AT T VPN Service January 16 2007 Alan Benway

Agenda • AT&T VPN Strategy • AT&T VPN Pricing Structure • AT&T VPN Features

AT&T VPN Strategy Integrated Management Client Visibility & Control m H pu os ti tin ng g & Se cu rit y Co Management Options ty ri cu & Se ng ti g pu in m ost Co H Services over IP Converged VPN LAN / IP Telephony Global Reach & Ubiquitous Access Remote Access Services Computing & Hosting External Gateways Security Adaptive Virtualization Integrated Services: A globally integrated IT fabric designed to meet clients’ reach, scale, reliability and security requirements Integrated Experience: Services enabled by integrated processes and tools that support end to end management, provide control and visibility Integrated Infrastructure: Worlds largest converged network, scaled global hosting environments, common systems and processes 3 Copyright © 2006 AT&T. All rights Reserved.

AT&T VPN Service Overview Customer Access AT&T VPN Firewall • Network-Based IP VPN Service enabled by Multiprotocol ATM The Internet FR Label Switching (MPLS) • Application awareness supported by Class of Service (Co. S) • Ability to link locations and transmit applications such as AT&T POP IP Voice, video, and data over a single network connection AT&T MPLS Network DSL Features & Benefits • Investment Protection-AT&T VPN is our strategic network service. Future AT&T feature and option enhancements will be on this platform • Meshed network for any-to-any communication with Class of Service for application prioritization • Application awareness allows you to prioritize traffic at every location and add locations with greater ease. • Scalability in adding locations to your network and the ability of handling thousands of sites • Our MPLS-based network architecture provides reliable, flexible, any-to-any connectivity • Security on par with Frame Relay • Built-in Disaster Recovery via MPLS • Variety of access options including Frame Relay, ATM, PPP, DSL, and in the future, Ethernet • Diversity Options for FR & ATM MPLS ports 4 • Unilink to support multiple private VPNs on a single connection • U. S. Multicast in Generally Available, Int’l in Controlled Introduction • Easy access to reporting and tools via a single web-portal and world-class customer support for your network and endusers • Industry-leading Service Level Agreements - network average SLA: Latency, Data Delivery, and Jitter. Site availability and Time to install SLA. • Award-winning AT&T Business. Direct™ portal access to servicing, trouble ticketing and reports Note: • GA in all U. S. Sites including HI, PR and USVI (excludes Alaska) • Available in 42 countries (Controlled introduction) Copyright © 2006 AT&T. All rights Reserved.

Price Structure Recurring Charges • Standard Charges • – Access charge (US -separate contract) – MPLS Port charge – Regional Port Surcharges (USVI, PR, HI) – • MPLS DSL Connection Activation charges (installation) – • For ports & Optional Features Miscellaneous Charges – Cancellation /Delay/Expedite Optional Feature Charges – COS package – Unilink – MPLS Port SDO – MPLS Port Po. P Diversity – 5 Non-Recurring Charges Reports Copyright © 2006 AT&T. All rights Reserved.

Class of Service AT&T VPN Service COS Packages 1. Multi-media High 2. Multi-media Low 3. Critical Data 4. Business Data Class I: Class III Class IV VOIP, Video SAP, Oracle Applications Web Traffic Email, FTP Router Sets Co. S MPLS Enabled Network Traffic Flow Provider Edge Router Reinforces Co. S Traffic at Ingress 6 Provider Edge Router Acts on Co. S Traffic at Egress Copyright © 2006 AT&T. All rights Reserved.

AT&T VPN Class of Service Structure AT&T VPN Model – Port, Logical Channel, Co. S option Co. S bandwidth allocation applied at Logical Channel level except for IP port applied at port level Co. S 1 Port Co. S 2 Logical Channel Co. S 3 Co. S 4 Frame Relay Model – Port, PVC bursting to port speed Port PVC 7 Copyright © 2006 AT&T. All rights Reserved.

