Avaya Corporate Overview December 2009 2009 All

Agenda 4 Corporate Facts – Value of Nortel Enterprise Solutions (NES) Acquisition – Financial

Corporate Facts © 2009. All rights reserved. 3

4 Common Strategic Vision 4 Focused on Communications Innovation in the Enterprise 4 History of Reliability, Scale-ability, Investment Protection 4 Expertise 4#1 or #2 in All Markets Served (except Data) © 2009. All rights reserved. 4

Avaya and NES A Compelling Combination 4 Large, loyal Customer Base 4 Strong Channel Centric Go-to-Market Model 4 Accelerated innovation through added expertise and the ability to increase investment 4 Opportunity to provide maintenance services to the NES base and the NES Partner Community 4 Geographic Scale and Industry Breadth 4 Innovations that Synergistically Enhance the Portfolio © 2009. All rights reserved. 5

Avaya is the global business communications expert delivering open and flexible communication systems, that transform the way people collaborate to enhance performance and enable growth for companies small to large. © 2009. All rights reserved. 6

Avaya’s Global Footprint Key Corporate Locations Avaya Lab Locations 10, 000+ Channel Partners 32 Global Delivery Support Centers 20, 000+ Employees Operating in 55 Countries © 2009. All rights reserved. 7

NES Acquisition Financing 4 Purchase Price $900 M 4 Financing is a combination of cash, debt and equity 4 Additional financing committed – cost and pricing of debt not impacted by rating 4 NES Financially Restructuring Assets as Required by Bankruptcy before purchase by Avaya 4 Apply Avaya Operational Improvement Programs © 2009. All rights reserved. 8

Avaya Financial Performance Over Time Total Revenues Gross Margin EBITDA and % of Revenue

Avaya and NES – Combined 4 Targeted Performance Levels Annual Revenue ~ $5. 5 Billion EBITDA / Revenue Operating Margin Employees Leverage (Debt / EBITDA) 22% 18% 15, 000 5. 9 x 28% 22% 20, 000 3. 4 x to to to Avaya makes no representations or warranties regarding this financial information. Past performance may not be indicative of future performance. to © 2009. All rights reserved. 10

Strategic Priorities FY 10 Profitable Growth Operational Improvements FY 10 Increased Relevance NES Integration Avaya makes no representations or warranties regarding this financial information. Past performance may not be indicative of future performance. © 2009. All rights reserved. 11

Avaya and NES: A History of Innovation © 2009. All rights reserved. 12

Avaya Innovation and Research Avaya Labs Rich in Heritage 4 Industry leading 5200 patents or patents pending 4 Avaya Labs Locations in: Australia India Singapore Canada Israel U. S. Germany Japan U. K. 410, 000+ Dev. Connect member companies* with ~600 gold/platinum 4475+ Independent Software Vendors with certified applications on Avaya systems * This number does NOT include over 200 companies that are currently members in both the Avaya and NES programs. © 2009. All rights reserved. 13

Innovation Timeline Enterprise Communications Turning Points Digital IP SIP ACD+PBX in Single Platform Home Agent one-X®Agent Processor Duplication IP Softphone one-X® Portal Call Vectoring IP Trunking one-X® Communicator DNIS + ANI Session Enablement Services © 2009. All rights reserved. 14

SIP Innovation and Leadership 4 Avaya SIP Leadership – Enterprise deployments with tens, hundreds, thousands of SIP users – Over a million SIP trunks/lines – World-wide penetration with SIP deployments in 55 countries – First enterprise vendor to be named SIPConnect compliant 4 One-X Mobile Interoperability – Compatible with largest number of handsets and carriers 4 Microsoft Interoperability – Unified Desktop – Unified Messaging – Mobility – Conferencing 4 Avaya Aura™ is the First SIP platform to Support Fully-Sequenced Applications © 2009. All rights reserved. 15

Avaya Portfolio © 2009. All rights reserved. 16

The Markets We Serve UC CC Data Services Small & Medium Enterprise Midsize Enterprise

Unique Customer Value to Every Segment Enterprise 4 Accelerated SIP Applications 4 Expanded Global Expertise Midsize Enterprise 4 Cost effective platform with the lowest TCO 4 Evolutionary Path Small & Medium Enterprise 4 Simplicity 4 Broader Channel Coverage and Support © 2009. All rights reserved. 18

Delivering Value Across the Enterprise… IT Increased Speed at a Lower Cost Line of Business Agility • Smooth evolution • Improve workflow outcomes • Simplified, virtualized infrastructure • Always on…always contextually aware • Rapid deployment End User Simplified Communications • Smooth transition across modalities • Contextual and persistent communications • Uptime © 2009. All rights reserved. 19

Common Evolutionary Path Preserve & Enhance Call Center Evolution Investments Best. PBX Disaggregation in Class Capability IT Convergence Accelerating Your Evolution Migration that fits your Communications Enabled Applications business needs Plug & Play UC Communications Multimodal A Path Communications for Every Customer Complementary technology roadmaps driving accelerated execution © 2009 Avaya Inc. All rights reserved. © 2009. 20

