© 2008 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.

Kris Rinne, SVP Architecture & Planning

LTE: Towards Mobile Broadband

Emailer-in-Chief

Photo: ZDNet

Going Mobile with Data

Source: Nielsen Mobile

Mill

ions

Devices Primed For Embedded Wireless

PNDs• Real Time Traffic• Points of Interest• Web Search

Digital Cameras• Backup Photos• Limitless Memory Card

Media Player• Internet Radio

MID & UMPC• Web Browsing

Gaming Devices• Multiplayer Games• Access to game

downloads

Car• Diagnostics & Safety• Web Surfing• Real Time Traffic• Internet Radio

eReader• On the go access to books• Simple out of

the box experience

Picture Frame• Push photos to Grandma• No setup required

The Network

Page 4

Certifying New Non-Stock Devices

>300 Wireless Units Certified• 149 Wireless Devices• 11 Wireless Modules• 77 Laptops

The GSM Advantage

3.5 Billion Connections Worldwide219 Countries and Territories750 Mobile Operators

AT&T: HSPA/3G

• Best Network Coverage Worldwide. – ~350 markets with 3G today– AT&T can leverage EDGE fallback for nationwide data coverage– AT&T offers global roaming advantages

• Nation’s Fastest 3G Network– Downlink of 700-1700 Kbps, Uplink of 500-1200 Kbps

• Faster than Sprint and Verizon’s Evolution-Data Optimized (EV-DO Rev. A) Network

• Clear Path to Long Term Evolution (LTE)

Page 7

Peak Rates Over Time

DL R’99-384k

HSDPA 1.8M

HSDPA 3.6M

HSDPA 7.2M

HSDPA 14.4M

MIMO 2x2 28M

MIMO/64QAM 41M

DL LTE(10MHz) 140M

DL LTE(20MHz) 300M

100 kbps

1 Mbps

10 Mbps

20 Mbps

100 kbps

1 Mbps

10 Mbps

100 Mbps

2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

UL R’99 384k

HSUPA 1.5M

HSUPA 5.6M

HSUPA/16QAM 11M

UL LTE (10MHz) 25M

UL LTE (10MHz) 50M

• HSPA DL and UL peak throughputs expected to double every year on average

• Limitations not induced by the technology itself but time frames required to upgrade infrastructure and transport networks, obtain devices with corresponding capabilities and interoperability tests

Downlink Speeds

Uplink Speeds

Source: EDGE, HSPA and LTE, Broadband Innovation, Sep 2008, Rysavy Research, 3G Americas

Standards make a difference

Backwards Data Compatibility

A Global Commitment to LTE

LTE Targets

Source: Ericsson

Next-Generation IP Backbone Hubs

LALA

STTLSTTL

RLGHRLGH

CMBRCMBR

PHLAPHLA

ORLDORLD

CHCGCHCG

KSCYKSCY

SNDGSNDG

SFSF

PTLDPTLD

SANSANHSTNHSTN NWOR

STLSSTLS

SLKCSLKC

DCDC

ATLNATLN

NYNY

NSVLNSVL

CLEVCLEV

SCRMSCRM

DNVRDNVR

DLLSDLLSPHNXPHNX

IMS: IP Multimedia Subsystem The Platform Driving Convergence

Integrated Service Delivery Environment

AT&T’s CARTS: Common Architecture for Real Time Services

Voice MessagingConferencing Video Your App

AT&T CARTS Infrastructure

Global IP/MPLS Network

All Access Technologies

Any End Device

Other Apps

© 2007 AT&T Knowledge Ventures. All rights reserved.

AT&T CARTS Infrastructure Provides Advanced Services in a Uniform Environment

IMS Core +

Web ServicesE911 CALEA

Border Elements and Gateways

Conclusions

Questions?