1. Presented by: Edgar Mendez System Engineer Specialist Airmux-400 Version 2.1 GA

2. Slide 2 Airmux-400 in Brief Airmux-400 is a point-to-point radio solution for combined Ethernet and TDM* traffic over license-free frequencies * TDM and collocation supported in version 2.2: Q2 2009

3. Slide 3 Target Markets The Airmux-400 series targets the global markets of Cellular Backhaul, WiMAX and ISP Backhaul, Broadband Access and Private and Government Networks All these markets require higher bandwidth (TDM & Eth) coupled with longer range and robustness - while keeping the best price / performance

4. Slide 4 Central Site Small Town Cellular Backhaul Applications Village NLOS Backhauling Rural Area Deployment Village Urban Area Deployment Remote Site Access Service Remote Site Temporary Backhaul Remote Site Backup to Wired Backhaul Backhaul to Low ARPU Areas Intermediate Backhaul * TDM (T1 and E1) and collocation supported in version 2.2

5. Slide 5 Cellular Backhaul Applications Alternative to Leased Lines Complementing existing networks in Rural Areas Remote communities & locations Low ARPU communities Hard to reach locations and NLOS scenarios Overlay to network coverage in Urban Areas Enhance coverage and capacity Providing service to “low-ARPU” locations in the city Hard to reach locations – Problematic trenching or N-LOS scenarios NLOS scenarios Addressing peak hours requirements and temporary events 3G ramp-up (More base stations; More capacity per site; Street-level locations) Intermediate Backhaul Backup

6. Slide 6 Airmux-400 Remote Site Airmux-400 Remote Site Airmux-400 Remote Site Airmux-400 Remote Site Airmux-400 Access Unit Central Site Broadband Access Expand broadband data and voice to rural and underserved markets Eliminate costly rollout investments and speed time to market Telco grade – Long range; high capacity (x 10 more than leased line) Airmux-400 Remote Site * TDM and collocation supported in version 2.2

7. Slide 7 Airmux-400 – Benefits High bandwidth with longer range – 50Mbps full duplex net throughput reaching up to 75 miles / 120 km Ethernet and TDM* services on one platform Competitive prices – higher Ethernet capacity for lower prices Applicable to nLOS, over-water deployments and high capacity over extended range with improved robustness thanks to the OFDM, MIMO and antenna polarization features. Flexible product usage (& stock reduction) of the single configurable ODU. Fast and easy deployments via installation and alignment tools * TDM supported in version 2.2

8. Slide 8 Performance

9. Slide 9 Spatial Multiplexing MIMO MIMO = Multiple Input Multiple Output A high rate signal is split into multiple lower rate streams and each stream is transmitted from a different transmit antenna in the same frequency channel. Streams merged into one signal TX Lower rate streams High rate signal RX

10. Slide 10 Benefits of MIMO-OFDM MIMO achieves significant increases in capacity, range and reliability without additional bandwidth or transmit power Increased range and reliability: The Ethernet data stream is split into two lower rate chains These chains can be transmitted in lower rates, achieving longer ranges and higher reliability Increased capacity and improved spectral efficiency Each radio (chain) carries the full OFDM channel capacity Both radios use the same 20MHz channel Thus doubled capacity per the same channel bandwidth Improved availability The streams arrive at the receivers in different quality. MIMO chooses the best stream available Paths in poor quality are thus eliminated and availability increased

11. Slide 11 Product Elements ODU Integrated dual polarization antenna Connectors: 2 x N type for external antennas, 1 IDU-ODU IDUE Ethernet support 19” 1U PoE device supported Management Common NMS for Airmux-200 and Airmux-400

12. Slide 12 Roadmap ProductPhaseNew FeaturesReady for GA Airmux-4002.1 Service – Ethernet only (50Mbps) Radio 5.8GHz band for FCC/IC 2/2009 Airmux-4002.2 Service – Ethernet + TDM (16 E1/T1 ports) Collocation support Radio 2.4, 4.9, 5.3, 5.4 GHz FCC/IC band 2.4, 5.3, 5., 5.8GHz ETSI band 2.3-2.5GHz Universal Q2/2009 Note: Single configurable ODU HW for 2.3 – 2.5 GHz, 4.9GHz - 5.9GHz for FCC and Universal markets by phase 2.2

13. New Wireless Solutions & TDMoIP for PM2008 Slide 13 www.rad.com Thank you for your attention