Enterprise Roadmap Evolution Principles 4 Avaya Aura™ as a core component, expanded with new technologies – Accelerating application & services integration toolkit – Expanding communications enablement of business apps 4 Rich integration into Avaya Aura™ for NES and Avaya Core Telephony Systems Providing Investment Protection and Added Value 4 Evolve Customers Smoothly to a Single Advanced Next-Generation SIP-based Contact Center Platform 4 Continue the Current Data Networking Roadmap © 2009. All rights reserved. 21

Customer Roadmap Routes 4 Unified communications architecture 4 New capabilities acceleration 4 Customized, industry-specific solutions Extend Grow 4 Application availability and extension Protect 4 Richer support and professional services 4 Investment protection, order availability © 2009. All rights reserved. 22

How Avaya Will Lead Expert Open Branch Office Clients Main Office Suppliers Mobile Workers

Leadership Positions Avaya Named to the 2009 World’s Most Ethical Companies List Unified Communications Gartner Magic Quadrant * Enterprise Comm Leader * UC Leader #1 Telephony Solutions 19% revenue share 1 #1 Unified Communications 21% revenue share 1 #1 Audio Conferencing 24% licenses 6 #1 Enterprise messaging 21% revenue share 3 Contact Center Gartner Magic Quadrant Leader * Contact Center Infrastructure * Interactive Voice Response * Enterprise Voice Portals Small & Mid Enterprise #2 in lines shipped for SME Telephony Systems – 10% share 5 #1 Contact Center / ACD 35% revenue share 4 #2 Outbound Dialers 16% (NA revenue share) 2 #2 CTI (APAC share)2 18% # 1 revenue share in Maintenance Services WW 7 [1] Dell’Oro Group; [2] Frost & Sullivan; [3] T 3 i Group; [4] Gartner, Inc; [5] Canalys 6] MZA, Ltd. [7] Intellicom Analytics; all share stats for calendar 2008 Avaya Inc. and Gartner, Inc. are both owned in part by Silver Lake, a leading financial investment firm. Gartner research is produced independently by Gartner analysts, without influence, review or approval of their outside investors or shareholders. For further information on the independence and integrity of Gartner research, see Guiding Principles On Independence and Objectivity on Gartner’s website, http: //www. gartner. com/it/about/omb_guide. jsp © 2009. All rights reserved. 24

Industry Solution Leadership 4 Avaya Products and Solutions Used Worldwide in: – 70% of the largest global banks* – 10, 000+ educational institutions* – Highest-performing health care & equipment companies (Forbes) – 24+ Country-level Governments including the US Department of Defense in all 50 states* 4 10 million business users leverage Avaya solutions every day 4 100 million messages are delivered daily. . 4 Over 90% of the Fortune 500 leverage Avaya communications 4 Official Converged Network Infrastructure Supplier for the 2010 Vancouver Olympics 4 Avaya now has roughly 33% of the worldwide market share in the IP telephony market (IDC) *Source: NES customer database © 2009. All rights reserved. 25

Customer Service Expertise 480% of Business. Week 2008 ‘Customer Service Champs’ chose Avaya for

Global Support Services Providing Best-in-Class Remote Monitoring, Diagnostics, & Trouble Resolution ~6800 services professionals, 26 combined network operations and technical support centers via EXPERT Systems. SM watching over customers and supporting partners with round-the-clock support Shift 4 Shift 3 Shift 2 Canada Maidenhead UK Belgium Ottawa Billerica Santa Clara Milpitas Netherlands Germany France Denver Raleigh Coppell, Richardson Spain Hungary Switzerland Italy Austria Gurgaon Bangalore Mexico Colombia Shift 1 Russia China India Japan Hong Kong Singapore Brazil Argentina Australia © 2009. All rights reserved. 27

Conclusion © 2009. All rights reserved. 28

Summary 4 Strong Market Leader – Global Coverage – Financial Health – History in Technological Leadership 4 Innovation – Vision for Context-Aware, Sessions-Based Communications – Avaya Aura™ Architecture – Open, Standards-based on SIP and SOA – Reliability, Security, Use-ability 4 Market Leadership & Expertise in UC & CC applications © 2009. All rights reserved. 29

What You Can Expect from Avaya 4 Relentless Focus on Ease of Doing Business 4 Investment in Innovation 4 Simplification 4 Customer Centric Focus 4 Increased Investment in Developing Our Channel Ecosystem © 2009. All rights reserved. 30

thank you name email phone © 2009. All rights reserved. 31

Avaya’s Global Footprint Toronto Denver, CO Santa Clara, CA Mexico City Guilford, UK Frankfurt, DE Basking Ridge, NJ Headquarters Beijing Shanghai Israel Research Triangle Park, NC Japan Dubai Mumbai Static version of Global Footprint slide. Singapore São Paulo Key Corporate Locations Avaya Lab Locations 10, 000+ Channel Partners Sydney 32 Global Delivery Support Centers 19, 000+ Employees Operating in 55 Countries © 2009. All rights reserved. 32