1. Airmux 400

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 supported in version 2.2

3. Slide 3 Target Markets The Airmux-400 series is targeting 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) with longer range, 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 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 120km Combined Native TDM* & Native Ethernet services on one platform Competitive prices – higher Ethernet & TDM* 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 alignments tools * TDM supported in version 2.2

8. Slide 8 Ethernet Performance

9. Slide 9 TDM Performance Typical performance assuming availability of 99.99%

10. Slide 10 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

11. Slide 11 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

12. Slide 12 Product Elements ODU Integrated dual polarization antenna Connectors: 2 x N type for external antennas, 1 IDU-ODU, 1 multi p-t-p synch IDUE Ethernet support 19” 1U PoE device supported Management Common NMS for Airmux-200 and Airmux-400

13. Slide 13 Competition Motorola Canopy 600 (previously Orthogon) 150 Mbps full duplex Bands: 2.5, 5.4, 5.8GHz using MIMO Approx. price per link (list): > $20,000 Redline AN80 45 Mbps full duplex Bands: 5.4 and 5.8GHz No MIMO Approx. price per link (list): $15,000 Exalt EX-I 55 Mbps full duplex Bands: 2.4, 4.9GHz, 5.x No MIMO Approx. price per link (list):$8,000

14. Slide 14 Roadmap ProductPhaseNew FeaturesReady for GA Airmux-4002.1 Service – Ethernet only (50Mbps) Radio – Multi Bands and regulations 5.8GHz band for FCC/IC, India (WPC) 1/09 Airmux-4002.2 Service – Ethernet + TDM (16 E1/T1 ports) Radio – Multi Bands and regulations 2.4, 4.9, 5.3, 5.4 GHz FCC/IC band 2.4, 5.3, 5.4, 5.8GHz ETSI band 2.3-2.5GHz Universal Integrated SW upgrade tool Q2 ’09 Note: Single configurable ODU HW for 2.3 – 2.5 GHz, 4.9GHz - 5.9GHz for FCC and Universal markets by phase 2.2

15. Slide 15 Roadmap – Future Plan ProductPhaseNew Features Airmux-4002.3 HSS – Co Location Support Support Hot Stand-by 1+1 Spectrum Viewer Airmux-4002.4 Support asymmetric 100Mbps @ 20MHz channel BW (fixed configuration– Ethernet + TDM (16 E1/T1 ports) Ready for GA Q3/09 Q4/09

16. Airmux 400 Ver 2.2

17. Slide 17 Airmux-400 Products Catalog - IDUs Description Indoor unit with 16 TDM and 2 Ethernet interfaces, dual DC feed (-20 to -60 VDC), 19” 1U Indoor unit with 8 TDM and 2 Ethernet interfaces, dual DC feed (-20 to -60 VDC), 19” 1U Indoor unit with 4 TDM and 2 Ethernet interfaces, dual DC feed (-20 to -60 VDC), 19” 1U Indoor unit with 2 Ethernet interfaces, dual DC feed (-20 to -60 VDC), 19” 1U Note: All IDUs supporting both Airmux-200 and Airmux-400. For Airmux-200 the 8 and 16 E1/T1 will support up to 4E1/T1

18. Slide 18 Airmux-400 Products Catalog – ODUs (1) 4.9GHz FCC 5.8GHz India5.8GHz FCC/ICRegulation Integrated ConnectorizedIntegratedConnectorizedIntegratedConnectorizedInt/Ext Antenna Band V VVVVV5.9 GHz Universal Factory default Factory defaultVVVV5.8 GHz FCC/IC V VVVVV5.8 GHz MII China V V Factory default Factory defaultVV5.8 GHz WPC India V VVVVV5.4 GHz FCC V VVVVV5.4 GHz IC V VVVVV5.4 GHz Universal V VVVVV5.3 GHz FCC/IC V VVVVV5.3 GHz Universal Requires key Factory default Factory default4.9 GHz FCC V-V-V-2.4 GHz FCC/IC V-V-V-2.3-2.4 GHz Universal

19. Slide 19 Airmux-400 Products Catalog – ODUs (2) 2.4GHz FCC/IC5.4GHz ETSI Regulation Integrated ConnectorizedInt/Ext Antenna Band - Factory default-2.4 GHz FCC/IC -V-2.3-2.4 GHz Universal V-V5.8 GHz ETSI Factory default- Factory default5.4 GHz ETSI V-V5.3 GHz ETSI --V2.4 GHz ETSI

20. Slide 20 Airmux-400 Products Catalog - Antennas Integrated Antennas Multi-band 5.x and 4.9 GHz, 1.ft Flat Panel Dual Polarization Multi-band 2.3-2.4 GHz, 1.ft Flat Panel Dual Polarization External Antennas Multi-band 2.4 – 2.7 GHz 1.2ft Flat Panel Dual Polarization Multi-band 5.250 - 5.875 GHz 2ft Dish Dual Polarization Note: The above dual polarization antennas supports both Airmux-200 and Airmux-400.

21. Airmux 400 Ver 2.2 extra slides

22. Slide 22 Product Spec – IDU (1) TDM Interface Number of Ports 16, 8, 4 or 0 Type E1/T1 configurable Framing Unframed (transparent) Timing Independent timing per port, Tx and Rx Connector RJ-45 Standards Compliance ITU-T G.703, G.826 Line Code E1: HDB3 @ 2.048 Mbps, T1: B8ZS/AMI @ 1.544 Mbps Latency Configurable 5-20 msec Impedance E1: 120Ω, balanced T1: 100Ω, balanced Jitter & Wander According to ITU-T G.823, G.824

23. Slide 23 Product Spec – IDU (2) Ethernet Interface Ethernet ports 2 in IDU; 1 in PoE device 10/100BaseT with Auto-Negotiation (IEEE 802.3u) Framing/Coding IEEE 802.3 Line Impedance 100 Ω Connector RJ-45 SFP portSupported via external device VLAN SupportTransparent Maximum Frame Size2048 Bytes Latency3 msec (typical)

24. Slide 24 Product Spec - ODU Duplex TechniqueTDD ModulationOFDM – BPSK/QPSK/16QAM/64QAM, MIMO 2x2 Max Data Rate Two chains: 130 Mbps at 20 MHz channel (50 Mbps throughput) Single chain: 65 Mbps at 20 MHz channel (25 Mbps throughput) Max Tx Power25 dBm Error CorrectionFEC k=1/2, 2/3, 3/4, 5/6 EncryptionAES 128 Dimensions Connectorized: 19.5(w) x 27.0(h) x 8.0(d) cm Integrated: 37.1(w) x 37.1(h) x 11.0(d) cm Weight Connectorized: 1.8 kg / 3.6 lbs Integrated: 3.5 kg / 7 lbs Power Consumption<35W (ODU+IDU) Operating Temperature Standard: -35°C to +60°C / -31°F to +140°F HumidityUp to 100% non-condensing, IP67

25. Slide 25 Product Spec – Antennas Integrated Antennas Multi-band 5.x and 4.9 GHz Flat panel 37x37cm 23dBi at 5.x GHz 19dBi at 4.9 GHz 8° beam width Multi-band 2.3-2.4 GHz Flat panel 37x37cm 16dBi 16° beam width External Antennas 2ft Dish Dual Polarization Frequency5.250 - 5.875 GHz Gain28 dBi Diameter 2 ft / 620 mm Beam Width H,V: 5 o 1ft Flat Panel Dual Polarization Frequency2.4 – 2.7 GHz Gain19 dBi Dimensions37 x 37 cm Beam Width16°

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