AT&T VPN Multi-Link PPP US MLPPP Architecture 2 X T 1 to 8 x T 1 • Individual T 1 s bonded and behave as single access circuit • Available now in the US • MOW Nx. E 1/T 1 CI 2 H 07 8 Copyright © 2006 AT&T. All rights Reserved.

AT&T VPN MPLS DSL Connection Network Architecture - US NATIVE DSL AT&T ATM Switch DSL Provider ATM SWITCH x. ADSL ATU-R DSL Loop DSLAM DSL Provider network ATM PE VC MPLS Core • Digital Subscriber Line (DSL) technology provides broadband access services over traditional copper pair telephone wires. • MPLS DSL Connection provides a DSL access, MPLS port and logical channel to the VPN plus for IDSL & SDSL CPE & limited inside wire. • Industry leading large national DSL footprint available in more than 1300 cities • SDSL Speeds available 128 K, 256 K, 384 K, 768 K, 1. 0 M, 1. 5 M and IDSL 128 K • US ADSL CI capability planned 2 H 07 • MOW CI 2 H 07 9 Copyright © 2006 AT&T. All rights Reserved.

Unilink Feature Unilink is an optional feature that provides the ability to support multiple Logical Channels on a single MPLS port. MPLS Core AGN Internet VPN PER MPLS VPN A Core VPN B Internet AR Two VPNs Two Logical Channels One to each VPN With Unilink No Unilink CER MPLS Core AGN Internet VPN PER AR Two Logical Channels One to a VPN One to another FR/ATM Port CER With Unilink CER Unilink is supported on all FR & ATM MPLS ports • IP ports T 3 & above supported with FR encapsulation format only 10 PER AR Single Logical Channel • AGN Up to 12 Logical Channels (LC) • Customer selects LC bandwidth allocation • DSL ports only single logical channel/VPN • Copyright © 2006 AT&T. All rights Reserved.

AT&T VPN MPLS Diversity Options USA (excluding Alaska) Newark, NJ MPLS Port SDO (Service Diversity Option) Diversity (charge per port) (a. k. a. Switch Diversity) PE • Ports provisioned on diverse switches (for FR & ATM MPLS ports) or Provider Edge Router (PE) (for IP MPLS ports) within the same Switch POP PE Printer Miami, FL PE MPLS Port POP Diversity (charge per port) (a. k. a. Switch POP Diversity) • Ports provisioned on diverse switches/PE in diverse Switch POP’s PE Printer Tampa, FL 11 Copyright © 2006 AT&T. All rights Reserved.

Multicast (GA, CI in the US, Canada, EMEA & AP) PE Provider Network CE CE Per VPN MDT CE PE MDT – Multicast Distribution Tree CE – Customer Edge Router PE – Provider Edge Router PE CE • Multicast applications: Distance learning, video streaming, all-hands meeting, etc • Delivers to all PEs where VPN terminates. PEs decide whether to send it to the CEs • Multicast packets on IP MPLS ports supported in Co. S 4 only • No charge feature 12 Copyright © 2006 AT&T. All rights Reserved.

Ethernet Access to AVPN Services Ethernet Service Ethernet Access to AT&T VPN Provider MPLS GSR Gig. E Ehub MSP GE U. S. AVPN Ethernet Access Phase I (US CI 1 Q 07, MOW CI 2 H 07): • Type of access: – Total Service – ACCURing – UVN – Baseline (coming soon) • Physical Interface Speeds – 10 base. T, 100 base. FX, 1000 base. SX, 1000 base. LX • Access bandwidth – 5 M, 10 M, 20 M, 50 M, 100 M, 150 M, 300 M, 600 M, 1 G • AVPN port speed available to customer – For 10 M Prem device: 1 M to 10 M by + 1 M – For 100 M Prem device: 10 M to 100 M by 10 M – For 1 G Prem device: 100 M to 1000 M by +100 M, plus 150 Meg Ethernet 10 Mbps to 1 Gbps • VLAN Logical Channel Speeds available For 10 M Prem device: 1 M to 10 M by +1 meg – For 100 M Prem device: 10 M to 100 M by +10 M – For 1 G Prem device: 100 M to 1000 M by + 100 M increments, plus 150 M – • • • 13 MSP Redundancy options – Resiliency option for diverse homing Reporting – All standard reports should be delivered on a per VLAN basis Class of service – All standard C-COS profiles are supported on a per VLAN basis Unilink – Multiple VLANs can exist on the same physical interface, delivering Unilink over Ethernet US Multicast not available until phase 2 CI 1 Q 08 Copyright © 2006 AT&T. All rights Reserved.

