1. Modern Communications ROI Jeffrey Ridley Director of Product Management ShoreTel, Inc.

2. © 2009 ShoreTel, Inc. All rights reserved worldwide. Source Data: Ferris Research, Inc., Wainhouse Research, Nemertes Research, Alinean Research, The Tolly Group Can you afford the Status Quo? 10 year analysis based on VoiceCon standard large enterprise configuration: 1,500 users across 3 sites 1 0 5 10 15 20 25 30 $M 1 ShoreTel Implementation and training Capital cost for network upgrade Capital cost for telephony system TDM $6.72 $26.37 Long distance charges Network costs Electricity consumption System management, MACs, downtime Support services

3. © 2009 ShoreTel, Inc. All rights reserved worldwide. Modernization – Drives Down Ongoing Costs Cost of Operations Cost of Maintenance Cost of Energy Cost of Training Cost of Lost Productivity 2

4. © 2009 ShoreTel, Inc. All rights reserved worldwide. Modernization – Drives Down Ongoing Costs Cost of Operations Cost of Maintenance Cost of Energy Cost of Training Cost of Lost Productivity 3 Cost of Telephony Services Via Leveraging SIP and IP

5. © 2009 ShoreTel, Inc. All rights reserved worldwide. A Look at a SIP Implementation 4 Unified Communications System The World

6. © 2009 ShoreTel, Inc. All rights reserved worldwide. A Look at a SIP Implementation 5 Unified Communications System The World PSTN Fixed Legacy Rates Maximum Capacity

7. © 2009 ShoreTel, Inc. All rights reserved worldwide. A Look at a SIP Implementation 6 Unified Communications System The World PSTN ITSP

8. © 2009 ShoreTel, Inc. All rights reserved worldwide. A Look at a SIP Implementation 7 Unified Communications System The World PSTN ITSP SIP Session Border Controller Variable Bandwidth Pay for Based on Real Usage No Limits on Your Point of Presence

9. © 2009 ShoreTel, Inc. All rights reserved worldwide. Burst Base Pricing Options No Distance Based Pricing Local Presence with Single Interface and Provider Leveraged the Network The Economic Advantages

10. © 2009 ShoreTel, Inc. All rights reserved worldwide. ROI of SIP and IP Communications SIP Reduce Services Cost Part of the Total Savings Picture

11. © 2009 ShoreTel, Inc. All rights reserved worldwide. Practical Considerations Network address translation ( NAT ) – NAT resides at L3/L4 – SIP at L7 – NAT processing “breaks” SIP addressing SIP Communication security – Physical medium is the IP pipe – Firewalls control what goes in or out such pipe SIP Protocol Compatibilities – Not all SIP are created equal … and compatible – Open Standard …open to interpretations

12. THANK YOU © 2007 ShoreTel, Inc. All rights reserved worldwide. The ShoreTel logo, ShoreTel, ShoreCare, ShoreGear, ShoreWare, and ControlPoint are registered trademarks of ShoreTel, Inc. in the United States and/or other countries. ShorePhone is a trademark of ShoreTel, Inc. in the United States and/or other countries. All other copyrights and trademarks herein are the property of their respective owners.