1. 1 VoIP Peering Peering, it’s not just for IP anymore Kingsley Hill XConnect Global Networks, Ltd VP for Strategic Federations

2. 2 XConnectXConnect – Brief Background XConnect Launched in Feb 2005 Peering VSPs since 2002 (through acquisition) Offices & PoPs in Europe & USA Neutral, Global federated VoIP Peering Service Key Metrics 400+ VSPs, 45 Countries, > 10 M end-users Awarded 1st National VoIP Peering Deal (Netherlands MSOs) Services Patent-Pending, “Plug & Peer” Technology Federated Private ENUM Directory Multi-Protocol Interoperability, VoIP Security including / SPIT Bi-Lateral Exchange Multi-Lateral Settlement-Free XConnect Alliance Strategic Partner : Kayote Networks Inc

3. 3 VoIP Peering* vs. IP Peering VoIP Signaling, Security, Authentication, Identity IP QoS (Latency, Jitter) QoS Settlement & Settlement- Free Relationships Symmetric Peering / Transit Asymmetric Commercial SIP, H323, ENUM, TLS, EPP, etc IP, BGP, MPLS IETF Protocols Communications session aware (Layers 5-7) “IP Packet” aware only (Layers 1-3) Awareness VoIP PeeringIP Peering * See IETF Speermint WG : Session PEERing for Multimedia INTerconnect

4. 4 It’s not so easy Provisioning Data Publishing (AXFR, EPP, SOAP & Security) Data Poisoning, Mis-Routings & Policies Address Resolution TN  URI, URI  SRV or Originating Based, Split View – SPID, or ANI ? Multiple Resolutions / Queries LNP, Infrastructure, Federation(s!) Privacy / Security / Identity Identity of Server – DNS-SEC Identity of Client – ACL, VPN or New Standard Data Propagation & Replication Remote Query or Local Copy Zone Transfers / Security Implications Synchronization (1-many, Realtime) Challenge

5. 5 VSP* Interconnect : The 4 Layers To Connect VSP1 to VSP2 Discovery and Routing - Who and how ? Global ENUM Based Directory Services Signalling & Session Management Multi Protocol (PacketCable, SIP, H323); Signalling Interoperability Do I know you and trust you ? Security, Privacy, Identity SPIT Protection, CallerID Authentication, Peering Policy How much do I pay you ? Settlement and New Paradigm; Settlement Free * VSP = VoIP Service Provider

6. 6 VoIP Interconnect Requirements Directory Routing Signalling Interoperability Security, Identity & Trust Commercial & Contractual Transport Layers 2/3 Bi-Lateral VoIP Interconnect is NOT SCALABLE

7. 7 Federation Interconnection

8. 8 …and that is where Federation comes in Neutral party Negotiates bi-lateral agreement with each participant, including all the parts: directory, signalling, security, commercials and transport Absorbs the differences between VSPs XConnect Global Federation is an example of a successful federation. 400 VSPs around the world sharing traffic without transiting the old network— not paying their arch-enemy to carry their traffic

9. 9 What does the Federation do? Provide secure route discovery (e.g. Federation ENUM) Absorb technical differences Facilitate settlement (if any) Eliminate the N 2 problem Implement and enforce policies

10. 10 Why is it different? VoIP standards are not SO standard VoIP industry has many more participants VoIP has low barriers to entry VoIP is characteristic of dynamic and innovative technology VoIP has more security concerns

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12. 12 Netherlands Cable Industry >97% Cable Subscribers Offering full Triple Play Q2 2006, 12% Digital Telephony 2 nd Highest in World, c. 1.2M Customers Issued RFI (Oct 05) for VoIP Federation Peering service Market Drivers for Peering ByPass Per-Minute Charges $PSTN$ (KPN) Deliver Cross-Network Rich Multi-Media IP Communication Services (Video, Wideband, Secure) XConnect MSO Solution Awarded contract in January 2006 In concert with AM-SIX Netherlands MSO VoIP Federation

13. 13 Brazil / XConnect Federation Brazilian VSPs agreed to form a federation Joint effort of VSPs, Terremark, and XConnect Brazil is fastest growing VoIP market Designed specifically for the VoIP market in Brazil and governed by the participants

14. 14 Thank you Kingsley Hill VP Strategic Federations, XConnect khill@xconnect.net Office: +1 908 382 6468 Fax: +1 908 781 6047 UK: +44 2070 993 682