AT&T VPN Usage Based Billing (4 Q 06 US CI) UBB Methodology • Access Router is polled every 5 minutes for total octets in and total octets out • All in and out samples (17, 280 data points) are ranked in ascending order • Discard top 5% (864 measurements) • Bill at the 95% level of usage which is the sustained usage for the month in Mbps • Example T 1 Burstable MPLS Port Speed 1. 5 M Burstable T 1 Billing Option • Provision full T 1 IP MPLS port Allow to burst Billed by Mbps • Pricing based upon level of Sustained Usage each month (5 levels) up to 1. 5 M MPLS IP Port up to 512 K up to 384 K up to 256 K up to 128 K Hi-Cap Flex Billing Option • Example on a OC 3 VPN Port w/ 50 M Commitment MPLS Port Speed 155 M 14 • Based upon Sustained Usage • Pay for Minimum Bandwidth Commitment + Incremental Usage Fee if any Allow to burst Billed by Mbps Minimum Bandwidth Commitment • Provision full speed IP MPLS port based on plan (Nx. T 1, T 3, OC 12) 50 M MPLS IP Port • More flexible than the Burstable billing option • Planned capability Ethernet Access (1 Q 07 CI): • Fast Ethernet (100 Mbps) • Gigabit Ethernet (1000 Mbps) Copyright © 2006 AT&T. All rights Reserved.

AVPN Global Reach Dec 2006 – 42 Countries and growing (Frame and ATM MPLS Ports Only; IP MPLS Ports targeted for 1 Q 07 CI) Europe Austria Belgium Bulgaria Czech Rep. Denmark Finland France Germany Greece Hungary Ireland Israel Italy Luxembourg Country Expansion 1 Q 07 • Croatia • Cyprus • Ecuador • Panama • Malaysia • Philippines • Thailand • Pakistan Netherlands Norway Poland Portugal Romania Russian Fed. Slovak Republic Slovenia South Africa Spain Sweden Switzerland Turkey United Kingdom via AGN Nodes 2 Q 07 • India • Mexico • Indonesia 3 Q 07 • China • Vietnam • Morocco • Saudi Arabia • Qatar • UAE Country Expansion via • Dominican Republic • El Salvador • Guatemala NNI 3 Q 07 • Honduras • Nicaragua • Costa Rica Asia/Pacific Australia Hong Kong Japan New Zealand South Korea Singapore Taiwan Country Expansion via I-LLE 3 Q 07 • Bahrain • Estonia • Kuwait • Latvia • Oman • Lithuania • Bolivia • Albania • Paraguay • Macedonia • Uruguay • Montenegro • Sri Lanka • Serbia • Curacao • Ukraine • Georgia • Uzbekistan Americas Argentina Brazil Canada Chile Colombia Peru Venezuela Country Expansion via DSE 3 Q 07 • Afghanistan • Malawi • Burkina-Faso • Mali • Chad • Nigeria • Congo (Rep) • Uganda • Congo (Dem Rep) • Zimbabwe • Gabon • Brunei • Guinea • Bangladesh • Iraq • Nepal • Ivory Coast • Kenya • Madagascar • Azerbaijan • Kazakhstan * All dates are targets and subject to change. AVPN Transport MOW is in Controlled Introduction. All opportunities must be reviewed and approved via the Controlled Introduction Process. 15 Copyright © 2006 AT&T. All rights Reserved.

