1. Asia/Pacific ATN Regional Backbone Inter-Regional Trunk Connection New Inter-Regional Trunk Connection Intra-Regional Trunk Connection New Intra-Regional Trunk Connection NAM Region EUR Region MID Region AFI Region APAC Region AU CN JP IN TH SG HK US is North America Backbone FJ Japan China Hong Kong, China ThailandFiji India Singapore Australia North America Europe Middle East Africa

2. Asia/Pacific Regional ATN

3. 3 23-24 November 2009 Federal Aviation Administration Our Vision: Service and Safety Inter-Regional Trunk Connection Intra-Regional Trunk Connection EUR Region ASIA Region AFI Region CAR/SAM Region VE US JM PE HN AT TT BB CC AR HT BR AR: Argentina AT: Antigua BB:Barbados BR: Brazil CC: Chile HN: Honduras HT: Haiti JM: Jamaica PE: Peru TT: Trinidad and Tobago US: United State of America VE: Venezuela CAR/SAM Regional ATN Backbone Architecture

4. 4 23-24 November 2009 Federal Aviation Administration Our Vision: Service and Safety Protocol Stacks for Current AMHS Applications AMHS (Message Transfer Agent) Application Layer AMHS (Message Transfer Agent) Application Layer Presentation Layer Session Layer TP4TP4 TP0TP0 RFC 1006 TCPTCP CLNPCLNPIPv4IPv4

5. 5 23-24 November 2009 Federal Aviation Administration Our Vision: Servicand Safety 5 Transitional Plan - IP IPv4 Intra-Regional and IPv6 to External ICAO Regions

6. 6 23-24 November 2009 Federal Aviation Administration End State IPv6 for Intra-Region and Inter-Region