A presentation on IP Mobile Backhaul from Aviat Networks (previously Harris Stratex Networks). Wireless backhaul solutions enabling the 4G/LTE future.

1. Wireless backhaul solutions Enabling the 4G/lte future ip Mobile backhaul solution

2. Global Broadband Data Explosion Mobile subscriber growth 1B to 3.5B subscribers in 3.5 Years More Mobile lines than fixed in the developing world Demand for Smart phones Data traffic volume from mobile devices growing by more than 10X per year Broadband video will drive 80% of mobile traffic JANUARY 28, 2010 2 AVIAT NETWORKS | Backhaul capacity expansion is required Source: Yankee Group

3. The Operators' Dilemma Operators must expand their market reach and introduce new differentiated services Their Networks need to be upgraded to keep up with Smartphone driven data demand and prepare for 4G/LTE However they often lack time, and internal resources and expertise JANUARY 28, 2010 3 AVIAT NETWORKS |

4. The Broadband Data Explosion – the AT&T experience 6,732% growth in traffic in past 13 quarters 3% of users generate 40% of traffic Added 2,000 new cellsites and 100,000 backhaul circuits in 2009 JANUARY 28, 2010 4 AVIAT NETWORKS | Sources: Ralph de la Vega, AT&T, New York December 9, 2009

5. More and More Cellsites Nearly 1 million new sites worldwide by 2013 Fiber is the natural choice for LTE backhaul, but connects less than 20% of sites today Copper lines will not provide the capacity scalability needed Microwave is the natural choice for sites where fiber cannot reach economically JANUARY 28, 2010 5 AVIAT NETWORKS | Source: Ovum, Wireless Backhaul Forecast 2009-2015, November, 2009

6. More and More Capacity Backhaul capacity growth for high-demand urban cellsite is129% CAGR 25 Mbit/s today to up to 300 Mbit/s in 3 years JANUARY 28, 2010 6 AVIAT NETWORKS | Source: Morgan Stanley, The Mobile Internet Report, December 15, 2009

7. The Mobile Internet Tsunami meets the Backhaul Bottleneck Backhaul is the central battleground for LTE network migration Even now backhaul is not meeting the demand of 3G/HSPA LTE backhaul requirements are still not well understood by operators JANUARY 28, 2010 7 AVIAT NETWORKS |

8. Mobile Backhaul Networks Must Evolve Mobile backhaul networks must evolve Maintain essential high- quality TDM voice services Gradual migration path to all-IP for next generation 4G/LTE JANUARY 28, 2010 8 AVIAT NETWORKS | Transition Maintain Transform

9. Evolved Mobile Backhaul Network JANUARY 28, 2010 9 AVIAT NETWORKS | Primary Reference Clock , 1588v2 Master NxE1/DS1 TDM Ethernet/IP ~ BSC ~ IP/Eth/MPLS Hybrid TDM + Ethernet/IP ~ ~ ~ MME MGW IP/Ethernet MPLS R4 LTE CORE ~ ~ aTLA ~ 2G/3G/ LTE/WiMAX RNC Sync Ethernet S-GW ~ ~ BSC Cellsite Gateway Aggregation Gateway ~ ~ ~ Distributed Sync Delivery Point Metro/Core Gateway 1588v2 Slave ~ CORE ACCESS/LOW-RAN AGGREGATION/Hi-RAN METRO

10. The Wireless Experts in Advanced IP Network Migration Aviat delivers best-of-breed technologies and has a well earned reputation for working by the side of its customers as they evolve their wireless infrastructure into an advanced IP network JANUARY 28, 2010 10 AVIAT NETWORKS |

11. Innovation is in our DNA We helped build the world’s mobile communication infrastructure Now we are solving the toughest problem for next generation mobile networks – the evolution to all-IP backhaul JANUARY 28, 2010 11 AVIAT NETWORKS |

12. 4G Wireless Backhaul for 4G Networks Our Eclipse™ Packet Node platform combines a smooth migration path with LTE-readiness Consistently rated #1 by Tier 1 operators worldwide JANUARY 28, 2010 12 AVIAT NETWORKS |

13. Eclipse™ Packet Node Highly scalable capacity throughput to 2 Gbit/s to meet the demands of LTE Hybrid TDM+Ethernet or all-IP transport Efficient nodal architecture simplifies networks and lowers operational costs Embedded Ethernet/IP intelligence and QoS Ultra reliable with proven field performance JANUARY 28, 2010 13 AVIAT NETWORKS |

14. Microwave Backhaul Capacity Evolution JANUARY 28, 2010 14 AVIAT NETWORKS | Payload, Mbit/s 2,000 Eclipse Packet Node 1,000 Metro Transport 620 Eclipse 380 200 155 Access Backhaul 40 6 5 6 11 40 2 70 90 7/8 23 18 Frequency Band, GHz

15. A Multi-Service, Multi-Architecture platform All-TDM (E1, E3, STM1) Hybrid TDM+IP All-IP Split-mount or all-indoor architecture options Terminal, repeater or complex nodes Full protection options JANUARY 28, 2010 15 AVIAT NETWORKS | All Indoor RF Unit (IRU, US only) Compact Outdoor RF Unit (ODU) Modular Indoor Unit (INU)

16. Gigabit IP transport for 4G/LTE Networks The only microwave transport platform to provide a complete convergence solution Highest nodal switching capacity Highest radio throughput on the market Hybrid or pure-packet transport Increased packet intelligence Ethernet aggregation and OAM ‘Distributed Sync’ over all-IP networks Integrated timing over packet networks JANUARY 28, 2010 16 AVIAT NETWORKS |

17. Eclipse Intelligent Node Unit The most compact nodal solution on the market Single indoor unit supporting multiple radio paths Hot-swappable radio and data access modules Support for all traffic types Cable-less traffic connections Complete solution in one box JANUARY 28, 2010 17 AVIAT NETWORKS |

18. Multi-Service Gateway JANUARY 28, 2010 18 AVIAT NETWORKS | Copper Carrier Ethernet Fiber Radio TDMoIP PWE Native TDM

19. Eclipse Packet Node Hybrid Architecture JANUARY 28, 2010 19 AVIAT NETWORKS | 500 Mbit/s DAC 16x Native TDM 1-16xE1/DS1 RAC 6X 500 Mbit/s 2 Gbit/s RAC 6X NCM TDMoIP 1-16xE1/DS1 500 Mbit/s RAC 6X 500 Mbit/s DAC GE Native Eth/IP 1-4xGigE RAC 6X INUe

20. The Leading Nodal Packet Transport Platform Multi-gigabit aggregate nodal switching capacity Next-generation Layer 2 Ethernet switch Enhanced traffic processing for maximum throughput Adaptive Coding and Modulation Next generation modem technology Co-channel operation with XPIC JANUARY 28, 2010 20 AVIAT NETWORKS |

21. The Key Solution for IP Wireless Network Evolution Manage your explosive packet traffic growth with industry leading transport capacity Extend your investment With seamless and low risk network migration, with continuity of existing TDM services Simplify your Network With a converged backhaul/transport solution Reduce capital and operational network costs JANUARY 28, 2010 21 AVIAT NETWORKS |

22. AVIATNETWORKS.COM