E-Servicing Direction for AT&T VPNs Process Automation Ê Shorter Cycle Times & More Timely Information Back End Systems Front End Systems Make It Automatic Improved User Experience ; Easy to Use Web Interfaces Auto Auto – – – creation of orders / tickets design / test handoff to LEC return from LEC verification of completed work BDMap & e. Maintenance available now. e. Order planned 2 Q 07 for US 16 Copyright © 2006 AT&T. All rights Reserved.

Customer Reporting Network Reports • Orderable option for nominal fee • Provides layer 3 network performance reports Hourly views – • Per port views Accessible through Infovista via Business Direct Provide layer 2 CNMS reports for FR, ATM & DSL port types – Accessible through CNMS Global Backbone Performance Reporting (GPR) • aka VPN Health site (no charge) • Accessible through Business Direct • Monitors Network Average SLA • Provides additional statistics on the performance of the AT&T VPN Network 17 Copyright © 2006 AT&T. All rights Reserved.

AT&T VPN SLA Overview The information below is a summary of the AT&T VPN SLA program. Please refer to the AT&T VPN Service Guide/Description for specific SLA terms & conditions. On Time Provisioning • Meet promised due date • Applies to new site installs • Remedy - 100% MRC for site installs Performance SLA Metrics • Credit available for outages longer than a minute • Latency <37 ms <100 ms Data Delivery >99. 95% >99. 9% <1 ms (US example)* Applicable out to demarcation point • MPLS Port to Port Jitter Availability / Time to Restore AT&T Network (core) Escalating credits up up to 100% MRC Performance • Network level • MPLS Port to MPLS Port applicable out to demarcation point • Remedy percentage of the monthly recurring charge 18 * 48 contiguous US States, other target values apply for other geographies Copyright © 2006 AT&T. All rights Reserved.

Agility for your Enterprise Network AT&T VPN with Value-Added Services IPSec Customer Location Internet Mobile Worker DSL Remote Location Dial Mobile Worker Customer Location AT&T Network IPSec NB-FW MPLS VPN Or FR/ATM VPN GW Customer Location IPSEC/SSL The VPN Solution that fits your needs today and in the future. Performance Application Performance Management for your critical business applications. End-to -end performance management for network components, transport and applications. 19 Agility AT&T Transport and Access flexibility from Managed Internet Service to Private Line DSL Copper, Ethernet or Fiber. Remote Access options, e. g. broadband, cellular. Control AT&T Business. Direct ® provides you a customized view into your infrastructure, including service ticket management, reporting, billing, and more. Copyright © 2006 AT&T. All rights Reserved. Security AT&T IP Security Services offers for your security needs for IP networking from Personal Firewall to Network-Based Firewall and Intrusion Detection.

Customer Value Proposition AT&T VPN allows customers to easily grow and expand service as their business needs change, and move to a next generation platform that provides the following: • Any-to-any connectivity • Application awareness & Scalability • Flexible access options • High Level of security & reliability • Enhanced Customer Experience • Platform for the future 20 Copyright © 2006 AT&T. All rights Reserved.

Thank You! 21 Copyright © 2006 AT&T. All rights Reserved.

