2. Building Applications with SIP Conferencing / Collaboration Alan D. Percy Director, Market Development AudioCodes

3. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 3 Agenda Architecture Overview Typical Conferencing Applications Call Flow Examples Example - Pactolus Q/A

4. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 4 The Legacy Conferencing Solution Legacy TDM PBX T1/E1 PST N IVR Bridge Recording Web Server Interne t CTI

5. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 5 Application API Device Driver T1 Interface Hardware API Device Driver Media Resource Hardware PSTN H.100 Proprietary Closed Architecture Proprietary APIs and device drivers Legacy CTI Architecture

6. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 6 Bondage of Legacy Architecture Legacy Architecture limits you as a developer/designer. Requires specialized knowledge Limits choice of operating systems Limits form-factors Hard to Scale Difficult to upgrade or repair Slow to make changes API

7. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 7 Service Execution Environment SIP Protocol Stack Media Gateway Resource Media Server Resource LAN SIP PSTN Application Distributed architecture of IP based applications in standard servers controlling resources via SIP The SIP Architecture

8. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 8 Advantages of the SIP Architecture Industry Standard Interfaces –SIP (RFC 3261), NetAnn (RFC 4240) and MSCML (RFC 4722) Operating System and Platform Independent –Now you choose your operating system Broad Packaging Options –Boards, blades or boxes Better Scaling –Same solution for a wide range of solutions Reliability –Ability to route around failed equipment Agility –Enables quick application migration

9. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 9 SIP Architecture in Action Let’s take a look at the SIP Architecture when applied to Conferencing / Collaboration Applications

10. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 10 Architecture: IP Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server Interne t

11. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 11 The Application Server Conference Manager IVR SIP Proxy / Server Ops SIP Protocol Stack Software Modules Web GUI Manager TCP/IP

12. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 12 Call Flow Example Dial-in Conferencing

13. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 13 Dial-in Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server Call Setup INVITE Incoming Call Set-up

14. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 14 Dial-in Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server INVITE 200 Ok RTP Establish RTP to a media server

15. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 15 Dial-in Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server INFO MSCML Play/Collect RTP “Please enter your conference ID.” Play announcement and collect digits INFO DTMF=“1234”

16. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 16 Dial-in Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server INVITE MSCML Configure Conference RTP Create the conference

17. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 17 Dial-in Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server RTP Process is repeated for additional callers, adding each to the conference Support for various conference modes and cascading

18. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 18 Dial-in Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server RTP INVITE RTP Operator is added to the conference INFO DTMF=“*0” INVITE

19. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 19 Dial-in Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server RTP INFO DTMF=“*5” HTTP Server INFO MSCML Record User requests to record the conference

20. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 20 Call Flow Example Web Conferencing

21. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 21 Web Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server Interne t RTP G.711

22. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 22 Web Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server Interne t RTP Web-based caller using SIP softphone wants to join INVITE G.711 INVITE

23. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 23 Web Conferencing Conferencing Application Server Operator Phone T1/T3 Media Gateway PST N Media Server Interne t RTP Application adds user to conference, using multiple voice coders on bridge 200 Ok Coder=iLBC iLBC RTP Transcoding and conferencing G.711 200 Ok

24. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 24 Service Execution Environment SIP Protocol Stack Session Border Controller Media Server Resource SIP SIP Carrier Application When connecting to SIP carrier, Session Border Controller provides security and interoperability insulation. What about SIP Carriers? NEW LAN

25. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 25 Advantages of SIP Conferencing Greater Flexibility –Supports both TDM and Web callers Easier to Scale –Adding media gateways and media servers –Greater densities leverage economies of scale More Reliable –Distributed systems route around failures –Redundant gateways and servers Faster ROI –Doesn’t depend on expensive switch / PBX No Proprietary API Development

26. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 26 Example Lets take a look a real world example…..

27. January 23-25, 2008 Miami Beach Convention Center Miami, Florida USA www.ITEXPO.com 27 For more information, whitepapers, copies of the presentation slides or to view previously archived webinars, go to: www.audiocodes.com/breakfree