1. Speaker: Title: Date: Avaya Communication Server 1000 Release 7.5 Overview v 3_0 Building the Foundation for Collaboration with Avaya Aura™ November, 2010

2. © Avaya Inc. 2010. All rights reserved. Key Topics Avaya Global Unified Communications Market Leadership and Roadmap Strategy Avaya Leadership Summary CS 1000 Release 7.5 Summary and Next Steps CS 1000 Release 7.5 CS 1000 Release 7.5 Features and Benefits CS 1000 Evolution Communication Server 1000 Evolution and Product Roadmap 2

3. © Avaya Inc. 2010. All rights reserved. Avaya Global UC Market Leadership #1 Unified Communications revenue 1 #1 Telephony Solutions revenue 1 #1 Audio Conferencing licenses 2 #1 Enterprise messaging revenue 3 #1 Maintenance Services revenue 4 Gartner Magic Quadrant Leader in Unified Communications, Enterprise Communications and Contact Center quadrants 5 Avaya named to the 2009 world’s most ethical companies list Avaya - Nortel Enterprise 32% Global Unified Communications revenue share Source: Dell’Oro Group, Calendar 2008 Source: [1] Dell’Oro Group; [2] MZA, Ltd; [3] T3i Group;.[4] Intellicom; [5] Gartner Inc. NOTE: Current analyst data includes results for LG-Nortel and other shipment activity that will be restated and may change in future analyst reports. Growing to a $20 billion market Others 29% Cisco 18% Siemens 10% Alcatel- Lucent 11% 3

4. © Avaya Inc. 2010. All rights reserved. The Magic Quadrant is copyrighted by Gartner, Inc. and is reused with permission. The Magic Quadrant is a graphical representation of a marketplace at and for a specific time period. It depicts Gartner's analysis of how certain vendor’s measure against criteria for that marketplace, as defined by Gartner. Gartner does not endorse any vendor, product or service depicted in the Magic Quadrant, and does not advise technology users to select only those vendors placed in the "Leaders" quadrant. The Magic Quadrant is intended solely as a research tool, and is not meant to be a specific guide to action. Gartner disclaims all warranties, express or implied, with respect to this research, including any warranties of merchantability or fitness for a particular purpose. This Magic Quadrant graphic was published by Gartner, Inc. as part of a larger research note and should be evaluated in the context of the entire report. The Gartner report is available upon request from Avaya. Magic Quadrant for Unified Communications Bern Elliot, Steve Blood July 28, 2010 Gartner Magic Quadrant for Unified Communications Full report is available at http://www.gartner.com/technology/media- products/reprints/avaya/vol7/article1/article1.html 4

5. © Avaya Inc. 2010. All rights reserved. The Magic Quadrant is copyrighted by Gartner, Inc. and is reused with permission. The Magic Quadrant is a graphical representation of a marketplace at and for a specific time period. It depicts Gartner's analysis of how certain vendor’s measure against criteria for that marketplace, as defined by Gartner. Gartner does not endorse any vendor, product or service depicted in the Magic Quadrant, and does not advise technology users to select only those vendors placed in the "Leaders" quadrant. The Magic Quadrant is intended solely as a research tool, and is not meant to be a specific guide to action. Gartner disclaims all warranties, express or implied, with respect to this research, including any warranties of merchantability or fitness for a particular purpose. This Magic Quadrant graphic was published by Gartner, Inc. as part of a larger research note and should be evaluated in the context of the entire report. The Gartner report is available upon request from Avaya. Magic Quadrant for Corporate Telephony Steve Blood, Jay Lassman, Geoff Johnson August 3, 2010 Gartner Magic Quadrant for Corporate Telephony Full report is available at http://www.gartner.com/technology/media- products/reprints/avaya/vol7/article2/article2.html 5

