1 Wireless and Messaging Systems – Network Infrastructure and Evolution

2 New Modes of Communication  messaging & attachments t Worldwide event t Eliminates time and space  messaging & attachments t Worldwide event t Eliminates time and space   Instant messaging t t On-line buddy lists   Instant messaging t t On-line buddy lists

3 Increasing Functionality of Service Packages Increasing Complexity of Offering Service Wireless Data Market Landscape ExtensionofDesktopExtensionofDesktop Business applications Query Messaging Filtered Simple messaging m-commerce Interactive Alerts Alphanumeric Voice paging Numeric Acknowledgment Broadcast File transfers Data intensive applications Web graphics & attachments

4 Paging (FLEX) Increasing Functionality of Service Packages Increasing Complexity of Offering Service The Players Packet Data (e.g. Cingular GPRS, Edge) Packet Data (e.g. Cingular GPRS, Edge) Interactive Packet Data (Cingular Interactive- Mobitex) Packet Data (Cingular Interactive- Mobitex) Interactive Cellular (SMS & WAP) & Paging (ReFLEX) Cellular (SMS & WAP) & Paging (ReFLEX)

5 Interactive Market Space - End User Needs  Key functionalities t Communicate interactively t Access to dynamic info on demand t “Alert function” t Perform applications  Small devices

6 Wireless and Messaging - End User Needs  Key functionalities t Access to enterprise and personal messaging systems t Consolidate to one address t Store and Forward and Interactive t “Alert function” t Filtering t Security  Network Coverage  Small devices  Long Battery Life

7 Cingular Interactive Mobitex Network Performance  High Availability  High Reliability  Low Latency  KEY Features e.g. t Long Battery Life t Nationwide seamless & automatic roaming  High Availability  High Reliability  Low Latency  KEY Features e.g. t Long Battery Life t Nationwide seamless & automatic roaming

8 View of the World Today TDMA Cingular TDMA Cingular ReFLEX SkyTel ReFLEX SkyTel iDEN Nextel iDEN Nextel CDMA Verizon, Sprint PCS CDMA Verizon, Sprint PCS GSM VoiceStream, Cingular GSM VoiceStream, Cingular RdLAP MDC 4800 Motient RdLAP MDC 4800 Motient Mobitex Cingular Interactive Mobitex Cingular Interactive

9 Wideband CDMA Wideband CDMA CDMA 2000 “3XRTT” CDMA 2000 “3XRTT” 3 rd Generation Evolution of Technology Analog 1 st Generation GPRS 1XRTT EDGE 2+G2+G 2+G2+G TDMA GSM 2 nd Generation CDMA

10 Wideband CDMA Wideband CDMA CDMA 2000 “3XRTT” CDMA 2000 “3XRTT” 3 rd Generation Cingular Wireless Analog 1 st Generation GPRS 1XRTT EDGE 2+G2+G 2+G2+G TDMA GSM 2 nd Generation CDMA

11 Technology Evolution Timelime   TDMA t t Circuit Sw Data: t t EDGE Compact t t VoIP EDGE (Compact)   GSM t t Circuit Sw Data t t GPRS t t EDGE Classic t t VoIP EDGE t t W’band CDMA 3   CDMA t t Circuit Sw Data t t Packet Data (1XRTT) t t Packet Data (HDR/3XRTT) 9.6 kbps kbps kbps <75 kbps 2 9.6/14.4 kbps kbps 160 kbps 600 kbps kbps 600 kbps 9.6/14.4 kbps 100 kbps 1 Assumes handsets are available in commercial quantity and networks are deployed with “reasonable” coverage. Limited deployments will occur sooner. 2 On an EDGE Compact channel, data throughput will decrease somewhat because of increased interference. 3 Additional Spectrum required

12 Interface Environment WCDMA GPRS, Edge Mobitex GSM, TDMA Businesses managing Employees Customers Consumers managing their profiles Cingular Customer Interface Environment   Customization & personalization   E-business infrastructure   Customization & personalization   E-business infrastructure

13 Summary  Market trends t Messaging is here – and instant l Business & consumers have different needs t Key requirements l Network coverage, latency, battery life protocol t Initial applications are of high value  Technology t Networks are here and paths set t It’s about customization and personalization l Multiple networks, message systems, devices and the infrastructure to support them  Market trends t Messaging is here – and instant l Business & consumers have different needs t Key requirements l Network coverage, latency, battery life protocol t Initial applications are of high value  Technology t Networks are here and paths set t It’s about customization and personalization l Multiple networks, message systems, devices and the infrastructure to support them