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Items for Requirement Definition1. VoIP: SIP2. Enhanced communications

1. Video: SIP, H.323 if easily possible2. IM, chat: SIMPLE, XMPP3. Presence, location: SIMPLE, XMPP4. Web based conferencing/collaboration tools

3. Reachability (finding an endpoint)4. Routing5. Identity/authentication6. Financial7. Roaming8. Security (encryption, DoS etc)

• Requirements for carriers• Requirements for vendors

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5 levels of activity of an NRN regarding VoIP

1. Network Service provider (bits, lightpath) between carrier and institution

2. Transport Service provider (IP packets, VPN) between carrier and institution

3. Session Service provider (SIP)4. Application Service provider (end-user

service)5. Advisory role

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Routing options (FCCN)

1. VoIP inside NRN1. Private numbering plan2. Public numbering plan

2. PSTN gateways1. Central service by NRN2. Distributed by institutions

1. Local2. ‘roaming’

3. Interconnect to NRN’s (peering, FW, SBC, proxy)4. Internet SIP domains

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Quick overview of VoIP status at NRN’s:

I CH N PT CZ NL GRNetSP YTransSP II, CI ‘07 ‘07 ‘07 ‘07 II, CI IISessSP ‘07 II, CI IIAppSP ‘07 Y(3) Y(3) YAdvice Y Y Y Y Y Y YNrplan pub pub pub pub pub pub pubGWs L ’07 L L ‘07 L,C L

(1) Inter-institution or Carrier-Institution(2) Only for non-PSTN(3) Test bed(4) Central, Local (at institution)

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