6. © Avaya Inc. 2010. All rights reserved. Unified Communications Roadmap Strategy  Continue to benefit with existing systems  Upgrade to current SIP-ready releases  Richer support and professional services Protect  Integrate current systems into Avaya Aura ™  Immediate cost savings and simplification with direct CS 1000 to Avaya Aura™ integration  Share SIP-based applications across all users and locations Extend  Evolve to an open and flexible enterprise-wide real-time architecture  Access to new innovative Avaya Aura™ applications and solutions  Industry-specific vertical solutions Grow 6

7. © Avaya Inc. 2010. All rights reserved. Legacy Meridian 1 CS 1000 MCS 5100 BCM/SRG Branches CS 2100 SL-100 Legacy DEFINITY® Evolutionary Path for Every Customer Communication Manager AS 5300 Avaya Aura ™ Service Providers Apps All current systems can be SIP connected Lower costs, accelerate new application deployment, and serve customers everywhere Multivendor Integral 55 (Germany/EMEA) 7

8. © Avaya Inc. 2010. All rights reserved. Collaboration Solutions Collaboration Solutions Application & Services Integration Voice/Video Services Presence Services Session Manager System Manager Interaction Solutions Interaction Solutions Performance Analytics Performance Analytics Data Infrastructure Communications Infrastructure Clients Video Endpoints Deskphones Avaya Agile Communication Environment™ (ACE) Unified Communications Roadmap Strategy Reference Architecture Integrate AS 5300 SIP services, CS 1000 “NRS” into Avaya Aura ™ Commitment to open multivendor solutions ACE accelerates Avaya Aura ™ business application integration Evolve to common SIP phones, clients, video solutions Extend & grow current CS, CM and leverage data networking Evolve to common management and analytics Leverage common Avaya Aura ™ Presence and Instant Messaging Evolve to common collaboration and messaging applications 8

9. © Avaya Inc. 2010. All rights reserved. Communication Server 1000 Evolution Meridian 1 Communication Server 1000 Release 7.0 Software / COTS Communication Server 1000 Release 7.5 9  More Open, Simple and Secure  Increased Scalability to 40,000 Users per Server  Full SIP - Line, Trunk, Video, Media, Mobility  Software Centric with LINUX and COTS  Geographic Redundancy and Resiliency  Avaya Aura™ Integration

10. © Avaya Inc. 2010. All rights reserved. CS 1000 Integration Roadmap Today12 Months18-30 Months Extend value with Avaya Aura ™  Compelling ROI  Shared SIP Applications  Common User Interfaces Avaya Aura ™ SIP-based Access CS 1000 BCM branches CS 1000 BCM branches CS 1000 R6 (today) CS 1000 R7R7.5 Continue to add CS 1000 phones and systems Upgrades and Extensions Application & Services Integration Voice/Video Services Presence Services Session Manager System Manager CS 1000 BCM branches CS 1000 BCM branches Meridian 1 upgrade  1100/1200 SIP phones Avaya Aura ™ ready 10 Integrated Access Element

11. © Avaya Inc. 2010. All rights reserved. Open Network Wide IP Media Services SIP Line & Trunk progression Contact Center Integration Integrated IM and Presence Enhanced IP Call Recording IPv6 Co-resident solutions Continued Integration with Microsoft & IBM UC Secure Integrated SIP Trunk Bridge Intra-System Signaling Security (ISSS) Enhancements Enhanced Security Management Security Domain Manager (SDM) Improvement UCM Security Server Demote Resilient Automatic Data Replication Survivable SIP Media Gateways Increased capacity Removal of distance limitations Enterprise Converged Branch Design for Operability New High performance Hardware Simple Centrally Managed High Scalability Solution System Capacity increases Centralized Management (TM retirement) Simplified Deployment & Configuration IP Attendant Console Incoming & Internal CLID Customization IP Line Enhancements CS 1000 Release 7.0 Content Summary August 2010 11

