1. sentitO Networks Overview George Tam Sales Director Asia Pacific US (415) 845-7710 Asia 852-6750-7800 Rob Csontos Director of Systems Engineering (727) 939-8454

2. Agenda Company Overview Products Overview Applications sentitO Advantages

3. 3 About sentitO Networks Highlights –Founded: September 2000 –Locations: Rockville, MD, Acton, MA –Management: Extensive VoIP, telecom, and data experience –Employees: ~65 –Financing: $61M USD Focus –VoIP switching and service delivery for the network edge –Incumbent, progressive, and emerging facilities-based service providers Connecting service providers to the power of IP

4. Products

5. 5 SIP GigE The Open Network Xchange (ONX) Carrier-class SIP/PSTN intelligent services gateway Transport T1/E1 ISDN PRI/SS7 IMT IP/SIP iVg SIP Proxy + SS7 gateway Signaling Proxy7 SS7SIP Network management system PreVision SNMP, FTP SNMP, XML Applications ONX Alliance Since 2004, ONX has been the “glue” for seamless and synthesized rollout of ten carrier-class VoIP networks and services.

6. 6 Primary Advantages Custom hardware — hardware-optimized bearer path, wire-speed routing and 120 Gb IP backplane to ensure voice quality, system reliability Distributed SIP architecture — reduces time to revenue by standardizing interoperability and service delivery Rugged telco design — hot swappable modules, full redundancy and alarm interfaces, temperature hardened, NEBS certified Cost-effective scalability — 13,824 DS0s in a single 7’ rack with no performance degradation Non Blocking with CODECs — G.729ab, G.723.1, G.711 and T.38 Fax.

7. 7 Superior Architecture Delivers Superior Economics Chassis Power Supply Mgmt Card Switch Fabric +++ Packet Card + Line Card + Commons Packet Line IO Cards Centralized processing creates cost, scaling issues +$ = $$$ + Packet Line IO Cards = Chassis PSRDGU Other gateways sentitO Distributed processing creates low entry and linear scaling costs with consistent performance

8. 8 IVG Modules  DGU-384—16 T1 interfaces  DGU-384—12 E1 interfaces  192/144 T1/E1 per chassis  576/432 T1/E1 (13,824 DS0) per bay  All required DSPs on board T1/E1 VOICE DGU  PSR—2 port Gigabit Ethernet interfaces  Full wire speed routing engine  Deep packet inspection, DoS and rogue gateway protection ROUTING PSR

9. 9 Superior Floorspace Economics 1 Chassis 1 DGU-384 1 PSR 384 DS0s Power consumption: 150 Watts 1 Chassis 12 DGU-384s 2 PSRs 4608 DS0s Power consumption: 800 Watts 3 Chassis 36 DGU-384s 6 PSRs 13,824 DS0s Power consumption: 2400 Watts Scales from low density to high density cost- effectively Single 7’ Rack Power consumption below NEBS and ETSI specifications

10. 10 Proxy7 Next-Generation Signaling Gateway/Proxy for SIP Networks SIP proxy with registrar and location capabilities Patent-pending SIP termination of SS7 signaling SS7/C7 signaling gateway with broad SS7/C7 application support Fully fault-tolerant architecture 140 CPS Supports SIP applications with routing support and interconnection to SS7 networks and resources

11. 11 PreVision Network and Services Management Comprehensive integration with IVG, Proxy7, and third-party products Sophisticated, telco grade and scale solution for managing networks Integrated CDR management system Event-driven, as opposed to poll-based architecture High security—SNMPv3 based Web clients—no need for special software on local PCs Robust, application-based management of VoIP elements and networks

12. Applications

13. IP Network PSTN SS7 Subscribers Proxy7 iVg Transport / LD Origination / Termination VoBBPre-Paid Calling Card Call Center VoIP SMB Remote Gateways iVg Residential Small / Medium Business Level3 Call Center If H.323 is needed Use an SBC

14. 14 Conclusions sentitO brings long-term value to networks through –Advanced, all-IP design –Custom hardware –Supports Multiple Applications –Reduced operational costs –High scalability with no performance loss –SIP and XML-based interfaces don’t lock you into a proprietary architecture –A radically simplified, service-centric architecture

15. Thank You