1. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Migrating from TDM to IP Brough Turner SVP and CTO NMS Communications

2. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 2 100% 0% Typical Adoption Curve Consumer VoIP IP-PBX TV in US– 6 yrs (‘52 - ’58) Digital COs in US 12 yrs (‘79 - ’91) Mobile users - Europe Mobile users - Global Camera Phones

3. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 3 (millions) Landline Subs Mobile Subs Source: ITU World Telecommunications Indicator Database 2002 The Kelsey Group 2002 Big Growth in Wireless Subscriber growth Real competition Multimedia, video, data New applications & services

4. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 4 New Service Model Service delivery systems decomposed into functional elements Autonomous modules interconnected with open, IP-based protocols Softswitch or SIP or TDM service delivery platform Same “Internet” design philosophy Open development shifting: From PC buses and PC operating systems to IP/ Ethernet and standard protocols

5. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 5 Media Service Platform Media Server Subsystem IP PSTN Application Server Media Gateway Signaling Gateway Media Storage and Content Media Engine Call Control Element Sample CCE RTP SIP CCXML VXML RTSP MRCP HTTP

6. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 6 IP-Based Platforms Independently scalable service elements interconnected by redundant IP networks Lowest cost, best fit to diverse applications Easily adapted to diverse applications Voice, video, data and messaging services Minimum time-to-market, minimum cost Flexible solution for IP-based applications or legacy applications on IP and legacy networks

8. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 8 Extra slides

9. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 9 Consumer VoIP Yahoo Broadband VoIP services taking off in Japan Vonage, SIPphone, Free World Dialup, Skype, … In US: AT&T, Verizon, MCI, and BellSouth offering VoIP services or making consumer VoIP announcements Infrastructure Voice Service Data Service Value-Added Services Traditional Telecom ModelNew Model Infrastructure Voice BB Data Service Value-Added Services IM

10. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 10 Ad Hoc Conferences Instant conference — no reservation required One-click web interface; one-button phone interface a.k.a. “Virtual Bridge” in softswitch / IP-PBXs Conferencing inherently available with every call Push-to-talk services Groups = inherent conferences Instant messengers New paradigm…

11. August 3-4, 2004 San Jose, CA www.voipdeveloper.com Slide 11 IM Telephony Presence — you know who’s available AOL, MSN, ICQ & Yahoo all adding audio and video to Instant Messengers Skype providing VoIP telephony with an IM interface and voice conferencing