kong NNIGateway CAT Frame Relay Bangkok Buenos Aires Washington NWS / NESDIS Brasilia Pretoria Dorval

5. KDDI Tokyo Washington Bracknell Melbourne Telestra BT MCI WorldCom NNI “Some Clouds” One Cloud Tokyo Washington Bracknell Melbourne One of major Service providers ”a Single Cloud” Which is practical, “a Single Cloud” or “Some Clouds” ? Even “a Single Cloud”, it is possible that a true seamless network would not be always available…. But IMTN project makes progress towards “a Single Cloud” unless the implementation target would be in distant future. At least, the target of Network B should be implementation in 2002.

6. Centre A Centre B Router (FRAD) Centre C Router (FRAD) Router (FRAD) Frame Relay Network (ATM backbone) (ATM backbone) Frame Relay service Centre A Centre B Router Centre C Router Carrier’s Closed IP Network IP-VPN service Centre A Centre B VPN /Router Centre C VPN /Router VPN /Router Internet VPN service Internet Cost Security Throughput guarantee What kinds of services are allowable for the IMTN ? Frame Relay and IP-VPN may be allowable.

7. Difficulties in collaborative arrangements How will we deal with existing frameworks; Should we consolidate them into IMTN or not? That is a question! Melbourn e BoM Bracknell UK met office Washington NOAA /NESDIS BT Frame Relay WorldCom DorvalCMC WorldCom Dedicated lines TokyoJMA Buenos Aires Meteo AR BrasiliaINMET PretoriaSAWB RA V RMTN IMTN