Benefits of VoIP Peering in a Challenging Economy (SP-10) Tuesday - 02/03/09 4:00-4:45pm Mark Benisz, VP Americas, XConnect Global Networks

Agenda VoIP Peering in a challenging Economy Best practices for NGN interconnects: bilateral, multilateral and federated Registry vs. Signaling approaches to peering Number portability and ENUM Regional and Global Peering trends How peering enables new high margin services: video, high quality audio Commercial benefits and case studies

IP Communications & NGN Adoption Voice over Broadband Adoption – Residential Lines

Intermediate Result: VoIP/NGN Islands VoIP /NGN Service Providers Global Enterprises Cable VoIP Services 3G Mobile / IMS Web based VoIP services PSTN

Today’s Telephony Challenge How to get all the disparate pieces of the global network puzzle working together?

Peering brings all the parts together Enable groups of service providers to multi-laterally exchange calls with each other via IP, based on a set of administrative terms for settlement, policy and interconnection

Best Practices for NGN Interconnects Bilateral – Resource intensive – Not scalable Multilateral – One interconnect – Possibility of one commercial contract – Minimal use of internal resources Network upgrades Federated – Members control policy Trust Commercials

Registry vs. Signaling Functions Registry identifies service provider or entity – identify actual egress point – Optimize routing Enables most efficient routing mechanism – voice – video – push-to-talk – SMS – new IP features Signaling Enables scalable interconnection Signaling Hub – Enables signaling management – multi-protocol,

Challenges Standard IP Peering / Connectivity - Public, Private, Ethernet Physical Transport Which calls terminate to another VSP, and where should they be routed? Discovery / Location (ENUM Registry) How can signalling interoperability be ensured with different protocols, variants & implementations? Signalling Interoperability Who should calls be received from & on what basis? How to protect subscribers from abuse (SPIT, vishing)? Policy, Trust & Security NAT traversal and codec incompatibility Media Handling Based on policy and traffic profiles, should calls be settlement- based or settlement- free (Bill & Keep)? Commercial

LNP and ENUM Number portability (local, mobile or full) is now available in US, Canada, Mexico and Brazil – All Call Query (ACQ) – Central Registry Approach – Call Forwarding Approach – Typically delivered via SS7/ C7 ENUM Registries – Private routing, public registry, carrier ENUM via ACQ – Can be LNP corrected – Enables expansion of ACQ to other Registry information beyond NP Features supported (video, wideband codecs, Presence) Call forwarding, call forking, non-traditional number plans

Regional and Global Peering trends Regional Netherlands - JCC MSO peering Brazil - VoIP peering federation UK - BT IP Exchange USA - Cablelabs Global GSMA i3 Forum Peering Service Providers

New High Margin Services High fidelity audio Video telephony IM integration Vanity Numbers/ DIDs Not just low cost voice

Peering to IM Service Providers Differentiate service from PSTN Peer VoIP Networks with voice-enabled IM communities. Call IM communities – by dialing a numeric phone – IM user can call back whenever they want. – Discover/Provision IM buddy numbers using a web page. Number assigned to the IM client can be: – private number – conventional e.164 number

Mark Benisz, VP Americas