1. Copyright © 2008 Vanu, Inc. 1 Software Radio Infrastructure Solutions for Caribbean Carriers Vanu Bose July 16, 2008

2. Copyright © 2008 Vanu, Inc. 2 Vanu has Pioneered Software Radio Technology History –Evolved from groundbreaking software radio research at MIT –Company founded in 1998 by Dr. Vanu Bose –90 employees –Offices in Cambridge, MA, Bangalore, India & New Delhi, India Industry Awards –Top 25 Emerging Technology companies, SmartTechie, SiliconIndia, 2008 –Mass NetComm Product of the Year, 2008 –Chosen IEEE Spectrum Magazine’s 2006 “Wireless Winner”, 1/2007 –GSM Association Technology Award for Most Innovative Infrastructure, 2005 –SDR Forum Industry Achievement Award for 2005 –Ten Coolest Companies Award by Telecommunication Magazine, 2005 –World Economic Forum Technology Pioneer, 2004 –Wall Street Journal Technology Innovation Awards: Runner Up in the Wireless Category, 2004 –Mass High Tech All Star Award, Oct. 24, 2003

3. Copyright © 2008 Vanu, Inc. 3 Agenda Anywave Overview Multi-Standard Business Case Hosted Switching Service Reduced backhaul costs for remote and rural sites VoIP Core compatibility

4. Copyright © 2008 Vanu, Inc. 4 Anywave has Unique Benefits and Capabilities Run multiple standards simultaneously –Dual mode (GSM/CDMA) product is deployed and operational –Only infrastructure product to support multiple standards simultaneously Cost-effective solutions for remote or rural site deployments –Reduce OPEX for sites requiring satellite backhaul Standards upgrades are software downloads –Download new software, rather than forklift upgrade to new standards “…the first step in what may prove to be a radio technology revolution.” -Michael Powell, FCC Chairman commenting on first ever FCC certification for a software- defined radio granted to Vanu, Inc.

5. Copyright © 2008 Vanu, Inc. 5 Technology Overview - The Vanu Anywave Solution Vanu Anywave Radio Access Network (RAN) –Multiple cellular standards operating at the same time –Add new wireless standards through remote software-only downloads –Compatible with legacy circuit switched and IP-based core networks Base Transceiver Station (BTS) Base Station Controller (BSC/RNC) Packet Control Unit/Function (PCU/PCF) Mobile Switching Center (MSC) GPRS/Packet Data Service Node (GSN/PDSN) PSTN IP

6. Copyright © 2008 Vanu, Inc. 6 Anywave: Multi-Standards on a Single Network RF Head per frequency band Single BTS server can support multiple wireless standards in any frequency band Single BSC server can support multiple wireless standards in any frequency band Vanu’s open standards approach enables faster deployments while future-proofing the network for remote additions of new standards and additional capacity Waveforms are digitized into IP packets and sent via GigE to be processed for any technology

7. Copyright © 2008 Vanu, Inc. 7 Case Study: Mid-Tex Cellular The Challenge: Cost-effectively migrate existing analog subscribers to GSM while providing a migration path to CDMA & other future standards The Solution: Migrated TDMA subscribers to Vanu’s GSM voice & GPRS data Added CDMA a year later via remote software downloads Backhaul is ½ the cost of separate systems Background: 8,000 square miles of coverage w/100K POPs in rural Texas Mid-Tex wanted to economically upgrade their cellular system from analog to digital Long distances between cell sites makes site visits very costly Needed a technology that could accommodate multiple standards to increase their roaming revenues Key Business Driver: Multi-Standard to increase roaming revenue

8. Copyright © 2008 Vanu, Inc. 8 Multi-Standard Caribbean Roaming Revenue Opportunities Many GSM operators in the Caribbean are not capturing the CDMA roaming revenue opportunity… & vice versa New entrants can offer a combined GSM/CDMA service, using one standard as primary service for local subscribers & both for “roaming” tourists Additional standards (EV-DO, UMTS, etc) can be added to the existing Vanu platform Source: Signals Telecom Consulting (San Juan Puerto Rico -2005)

9. Copyright © 2008 Vanu, Inc. 9 GSM / CDMA Hosted Switch Service A hosted core network enables operation of multiple technologies without the large upfront CAPEX

10. Copyright © 2008 Vanu, Inc. 10 Vanu’s Satellite Backhaul Solution Traditional Approach Vanu Approach Opportunity Expand cellular service in rural areas Challenges Cost of Bandwidth – connectivity Satellite access : $US 2 - 5 K / month Voice delay introduced by satellite Traffic pattern Up to 80% of the calls, originate and terminate in same town GSM (legacy) If one mobile calls another mobile, it requires all voice and signaling traffic to be routed back to the MSC for the duration of the call– very costly Up to 70% of monthly satellite cost eliminated Improved voice quality without satellite latency

11. Copyright © 2008 Vanu, Inc. 11 Case Study: GCI Communication Background: Alaska’s largest telecommunications firm, providing local, long distance, wireless, cable TV & Internet services Deploying a Vanu GSM solution to bring wireless communications to over 200 remotely located villages across the state of Alaska– islands of coverage The Challenge: Need a cost-effective solution for remote sites where cellular coverage hasn’t previously existed Cost-effective migration path to new technologies The Solution: Deployed Vanu’s GSM Software Radio at each cell site with the ability to add CDMA & other future standards Capacity can be increased or moved to other sites remotely via software downloads IP satellite backhaul

12. Copyright © 2008 Vanu, Inc. 12 Vanu VoIP Core Solution For Current VoIP providers: Capitalize on existing network resources to provide new services without large capital expenses Leverage existing switch, billing system, and delivery platform to support both wireline and wireless subscribers For Greenfield Wireless Network Deployments: VoIP switching infrastructure is significantly lower cost than traditional circuit switching Flexibility to add wireline service quickly and seamlessly

13. Copyright © 2008 Vanu, Inc. 13 Network Architecture Vanu GSM/CDMA BTS Vanu GSM/CDMA BTS Vanu GSM/CDMA BSC/TRAU/PCU Mavenir mOne Convergence Platform VLR/HLR GW MGW VoIP Switch SGSN/GGSN/ PDSN AAA HLR SMSC MMSC WAP GW PSTN SS7 Internet

14. Copyright © 2008 Vanu, Inc. 14 Thank You One System – Multiple Standards – New Revenue Sources