12. © Avaya Inc. 2010. All rights reserved. CS 1000 Upgrade & Evolve Path Release 7.5 (Nov ’10) Hybrid CS 1000 and Communication Manager Networks Multi-Site and Mid- Market Enhancements Rich Integration into Avaya Aura™ architecture Release 5 or earlier Release 7.0 (Aug‘10) Enhanced Scalability for Multi-Site Centralization Cost Effective UC for Mid-Market SIP Network Access Improvements Building Increasing Value for CS 1000 Customers Release 6.0 Large Multi-Site Centralization Security Enhancements Simplified Management CS 1000 Release 7.5 Solution Value Significant cost advantage over “Rip & Replace” Evolutionary path for customers to retain current investment while gaining value Enables smooth migration to Session Manager through replacement of NRS Significant incremental value to customer with access to Avaya Aura™ Applications CS 1000 Release 7.5 Solution Value Significant cost advantage over “Rip & Replace” Evolutionary path for customers to retain current investment while gaining value Enables smooth migration to Session Manager through replacement of NRS Significant incremental value to customer with access to Avaya Aura™ Applications 12

13. © Avaya Inc. 2010. All rights reserved. CS 1000 Release 7.5 – The Integration Release  What is it? – Enables CS 1000 customers to integrate and leverage the Avaya Aura™ applications and services  Why does it matter? – Provides CS 1000 investment protection with an easy transition to Avaya Aura™ when appropriate – Ability to have heterogeneous network sharing capabilities across the network  Key Features – Common SIP based network routing engine for heritage Nortel and Avaya customers – Consolidated management platform for entire Avaya portfolio – Feature rich interworking between CS 1000 and CM users (SIP Peering) – Direct SIP connectivity (without requiring SM) to Avaya Aura™ Messaging, Avaya Aura™ Conferencing 13 Integrate into Avaya Aura ™ CS 1000 TDM & IP Phones Session Manager System Manager Presence Services Voice/ Video Services Avaya CM

14. © Avaya Inc. 2010. All rights reserved. CS 1000 Release 7.5 Content Summary November 2010 14 Avaya Aura™ Integration Content  Avaya Aura™ Session Manager 6.1 - replacing NRS  Avaya SIP Peering - CS 1000 Peer Interworking with Avaya Aura™  Converged Management Solution - UCM/System Manager 6.1  Support for Application Sequencing - Extended Local Calls  CS1000 use of Avaya Aura™ Presence Server (available 1Q2011)  Support for one-X® Communicator Client (voice & video)  Support for one-X® Mobile Lite Client on iPhone  Integration of CS 1000 IP Media Services with the Avaya Aura™ Media Server  Support for Avaya Aura™ Conferencing  Support for Avaya Aura™ Messaging  Support for SIP Line TLS and sRTP  G.722 codec support Other Enhancements  Branding software and documentation to Avaya  SIP ACD for IVR  Microsoft OCS and IBM Sametime Integration - interoperability  PI PEP Integration in 7.5 Feature Rich Interworking Consistent User Experience Across Mixed Environments Simplified Management Lower Operational Costs Access to next-generation Avaya Aura™ applications, anywhere, anytime Increased Employee Productivity and Greater Customer Responsiveness

15. © Avaya Inc. 2010. All rights reserved. CS 1000 Release 7.5 Market Positioning SIP SIP CTI Presence Named Apps Sequenced Apps Upgraded CS 1000 systems CPMGCPMG MCDN over SIP Transparency b/ CS1Ks one-X® Communicator 15 CS 1000 Customer Value Applicable to all segments (large, small, multi-site, CM/CS 1000) Avaya Aura™ Integration replaces NRS with Session Manager for all multi-site deployments. Retain MCDN and benefits from feature transparency between CS 1000 nodes. Feature rich interworking for CS 1000 and Communication Manager users alike Unified Management reduced costs single sign-on to System Manager and UCM Application Sequencing of productivity enhancing Avaya Aura™ applications for all CS 1000 users Delivering IM and Presence for any CS 1000 and CM users in the network with Presence Server (1Q2011 Target) Common and consistent IP Media services for CS 1000 and Avaya Aura™ users (MOH, Tones, Announcements) Re-use 1100 and 1200 series deskphones on SM/CM with SIP firmware upgrades Direct SIP connectivity (without requiring SM) to Avaya Aura™ Messaging, Avaya Aura™ Conferencing, one-X® Soft Client simplifies network complexity Benefit from extended CS 1000 mobility capabilities with new one-X® Mobile Lite Client on I-Phone Enjoy the latest one-X® Communicator Client (voice & video) for more user collaboration and more productivity

