2. Redundant- Every POP has at least 2 paths to the backbone Self-healing Same design in Greater Providence/Newport Wireless Ring

3. Greater Boston Coverage Over 90 % penetration rate

4. Greater Providence Coverage Over 90 % penetration rate

5. Company Profile T1 (1.5 Mbps)- T3 (10 – 45 Mbps) market. Hundreds of business customers. About 20 employees. Use mostly 5 GHz spectrum. Founded in October 2000 & self-funded. Major deployment of 2 nd Generation Fixed- Wireless P2MP (Aperto Networks) and P2P (Western Multiplex).

6. Customer base 4 TV stations 3 Universities 4 law firms 2 hospitals, 12 biotech companies 6 banks 12 engineer/consultant 7 Financial Services 3 Non-profits 3 construction cos. 3 city/towns And a major donut conglomerate

7. Customer base From MIT Lincoln Labs concerned with separate egress for disaster recovery … To abandoned urban businesses that are too far from a D-SLAM or outside of Cable Or who simply want good service at a great price

8. More Broadband, Lower Costs TowerStream offers customers lower costs and greater reliability than traditional wire line networks TowerStream offers better reliability and security TowerStream can deliver service quickly No phone company. Total bypass.

9. Fixed-Wireless Has Arrived Second-generation point-to-multipoint fixed wireless broadband network As reliable as a wired T1 Weather does not affect performance Security equal to or greater than a wired T1

10. Maximum Broadband Services –T-1:.5 - 10 megabits per second (Mbps) –T-3: 10 Mbps up to 45 Mbps per second –Custom: Up to Gigabit speeds

11. Our SLA TowerStream is among the first companies to offer a Service Level Agreement on the last mile Our SLA: –99.99% network availability –Latency guarantee < 75ms round trip delay on TowerStream Network –Latency guarantee < 50ms round trip delay on last mile –Packet loss guarantee < 1% on backbone Our wireless ring network assures redundancy

12. Disaster Recovery True Separate Egress No wires to cut- Back-hoe proof! –Wire line redundancy solutions are susceptible to having both lines cut by road crews, careless electricians, etc. –TowerStream supports BGP (Border Gateway Protocol) for seamless, real-time back-up

13. Flexible Bandwidth on Demand TowerStream technology is flexible enough to allow for immediate increases of bandwidth depending on your needs – From.5 to 10 Mbps From 10 to 45 Mbps In increments as big or small as you need.

14. TowerStream Security 56-bit hardware assisted data encryption standard (DES) and Media Access Control (MAC) authentication. This means Data is encrypted before sending on each side then decrypted when received. There are also some other challenges that make a FIXED wireless link harder to break than a wire connection. Relative physical proximity to the CPE (roof access). Extensive RF hardware and software (very expensive). Extensive RF knowledge Cracking both DES and the state-of-the-art spreading and modulation schemes such as QPSK and 16QAM which are also additional native encryption.

15. Up and Running TowerStream installation takes between 10 days and 2 weeks Traditional T-1 installation can take up to 2 months

16. Things that are working well Spectrum is truly weatherproof. New generation equipment works well. Saving spectrum by making our network. available to other providers as resellers and wholesalers.

17. On the horizon… As spectrum use increases, we hope to get FCC direction regarding spectrum “etiquette.” Priority given to first-in providers. And protection from malicious 3 rd parties who intentionally interfere.