Copyright © 2010 AT&T. All rights Reserved. Sumit Kumar Introducing AT&T Telepresence Interop at IMTC AT&T LABS Research & Development June 14, 2010

AT&T Telepresence Solutions Copyright © 2010 AT&T. All rights Reserved. Page 2 Fully managed Telepresence Service Available today in 75 countries First to offer encrypted multipoint Telepresence meetings through Business Exchange. First to offer Intercompany Telepresence meetings enabling companies to collaborate with suppliers, customers and peers. First to offer Exchange based Telepresence Interop saving customers on their legacy VC investments

ATS T3 Team - Member of TAG Copyright © 2010 AT&T. All rights Reserved. Page 3 Certification First team in world to achieve first Cisco Telepresence Solutions Specialist (CTSS) Certification Experience Combined Industry experience of over 120 years. Innovation Collaborations with AT&T Research and Consumer to develop innovative products & services. Technology State of the Art Testing & Development facilities in Tampa, Middletown & Chicago.

AT&T Telepresence Solutions - Features Copyright © 2010 AT&T. All rights Reserved. Page 4 Fully managed inter-company Telepresence application over MPLS Three-screen and one-screen options AT&T VPN transport Concierge support & Scheduling Portal Inter-company meet-me Telepresence connections 30fps Video sharing and Audio Add-in Support Proactive monitoring and management Network assessment, design & implementation Configuration model options -Enterprise -Exchange Hosted - Gateway Connect AT&T Global MPLS Network Company B VPN Company C VPN Company A VPN AT&T Business Exchange H320 & H.323 Endpoint support Encrypted multipoint Call support

ATS Video Center of Excellence New Jersey Copyright © 2010 AT&T. All rights Reserved. Page 5 Central lab for testing and certification requirements. Equipped with video traffic and network artifact simulators Demo center (live or online) for customers that want to “try before they buy”, can be used for IMTC TAG testing on need basis. Joint testing with customer and collaboration with research team for new products and features for ATS

What’s our Interest in IMTC Copyright © 2010 AT&T. All rights Reserved. Page 6

Telepresence Interop Challenges- Features Lack of an open Interoperability standard across multiple vendors. All equipment use SIP, H323 and H.264 however there are proprietary elements that prevent smooth Interop. No Interop solution without using additional equipment to trans-code that adds delay and quality issues All feature parity not available even with trans-coding equipment: Encryption Presentation/data sharing capabilities Multi-Screen Support Single button dialing & Audio/video add in. Copyright © 2010 AT&T. All rights Reserved. Page 7

Network fault tolerance very low Strict policing at L2 devices Higher Jitter and Delay to span geographic distances High Out of sequence packets and low buffers in the MCUs. Lack of a central registration point for service providers. NAT non-compliance (H323) prevents extended reach. IPV6 support Copyright © 2010 AT&T. All rights Reserved. Page 8 Telepresence Interop Challenges-Network

Q&A AT&T Material Copyright © 2010 AT&T. All rights Reserved. Page 9