2. January 23-26, 2007 Ft. Lauderdale, Florida Challenges in Deploying VoWLAN

3. January 23-26, 2007 Ft. Lauderdale, Florida Agenda Introduction Market Overview Challenges Solutions

4. January 23-26, 2007 Ft. Lauderdale, Florida Introduction to Global IP Sound Industry leaders of embedded media processing solutions –All products designed specifically for real-time communications on packet networks –11 patent applications filed; 7 officially granted, 4 in review –Industry standard designation by CableLabs and the IETF A team of media processing and IP telephony experts –Founded in Sweden in 1999 by Professor Bastiaan Kleijn and Dr. Roar Hagen –Well-seasoned senior management team located in San Francisco, CA –Approximately 70 employees with offices in Stockholm, San Francisco, Boston and Hong Kong

5. January 23-26, 2007 Ft. Lauderdale, Florida Market Overview

6. January 23-26, 2007 Ft. Lauderdale, Florida PCATAIP Phone Wi-Fi Phone All about the same product -- VOICE Expansion of VoIP Communications

7. January 23-26, 2007 Ft. Lauderdale, Florida Market Adoption Forecast The Promise of VoIP Beginning to Materialize Technology Trigger Peak of Inflated Expectations Trough of Disillusionment Slope of Enlightenment VoIP WiFi Location aware services Smart phones

8. January 23-26, 2007 Ft. Lauderdale, Florida Major Markets Residential Mobile Enterprise

9. January 23-26, 2007 Ft. Lauderdale, Florida Types of Networks Unplanned –Residential Engineered –Mobile –Enterprise

10. January 23-26, 2007 Ft. Lauderdale, Florida Market Segments

11. January 23-26, 2007 Ft. Lauderdale, Florida Challenges

12. January 23-26, 2007 Ft. Lauderdale, Florida Key Challenges Usability Devices Network

13. January 23-26, 2007 Ft. Lauderdale, Florida Usability Challenges Device registration Mobility

14. January 23-26, 2007 Ft. Lauderdale, Florida Device Challenges Size, cost, battery life Network compatibility Device intelligence 802.11 GSM CDMA 3G

15. January 23-26, 2007 Ft. Lauderdale, Florida Network Challenges Radio frequency attributes –Channel planning –Signal to noise ratio (SNR) Network capacity Mobility 0 1 2 3 4 5 6 7 8 9 10 11

16. January 23-26, 2007 Ft. Lauderdale, Florida Network Challenges WLAN (and Hotspots) –Long delay and significant jitter (up to 500 ms) –Packet loss up to 40% during congestion –Poor coverage results in poor link quality Challenges magnified in unplanned network scenarios

17. January 23-26, 2007 Ft. Lauderdale, Florida Solutions

18. January 23-26, 2007 Ft. Lauderdale, Florida Solutions 1500 bytes Data Packet 100 bytes Voice Packet Access point capacity is diminished by 15

19. January 23-26, 2007 Ft. Lauderdale, Florida Solutions IP Network < 150 ms for end user satisfaction Access point capacity is diminished by 15

20. January 23-26, 2007 Ft. Lauderdale, Florida Traditional Jitter Buffer & Error Concealment Techniques Sequential approach

21. January 23-26, 2007 Ft. Lauderdale, Florida GIPS IP Design Approach Non-sequential approach making the most of the available packets

22. January 23-26, 2007 Ft. Lauderdale, Florida High Resolution Adaptive Jitter Buffer ~ 30-80 ms savings, one way, compared to traditional jitter buffers Adaptive jitter bufferJitterFixed jitter buffer GIPS NetEQ™ Packet number 140 120 20 80 100 40 60 0 0200400600800100012001400160018002000 Delay (ms)

23. January 23-26, 2007 Ft. Lauderdale, Florida Adaptive Codecs Adapt bit rate and packet size to network conditions –Eg. iSAC 10-32 kbps or 30-60 ms packets –Provide higher density –Superior media processing over “real-life” networks

24. January 23-26, 2007 Ft. Lauderdale, Florida Conclusions Unmanaged networks will always have challenges –Solutions must be built on highest quality platforms to mitigate these Manage delay and packet loss at the edge of the network –WiFi Devices –Internet Access Points

25. January 23-26, 2007 Ft. Lauderdale, Florida Questions?