1. © Copyright AARNet Pty Ltd Peering SIP Domains NO MAGIC ANSWERS HERE APAN Cairn 2004 Saturday 3 July 2004

2. © Copyright AARNet Pty Ltd What is a SIP Administrative Domain These would be example, the SIP networks provided by TAWREN and AARNet

3. © Copyright AARNet Pty Ltd How to call someone, How do they call you sip:stephen.kingham@aarnet.edu.au Not really usefull for traditional telephones sip:61262223575@aarnet.edu.au Getting better, SIP Proxy can add the domain, but how does it know what domain to use? –ENUM, a sad and sorry tale in the hands of governments! –TRIP, a possible glimmer of hope?

4. © Copyright AARNet Pty Ltd Internet2 sip.EDU initiative

5. © Copyright AARNet Pty Ltd TRIP Telephone Routing over IP BGP for telephone numbers.

6. © Copyright AARNet Pty Ltd Static entries in a hireachi of Proxy SIP Servers Route E.164 numbers starting with 61 to AARNet Proxy SIP Servers @aarnet.edu.au. AARNet SIP Server routes call to AARNet Members or Hop off gateways to the PSTN.