16. © Avaya Inc. 2010. All rights reserved. CS 1000 Release 7.5 and Avaya Aura™ Unique Integration SIP PSTN 16 Collaboration Solutions Collaboration Solutions Application & Services Integration Voice/Video Services Presence Services Session Manager UCM / System Manager Interaction Solutions Interaction Solutions Performance Analytics Performance Analytics Avaya Agile Communication Environment™ (ACE) Session Border Controller Multimedia Application Services Key Benefits -Feature Rich Applications – Avaya Aura™ Messaging Avaya Aura™ Conferencing, Sequenced Apps, ACE, UC, Presence, one-X®, MAS, NGCC -Common web based management platform -Solution for all installed base segments -Full SIP MCDN support between CS 1000 systems -Rich SIP Peering with CM -Ongoing Evolution through Avaya Aura™ What is It? -Upgraded M1/CS 1000 becomes an Integrated Access Element Unique I in Avaya Aura™ -Direct SIP connectivity to UC applications -Session Manager replaces Network Routing Server (NRS) Communication Manager NG Unified Messaging Meeting Exchange NG Context Center Microsoft applications IBM applications Heritage Nortel Applications Heritage Nortel Applications SIP SIP CTI Presence Implicit User CS 1000 R7.5 Integrated Access Element CS 1000 R7.5 Integrated Access Element

17. © Avaya Inc. 2010. All rights reserved. Session Manager 6.1 Combine NRS benefits into SM  NRS SIP capabilities incorporated into Session Manager 6.1 – Key CS 1000 SIP functionality of NRS incorporated into Session Manager – Enables SIP Peering between CS 1000 and CM – Full MCDN/SIP passed between CS1000 nodes Key Benefits – Simplified and centralized SIP routing from a single management tool & database – Improved Scalability, Redundancy & Resiliency – Centralized numbering/dialing plan via Avaya Aura™ SIP core – Integrate via SIP with broad range of Avaya SIP-ready applications – Optimized access to centralized & distributed Avaya Aura™ applications – Centralized access to SIP Carriers  Migration from NRS to SM 6.1 – Database migration tool available – Migration support for customers with multiple NRSs Session Manager CS 1000 17

18. © Avaya Inc. 2010. All rights reserved. Application & Services Integration Communication Manager (FS) Presence Services Session Manager UCM / System Manager Avaya Agile Communication Environment™ (ACE) Multimedia Application Services NG Unified Messaging Meeting Exchange NG Context Center Avaya SIP Peering one-X® Portal one-X® Mobile CS 1000 Communication Manager (ES) Communication Manager Branch o o o Mobile-X clients PSTN clients one-X® clients TDM clients UNIStim clients SIP clients Avaya Aura™ SIP clients Wireline/ Wireless Carrier Wireline/ Wireless Carrier  SIP Peering between elements for CS 1000 and Communication Manager – CS 1000 defined as a peer system to CM Key Benefits – Enabling common telephony feature interworking between CS1000 and CM systems – IM & Presence across all sites and all users 18

19. © Avaya Inc. 2010. All rights reserved. Avaya SIP Peering  Basic Call – Uniform Dialing Plan – Coordinated Dialing Plan  Call Hold/Retrieve  Line Identification – Calling/Connected Line Presentation/Restriction  Name Identification – Calling/Connected Name Presentation/Restriction  Called Number  Called Name  Messaging support – MWI – Originally Called Number – Redirecting Number – Redirection Reason  Call Forwarding Unconditional  Call Forwarding Busy / Hunting  Call Forwarding NA  Call Transfer  Loop Avoidance  Virtual Access to Private Network  AdHoc Conferencing  Common CS 1000 and CM SIP Peering Features  SIP MCDN peering between CS 1000 elements is available  Supported Systems/Releases – CS1000 systems running R7.5 with Session Manager R6.1 – CM Feature Server (FS) or CM Evolution Server (ES) sites with CM release R6.0 + 19

