1. August 2004 Developing Hosted IP PBX Applications Bob Minai

2. 2 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Market Landscape Thirty years of PBX domination PBXs offered more features and management control than legacy Centrex Centrex success mostly limited to price-conscious small businesses, governments and universities Network IP telephony taking off Hosted PBX solutions offer same services & mgmt control as IP PBX Most Centrex providers evaluating or deploying IP telephony Numerous carrier deployments underway, including incumbents

3. 3 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Enterprise Sites Like IP PBX IP-based software model Rich PBX + multimedia functions Web-based control, MACs Hosted PBX Offers the Best of Both Worlds Consistent Global Service Delivery Like Centrex Scale, reliability Purchase incrementally Centralized control, mgmt. Hosted PBX Open, standards-based Best of both worlds

4. 4 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Hosted PBX to Surpass IP PBX Source: IDC Stations & Revenue Forecasts for CPE IP-PBX v. Hosted PBX in the US Market

5. 5 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Example Carriers with IP Voice Deployed Competitive CarriersIncumbent Carriers

6. 6 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Building the Value Proposition A rapidly growing and globally diverse group of developers are building Hosted PBX applications Independent software vendors Communication service providers System integrators Developer’s Value Proposition Open, standards-based design encourages solution integration Opportunity to complement existing platform solutions for Hosted PBX, IP Centrex, Consumer Broadband Existing sales channels provide opportunity for instant exposure Service Provider Value Prop Wide range of applications to market to consumers, enterprises, verticals Accelerated service creation & delivery to serve specialized needs Bundling best-of-breed solutions New revenue, higher profitability Increased customer loyalty

7. 7 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Serving Specialized Customer Needs Developers can augment Hosted PBX functionality to serve specialized customer needs by leveraging specific expertise Market segments Practice areas Technologies Market Segments Customer Size, Industry Group, Language, etc… Technologies Wireless, Messaging, Presence, etc… Practice Areas Sales & Mktg, Customer Support, Supply Chain, etc… Specialized applications to enhance customer value

8. 8 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Open Client Architecture Open Client Inteface Open, XML Client Interface to Client Applications –Call Control Functions –Provisioning Functions Supports multiple apps from different vendors Streamlined development and deployment Applications not required to be hosted on separate servers Central platform handles provisioning, authentication, back-office integration, and redundancy Developers able to focus on core expertise Hosted PBX Platform Open Client Server Call Control Open Client Interface Third Party Clients Provisioning

9. 9 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Leveraging Call Control & Provisioning Open, XML-based interfaces enable developers to leverage capabilities of existing Hosted PBX platforms Call Control Functions –Dial, transfer, hold, talk, conference, release, etc. –Monitor users’ hook status (busy, idle, do not disturb) Services –Call clients –Attendant console, a.k.a receptionist console –Call center integration Provisioning Functions –Access to users’ directories and call logs –User and service configuration Services –OAMP Integration –Service Activation –Custom Web Portals

10. 10 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Market Trends Example Application Development

11. 11 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Application Integration DSLi’s VOX 3 offering integrates telephony with other useful applications Calendar Address Book E-Mail Instant Messaging Task List Stock Portfolio VOX 3 “Call Control” screen customized for residential use Remote Office Do Not Disturb Call Forwarding Click-to-Dial Call Log Multi-language support on-the-fly

12. 12 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Business Process Integration for Verticals Integrate with business process applications Billing Management Client management Record keeping Build value proposition Improves productivity Reduces costs Streamlines operations Other vertical markets Consulting Travel Financial Health Care BullDog TeleWorks has integrated telephony services with business process applications for small & mid-sized law firms

13. 13 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Carbon Twelve’s miReception AC Provides benefits that customers are willing to pay for Ergonomic work flow Desktop integration (MS Outlook, IM) Access to enterprise directories (LDAP) Integrated Messaging (Email, SMS, IM) Web-Based Attendant Console

14. 14 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute MS Outlook Plug-In Carbon Twelve’s miPA Lite Remote Office Do Not Disturb Call Forwarding Dialer Call Log MS Messenger Also plugs into MS Internet Explorer

15. 15 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute MS Internet Explorer Plug-In Highlight any phone number, right click and select dial

16. 16 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Family Receptionist Dashboard (Mock-Up) Main number Dad’s home office Annie’s teen line Tom’s Nextel mobile # Key 1 2 3 4 5 301-555-1001 301-555-1002 301-555-1003 301-555-1004 NameNumber Status Browse Default Greeting Personal Greeting Browse for new greeting Local & Toll Free Domestic LD International LD Toll Calls Receive Collect Calls XXX Ring all home numbers simultaneously Handle call with Family Receptionist Ring main number directly Advanced Configuration Johnson Family Receptionist Feature Codes Auth. Codes Call Intercept Caller ID Feature Codes Auth. Codes Call Intercept Caller ID Restriction M-F 4-8pm Drop-down box includes numbers assigned as home lines. Customer can restrict outgoing & incoming call types for these numbers Also provide option to enter PSTN numbers for routing. Potentially could offer capability to configure other numbers via portal, e.g. cell phones. Drop-down box includes numbers assigned as home lines. Customer can restrict outgoing & incoming call types for these numbers Also provide option to enter PSTN numbers for routing. Potentially could offer capability to configure other numbers via portal, e.g. cell phones. Browse Music on Hold Opportunity to sell Music on Hold tunes.

17. 17 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Voice Dialing Application Platform uses SIP to handoff calls – Calls routed to third-party application – Third-party server processes call, provides service – Third-party server can also use Open Client Server (OCS) interface Example: SIP-based speech recognition auto attendant – Platform routes calls to external application – External application (1) Retrieves company directory using OCS (2) Provides voice-based auto attendant service (3) Routes call back through BroadWorks OCS Retrieve Group Directory 3 RD Party SIP Application Server SIP Call routed to External App Call Initiated SIP Transfer Call

18. 18 ©2003 BroadSoft ®, Inc. Proprietary and Confidential; Do Not Copy, Duplicate, or Distribute Sample Possibilities CRM Integration Dial from directory Access directory for caller identity and account access VoIP Soft Client Call control via Hosted PBX platform Switch between voice and video calls Hospitality Applications Automatic Wake-Up, Do Not Disturb Check-In, Check-Out Lotus Sametime Dial from contacts Access contacts for caller identity Windows Messenger Dial from buddy list Escalate instant messaging session to voice / video call