ATT LABS Research Development Introducing ATT Telepresence Interop

AT&T Telepresence Solutions 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 Page 2 Copyright © 2010 AT&T. All rights Reserved.

ATS T 3 Team - Member of TAG Certification Experience • First team in world to achieve first Cisco Telepresence Solutions Specialist (CTSS) Certification • 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. Page 3 Copyright © 2010 AT&T. All rights Reserved.

AT&T Telepresence Solutions - Features Fully managed inter-company Telepresence application over MPLS Encrypted multipoint Call support AT&T VPN transport Network assessment, design & implementation Concierge support & Scheduling Portal Configuration model options -Enterprise -Exchange Hosted - Gateway Connect AT&T Business Exchange Company A VPN Company B VPN Inter-company meet-me Telepresence connections Company C VPN AT&T Global MPLS Network Three-screen and one-screen options H 320 & H. 323 Endpoint support Proactive monitoring and management Page 44 30 fps Video sharing and Audio Add-in Support Copyright © 2010 AT&T. All rights Reserved.

ATS Video Center of Excellence New Jersey 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 Page 5 Copyright © 2010 AT&T. All rights Reserved.

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

Telepresence Interop Challenges- Features • Lack of an open Interoperability standard across multiple vendors. • All equipment use SIP, H 323 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 • • Page 7 Single button dialing & Audio/video add in. Copyright © 2010 AT&T. All rights Reserved.

Telepresence Interop Challenges-Network • Network fault tolerance very low • Strict policing at L 2 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 (H 323) prevents extended reach. • IPV 6 support Page 8 Copyright © 2010 AT&T. All rights Reserved.