20. © Avaya Inc. 2010. All rights reserved. Converged Management Solution – UCM To System Manager 6.1  Migrating to a single unified management environment – Common Element Manager strategy Key Benefits – Single centralized administration, authentication for secure and simple network administration – Web-based integrated management enables centralized management, simplifies operations and improves efficiency and security – CS1000 7.5 Applications in System Manager 20  A single server running both UCM and System Manager will act as a UCM Primary Security Server – A UCM+SMGR server will be installed with applications required to manage the member server(s) in the security domain R6.0 + – Logging module (OAM logs and application logs) takes advantage of System Manager logging capabilities

21. © Avaya Inc. 2010. All rights reserved. SIP Network TDM, UNIStim IP, SIP Lines Extend application sequencing and foundation services to intra- CS 1000 calls (i.e. local calls) Local Intra AE call route --------SIPTrunk-------- Application Sequencing – Extended Local Calls  Extended Local Calls (ELC) is a new class of service feature that enables delivery of Avaya Aura™ sequenced applications to CS 1000 users Key Benefits – Simple, effective Avaya Aura™ application delivery to CS 1000 users - TDM, UNIStim, SIP Lines – Extend CS 1000 deskphone use – No additional CS 1000 DSP capacity consumed  CS 1000 local call information managed by Avaya Aura™ core  Avaya Session Manager routes CS 1000 local calls to a preconfigured ELC SIP trunks  Avaya Aura™ apps delivered to CS 1000 local call users in addition to SIP trunk calls  Zero charge SIP Access ISM licensing Session Manager CS 1000 21

22. © Avaya Inc. 2010. All rights reserved. Subscriber Manager Avaya Aura™ Presence Solution – CS1000 IM/Presence  Enabling Avaya Aura™ Presence Services 6.1 and System Manager 6.1 to deliver IM and presence to CS 1000 users – System Manager leverages Subscriber Manager – Presence Services 6.1 enables IM/P to all CS1000 users Key Benefits – Avaya Aura™ Presence Solution delivers IM and Presence to all CS 1000 users – Enables federation across CS 1000 and CM users across the network regardless of line type  Avaya one-X® Communicator client for IM/Presence – one-X® replaces 3456 UC Client – SIP Line for Voice and Video – IM and Presence client – Point to point Video – Can also act as simple IM/P client for non-SIP line users Avaya Aura TM Presence Services 6.1 Presence Engine Instant Messaging Session Manager CS1000 Publishes Telephony Presence to PS one-X® Communicator. SIP Line to CS1000 one-X® Communicator XMPP to PS 6.1 for IM and Presence System Manager Availability: 1Q2011 MGC with DSP DB CS1000E CPPM–Call Svr. CPPM–Sig. Svr. SIPL MGC with DSP DB CS1000E CPPM–Call Svr. CPPM–Sig. Svr. MGC with DSP DB CS1000E CPPM–Call Svr.CPPM–Call Svr. CPPM–Sig. Svr.CPPM–Sig. Svr. SIPL 22

23. © Avaya Inc. 2010. All rights reserved. Avaya one-X® Communicator 6.1 – Voice and Video  Supported on CS 1000 R7.5 and MS Windows PCs Key Benefits – Delivering presence capability to any CS 1000 phone type user – More functionality, more collaboration, more productivity  Over 30 CS 1000 SIP line functionality supported – Telephony and Mid-Call features (hold, transfer, etc.) – Local contact list – Call logs – Message waiting indicator (MWI) – Click-to-call from browsers (IE or Firefox) – Audio conferencing – Point-to-Point video (H.264) – Search/display corporate or personal directories – Busy State/Presence status updates 23

