1. 1 Session Controllers Micaela Giuhat AVP Product Management Netrake micaela@netrake.com

2. 2 Outline VoIP: –Market drivers –Phased approach to VoIP VoIP Problems VoIP Solutions –Introduction of IP Session Controllers Network Deployments Conclusions

3. 3 Enterprise VoIP Displacing Circuit PBX Global 5000 demand increasing for multimedia –Economics of converged networks leads carrier capabilities –Combine IPVPN with IPBX with application-aware overlays VoIP seen as source of new applications/features/capacity –IM with Media replaces dialtone (e.g. Microsoft, Reuters) –VoIP-over-VPN increases cost efficiencies of IP VPNs Seamless continuity between networks (e.g. Fidelity) –Single Source for Local and Long Distance –Single Access for Voice and Data –Inter-Carrier connectivity for Global reach –Inter-Enterprise Voice and Data Routing by Carrier Network Outsourced solutions required to reduce cost –Managed Services - both network and premise-based Performance solutions for IP networks –Security and Failover Reliability for Media

4. 4 Carrier VoIP Momentum is Growing Rule 271 is allowing RBOCs into Long Distance –Intra-region is facilities-based VoIP - collapses regulatory domains –Inter-region is Wholesale VoIP origination and termination Regulatory conditions force IXCs to seek broadband access –Demand for converged access facilities is growing –Sprint Local Access Packetization, ATT RFI, MCI RFI, BT Hosted GW Service National Local Voice Offering demand is growing –‘National CLEC’ is emerging (e.g. Level(3), Wiltel, GX) –75% of Market Analyst respondents planning to wholesale VoIP –Several RFPs (e.g. Fidelity) looking for single source Market is moving towards flat rate services for subscribers –SBC All Distance, MCI Network Neighborhood, Verizon, etc. –Bundled services increase broadband take rates, compete against cable ‘triple play’ Carriers are transforming backbones to VoIP to compete

5. 5 Phased Approach to VoIP Phase I  –IP PBXs Phase II  –Consumer VoIP Phase III  –VoIP end to end peering

6. 6 IP PBXs and Intra Enterprise VoIP IP PBXs are displacing network-based services or old PBX systems –By 2005, 60% of new systems will be IP PBX (Yankee Group) –IP PBX targeted against Centrex customers (Top 20%) IP Network Router/ Gateway Legacy Phones Local/Toll PSTN IP PBX PRI T1 (data and voice) Router/ Gateway IP PBX PRI VoIP Islands Enterprise Branch AEnterprise Branch B T1 (data and voice)

7. 7 Consumer VoIP Microsoft shipping VoIP (SIP) to 150M users in next 3 years CASPs take revenue without contribution (Vonage, etc) No need for VoIP gateway, let the carrier perform the gateway function IP Network SIP Server Legacy Phones Local/Toll PSTN Media Gateway High Speed Internet Connection VoIP Islands SIP Phones SIP Phones High Speed Internet Connection

8. 8 VoIP Interconnection No more island topologies: –High efficiency –Cost effective for both carrier and enterprise Set the stage for deploying mass market IP applications MG Local/Toll PSTN IP Network SIP Services Legacy Phones Native VoIP Peering SIP Phones Router/ Gateway SIP Phones SIP Phones

9. 9 Session Controller Solving the Technical Barriers for VoIP VoIP Security VoIP Demarcation VoIP Scalability/Service Availability Enterprise Network Local VoIP Network Carrier Service Center Other Carrier or Carrier Long Distance VoIP Network Carrier Interconnection Point Session Controller Session Controller Enterprise Aggregation Deployment Point Session Controller Session Controller Security Deployment Point Session Controller Session Controller

10. 10 Session Controller Definition The Session Controller is a new network element that provides carrier grade, secure, protocol aware session based network translation, firewall traversal, and QoS/SDR functionality for real time, multimedia communications. VoIP Session = 2 SIP Flows, 2 RTP Flows, 2 RTCP Flows = Firewall SIP Proxy QoS/SDRNAT device Session Controller

11. 11 IP Phones FW Enterprise Router Edge Router IP Phones FW Enterprise Router NTS Client Edge Router LAN Enterprise w/VoIP DSL Modem VoIP Cordless Phone Multi-line, Built-in Router Small Biz w/VoIP over DSL Edge Router Core Router Small/Medium Biz w/VoIP/T1 facilities Core Routed Network NAT and FW Traversal Multilevel Security Header Stripping QoS Mappings SDRs and SLAs Real time call handling Core Router Carrier to Enterprise IP Demarcation

12. 12 Carrier to Carrier IP Demarcation Native VoIP interconnect provides dramatic savings for both enterprise and carriers No more island topologies Ensure network security in critical points Core Routed Network Softswitches Core SIP Servers VoIP Network VoIP Network VoIP Network VoIP Network Edge Router Core Router Edge Router Edge Router Edge Router Core Router NAT and FW Traversal Multilevel Security Carrier Reconciliation Records QoS Mgmt and Mapping Topology Hiding Real time call handling NAT and FW Traversal Multilevel Security Carrier Reconciliation Records QoS Mgmt and Mapping Topology Hiding Real time call handling

13. 13 Carrier Service Center Security Application Hosted IP PBX National Voicemail 8XX & Local Advanced Call Control Audio Conferencing Media Servers Application Servers Softswitches Core SIP Servers MG Carrier Service Center Other Carrier VoIP Network Other Carrier TDM Network ATM Network TDM Network MG Edge Router Core Router Core Router Edge Router Core Router Core Routed Network Edge Router Multilevel Security: Access Control Lists Early and Late Rogue RTP Detection DoS Attacks prevention CALEA SDR SLAs Session Level Management Real time call handling

14. 14 Conclusions Incumbent carriers need to recapture revenue: –Provide managed native VoIP peering (trunks) –Provide managed native VoIP access (bearer) –Decreases customer costs (CPE and PRI) Secure VoIP Network –Provide VoIP service center protection –Provide VoIP CALEA for lawful intercept Establish End to End VoIP Communications –New Opportunities for wholesale services –New Markets with Hosted Communications Platform