1. July 20, 2007 DBC confidential. Duplication strictly prohibited. 1 DigitalBridge Communications Next-generation broadband for South Carolina October 17, 2007

2. July 20, 2007 DBC confidential. Duplication strictly prohibited. 2 Launched WiMAX in small towns during 2007, attaining 7% penetration in 4 months Acquired 20,000 existing subscribers and 150 million MHz-PoPs of WiMAX spectrum, with 135 million MHz-PoPs pending Projected 2007 base case revenue of $11M growing to $104M in 2011 Employed capital-efficient, pay-as-you-grow strategy: ‐ WiMAX is fundamentally different from other technologies ‐ DBC is able to deploy economically to smaller, under-served towns DBC summary

3. July 20, 2007 DBC confidential. Duplication strictly prohibited. 3 Capital cost per home passed is $50-$75 vs. $800-$1,200 WiMAX network is built only where sufficient density exists base station-by-base station Service differentiates on simplicity of install/activation and portability All-IP network permits profitable additions to ARPU Simplicity and end-to-end control of activation enables targeting of large customer bases among universities, visitors (roaming and non-roaming), and military communities WiMAX networks will do for the Internet what cellular networks did for voice communications Why WiMAX will succeed in underserved markets

4. July 20, 2007 DBC confidential. Duplication strictly prohibited. 4 WiMAX puts DBC on the path toward personal broadband In-home self-install CPE PC card Embedded WiMAX chips Mobile devices Today Q1 2008 Q4 2008 2009

5. July 20, 2007 DBC confidential. Duplication strictly prohibited. 5 DBC differentiates itself at three points in the broadband service delivery chain Middle Mile Low-cost, high-capacity backhaul Excess fiber capacity Municipally-supported transport networks Utility-owned fiber networks Educational networks Aggregated content First Mile Flexible, low-cost back office Outsource/integrate: ‐ Arise (customer care) ‐ Aria (billing) ‐ Alvarion (network management) Outsource overhead Scalable – invest as you grow Last Mile New WiMAX technology to reach end customer Underserved/exclusive markets Self-provisioned, fast install Portable  personal broadband No one between DBC and its customers Small Business Visitor-based network Schools MDUs Military Housing Single Family Homes Fiber or Wireless Internet Backhaul NOC

6. July 20, 2007 DBC confidential. Duplication strictly prohibited. 6 DBC has built a low-cost, scalable, carrier-grade back office

7. July 20, 2007 DBC confidential. Duplication strictly prohibited. 7 DBC’s primary markets are smaller, under-served towns Target markets include 1,300 towns (population 20,000-150,000) with 27 million people Key “reference” markets will be deployed this fall: Homes College students/staff Visitors Military families Consumer Small business Carriers/wholesale Business Muni WiMAX First responder (Missoula) Disaster recovery ‐ Redundant links ‐ Work-from-home Government/ Homeland Security

8. July 20, 2007 DBC confidential. Duplication strictly prohibited. 8 Rapid deployment to under-served parts of South Carolina Affordable pricing of broadband voice and data services Fair-market lease rates for spectrum Commitment to bring broadband to college communities (on- and off-campus) Commitment to support educational and strategic goals of local colleges DBC welcomes the opportunity to partner with South Carolina to deploy next-generation broadband

9. July 20, 2007 DBC confidential. Duplication strictly prohibited. 9 Middle Mile Capacity additions on a variable basis First Mile Capital-efficient, pay-as-you-grow Flexible, non-legacy systems Last Mile Targeted underserved markets Opportunistic mix of owned, leased, and “called” spectrum Differentiated, easy, portable service Small Business Visitor-based network Schools MDUs Military Housing Single Family Homes Fiber or Wireless Internet Backhaul NOC DBC is well positioned to help bring next-generation broadband services to South Carolina