24. © Avaya Inc. 2010. All rights reserved. one-X® Mobile Lite for iPhone  one-X® Mobile Lite solution for compatible OS3/4 iPhones Key Benefits – Avaya Aura™ Presence status updates for CS 1000 iPhone users – Toll avoidance on long distance calls significantly reduces enterprise mobility costs  Mobile GUI for CS 1000 Mobile Extension feature eliminates manual keypad entry – Service access dialing – Feature code dialing – Corporate directory/contacts search & click-to-call – Mobile number privacy – office CLID displayed for iPhone calls – Single number reach – iPhone rings with deskphone – Single button feature activation – Cellular voicemail avoidance  CS 1000 CDR for mobile calls 24

25. © Avaya Inc. 2010. All rights reserved. Media Services – CS 1000 and Avaya Aura™ Media Services Integration Application & Services Integration Voice/Video Services Presence Services Session Manager System Manager Avaya Media Server  Integrating CS 1000 and Avaya Aura™ Media Services solution  Enabling delivery of common shared media resource between CS 1000 and CM – Ad-hoc conference, IP Attendant – Music, Announcements, Tones  Key Benefits – Avaya Aura™ Presence status updates for CS 1000 iPhone users – Delivery of IP Media services anywhere in the network – Consistent user experience with high quality voice, rich feature availability – Reducing Customer’s Total Cost of Ownership – Reduces CS 1000 hardware costs (MIRAN, DSP) and network bandwidth costs CS 1000  Session Manager administered  Centralized or distributed network-based services  Flexible and efficient floating license model  Geographical redundancy / Failover resiliency 25

26. © Avaya Inc. 2010. All rights reserved. Avaya Aura™ Conferencing Supported in CS1000 R7.5 26  Delivering next generation conferencing solutions to the CS 1000 installed base – Direct connectivity to CS 1000 or via SM 6.1 – Avaya Aura ™ Conferencing 6.0 Standard Edition – Meeting Exchange 5.2 Enterprise Edition Key Benefits – Simplifying conferencing solution while improving user experience – Better voice quality for global calls and reduce max ‘mouth to ear’ delays – Reduces WAN traffic on global calls and toll charges  Avaya Aura™ Conferencing Benefits for CS 1000 – Native Avaya Web Conferencing, as well as Microsoft / IBM / Adobe UC integrations – Scale and resiliency – per conference call, per system – Centralized bridge for multi-location deployments – Designed to cascade over globally dispersed bridges – Keeps “in theater” conferences local

27. © Avaya Inc. 2010. All rights reserved. Avaya Aura™ Messaging Supported in CS1000 R7.5  Delivering next generation Messaging solutions to the CS 1000 installed base – Direct connectivity to CS 1000 or via SM 6.1 – Avaya Aura™ Messaging 6.0 – Modular Messaging 5.2 Key Benefits – Providing common consistent messaging solution for users anywhere, anytime – Simplified administration with lower messaging infrastructure costs Avaya Aura™ Messaging benefits for CS 1000 – Rich features, multivendor web collaboration and user flexibility – Greater scale and resiliency – Integrate Avaya one-X® Speech to easily manage your messages with verbal directions  CallPilot 5.0 available to existing CS 1000 systems – SU 9 available November 2010 deliver on-going enhancements – New 1006r offered in 96-channel/96-MPU or 192-channel/288-MPU stand-alone or high-availability 27

28. © Avaya Inc. 2010. All rights reserved. SIP Line TLS and sRTP – SIP 4.0 Firmware and SIP Line Security  SIP TLS/SRTP support with CS1000 Release 7.5 – Enhancements in SIP 4.0 for improved interworking with CS1000 R7.5 Key Benefits – Enhanced security and interworking with standards- based implementation  Built on top of CS1000 7.0 / SIP 3.2 which brought – Expanded SIP line functionality Multi-user Login MLA/BLA – Security Enhancements Certificate based authentication – IPv6 support – Emergency Services Enhancements / E911  Improved Usability – USB Headset support – Wideband codec (G.722) support 1100 Series IP Deskphone 1200 Series IP Deskphone 28