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AT&T VPN MPLS Port Types Frame Relay MPLS Ports • Frame Relay MPLS Ports are available in speeds of 56 k, fractional T 1 & E 1, T 1, E 3, T 3, and sub-rate T 3 port speeds and connect to AT&T’s FR Provider Edge (usually a Cisco Switch - MGX). ATM MPLS Ports • ATM MPLS Ports are available in speeds of T 1, E 1, Nx. T 1, E 3, T 3, OC 3, STM 1, and is connect to AT&T’s ATM Provider Edge (usually a Cisco Switch - MGX). • OC 3 and STM 1 ATM MPLS Ports are available outside the US only on a very limited basis and with longer installation intervals. IP MPLS Ports • aka Private Line Access to the IP Provider Edge Router (Usually a Cisco Router - GSR) • IP MPLS Ports are available in speeds of T 1, T 3, OC 3, STM 1, OC 12. Subrate ports speeds supported include: T 3 speeds at 5 M, 10 M, 15 M 20 M, 25 M, and 30 M and OC 3 and STM 1 speeds at 50 M, 75 M, 100 M , and for OC 12 and STM 4 speeds at 200 M, 300 M and 400 M. • Uses PPP for single VPN • Uses FR encapsulation for Unilink to provide connection to multiple VPNs • No MACD support to change to or from PPP to FR encapsulation at this time. MPLS DSL Access Connection - US • Allows a Customer Site to connect to the AT&T Network, bundled with a DSL access line • MPLS DSL Access Connections are available at speeds of 128 k, 256 k, 384 k, 768 k, 1000 k, 1500 k. • Includes AT&T DSL Modem (either a DSL DSU or a DSL Router), initial configuration & limited inside wiring Ethernet MPLS Ports (CI 1 Q 07) • 1 M, 2 M, 3 M, 4 M, 5 M, 6 M, 7 M, 8 M, 9 M, 10 M, 20 M, 30 M, 40 M, 50 M, 60 M, 70 M, 80 M, 90 M, 100 M, 150 M, 200 M, 300 M, 400 M, 500 M, 600 M, 700 M, 800 M, 900 M, 1 G 23 Copyright © 2006 AT&T. All rights Reserved.

MPLS Network Convergence ATT VPN CE Private VPN Route Reflector FR/ATM Network Internet Route Reflector PE ATT-VPN IPe. FR EVPN CE FR/ATM Network OC-12 ATT-VPN CE ATT-VPN OC-192 IGR (Internet Route-free) MPLS CORE Scalability through common MPLS core with OC 192 trunks The Internet OC-48 IGR PE Core Router CE PE Public VPN Route Reflector Privacy through logical and physical separation 24 AT&T VPN OC-48 CE MIS PE OC-48 PNT Copyright © 2006 AT&T. All rights Reserved. PNT PE MIS

Co. S Package Summary Co. S Packages are optional features ($) Classes Available Co. S Package Co. S 1 Co. S 2 Co. S 3 Co. S 4 Multi. Media High Critical Data Profiles Number(s) Available Classes Available Co. S Package 1 through 24 Multi. Media Low 18 through 24 Co. S 1 Co. S 2 Co. S 3 Co. S 4 Co. S 3 Business Data Co. S 4 Bandwidth Allocation (%) Profile Number 1 2 3 4 5 6 7 8 9 10 11 12 90 80 80 80 60 60 60 50 40 40 40 20 Co. S 2 Co. S 3 Co. S 4 0 80 60 40 80 0 10 30 30 10 10 30 10 Profile Number 22 through 24 Total Bandwidth Co. S 1 13 14 15 16 17 18 19 20 21 22 23 24 Profile 25 equals “No Co. S” Note: COS 2, 3, 4 divide remaining BW after COS 1 allocation 25 9 through 24 Bandwidth Allocation (%) Total Bandwidth Co. S 1 Profiles Number(s) Available Copyright © 2006 AT&T. All rights Reserved. 20 20 10 10 10 0 0 0 Co. S 2 Co. S 3 Co. S 4 60 40 80 60 40 100 80 60 40 0 30 30 10 30 30 50 90 10 30 10 10 30 50 10 0

Reporting Reports (available via Business Direct portal) • Standard Global Performance Reporting (Backbone) • Optional Network reports (requires order & nominal charge/port/month) – FR/ATM MPLS Ports • Logical Channel Throughput by hour (Ingress/Egress, %Packets Exceeding Avg, % Packets Discarded) • Co. S by LC by hour (Ingress/Egress, %Packets Exceeding Avg, % Packets Discarded) • Configuration Report – IP MPLS PPP Ports • Port Throughput by hour (Ingress/Egress) • Summary Report • Co. S Throughput by hour (Egress) • Configuration Report – IP MPLS FR encap Ports • • 26 Port Throughput by hour (Ingress/Egress) Logical Channel Throughput by hour (Ingress/Egress) Copyright © 2006 AT&T. All rights Reserved.