29. © Avaya Inc. 2010. All rights reserved. G.722 Wideband Codec Support – UNIStim 5.0 Release  Implementation of G.722 wideband high-quality audio codec Key Benefits  Customer benefits from richer audio quality and improves the end user experience  Significant improvement in speech quality over older narrowband codecs such as G.711  All CS1000 IP components support G.722: Call Server and Signal Server – TPS, SIP gateway, H323 gateway, SIP Line, Media Services, Element Manager  UNIStim 5.0 available November 2010 supports G.722 – Support for Push messaging – Text-based messaging, Audio Alerts, and Display push 29

30. © Avaya Inc. 2010. All rights reserved.  Current CS 1000 software and hardware performs at optimum level  Avoid high support and maintenance costs associated with outdated systems  Eliminate the interoperability and compatibility issues with older equipment  Avoid risk of critical CS 1000 hardware obsolescence  Ensures supportability by Avaya and partners  Future Proof your mission critical telephony system with Release 7.5 and Avaya Aura™ integration CS 1000 Release 7.5 Business Continuity & Life Cycle Management 30 Key Benefits  Delivering Business Continuity and Flexibility for today’s economic conditions  Improved TCO from simplified network and increased system performance  Take advantage of the latest Productivity, Mobility and UC solutions for a competitive advantage  Investment protection with ability to Protect, Extend, Grow existing infrastructure  Available marketing programs make it the best time to upgrade your CS 1000

31. © Avaya Inc. 2010. All rights reserved. Addressing Today’s Enterprise Business Challenges CS 1000 7.5 Solution Benefits 31 CS 1000 Release 7.5 Solution Benefits  Driving Productivity and TCO Improvements  Enabling Workforce Mobility  Reliability of the network  Security of your system and its users  Scalability & System Performance  Desire to move to open standards  Solution integration & network complexity  Avaya Aura™ applications, Rich features, Centralization  One number reach, Mobile and one-X® soft clients  No single point of failure, flexible redundancy options  Standards-based Security,E911, Secure remote access  Up to 40,000 users per system, 150,000 High Scalability option  SIP, Linux and COTS  Future proof flexible architecture with Avaya Aura™ integration

32. © Avaya Inc. 2010. All rights reserved. CS 1000 Release 7.5 and Avaya Aura™ – A Compelling Value Proposition  CS 1000 evolution and integration with Avaya Aura™  Key Values for Meridian 1 / CS 1000 customers – Session Manager – highly scalable and robust network architecture with cost savings from consolidation, access to sequenced apps, advanced routing capabilities. – Avaya Aura™ Conferencing – Feature rich, multi-modal, centralized collaboration services, scalability – Avaya Aura™ Messaging – Next generation centralized unified messaging – Avaya Aura™ Presence solution – Feature rich IM & presence solution spanning Nortel/Avaya heritage base customers and federation with Microsoft/IBM, solution including telephony state for CS 1000 users – one-X® Communicator Client – Feature rich, common client experience for soft & mobile clients, twinned (same phone number) for M1/CS 1000 desktops – System Manager/UCM – common, feature rich management tools with centralized deployment model.  Upgrade to current for best support/services lifecycle CS 1000 integrated into Avaya Aura ™ CS 1000 Session Manager System Manager Presence Services Voice/ Video Services Avaya CM 32

33. © Avaya Inc. 2010. All rights reserved. Summary and Next Steps Summary  Protect your CS 1000 investment, simplify and lower TCO and on-going support with CS 1000 Release 7.5 upgrades  Extend business value with new SIP- connected productivity applications and accelerate business processes with Avaya ACE™  Grow at your own pace into the Avaya Aura ™ enterprise-wide architecture and enhanced collaboration and customer service solutions Next Steps  Adopt CS 1000 Release 7.5, become SIP-ready  Incrementally add “self funded” application value  Start detailed discussions with Avaya and partners PLUG & PLAY COMMUNICATIONS 33

34. © Avaya Inc. 2010. All rights reserved. Thank You Q&A 34