Avistar Awarded the 2006 Lotus Advisor Editors' Choice Award; Video Collaboration Innovator Brings Visual Communications to IBM Workplace Managed Client.

REDWOOD SHORES, Calif. -- Avistar Communications Corp. (NASDAQ: AVSR), a desktop video collaboration platform provider, today announced that it has been awarded the 2006 Lotus Advisor Editors' Choice Award in the Collaboration: Virtual Meeting category.

Avistar was recognized for the integration of its comprehensive suite of desktop video applications with IBM Workplace Managed Client(TM), as demonstrated at Lotusphere 2006. Avistar's video platform, powered by its AvistarVOS(TM) software, brings the power of visual communications to IBM's collaboration platform, enabling users to initiate video calls in the context of applications such as calendaring, e-mail, documents, and instant contacts. Avistar also demonstrated a prototype integration that extends the capabilities of IBM Workplace Collaboration Services and Workplace Managed Client to allow users to connect by video with web conferencing presenters and participants.

"The editors of Lotus Advisor Magazine are pleased to acknowledge the notable achievement of Avistar Communications Corporation with a 2006 Lotus Advisor Editors' Choice Award," said Elizabeth Novak, Managing Editor, Lotus Advisor Magazine. "The Award recognizes Avistar's ability to help users communicate 'face-to-face' with partners, customers or remote workers while saving time and travel costs. Avistar lets companies integrate video communications into their daily workflow, resulting in improved productivity and stronger work relationships, without requiring a great deal of bandwidth or set-up time."

Avistar's integration with Workplace Managed Client enables colleagues to interact in one-to-one or through multi-party video calls, initiate and participate in company-wide interactive broadcast presentations, share data live and record content for later distribution using the web or via e-mail. Avistar's additional, prototype integration creates an embedded video window within a Workplace Managed Client web conferencing user interface so that conference participants can simultaneously view presenters and meeting material to heighten the communication experience.

The heightened understanding and convenience afforded by Avistar video interactivity are particularly critical for global businesses whose challenges include managing outsourced partners and distributed workers, pandemic conditions, weather-related disasters and other unforeseen events that threaten to disrupt daily workflow.

"Our high-impact video solution provides Workplace Managed Client users with a dynamic and practical way of collaborating at the desktop with maximum clarity and efficacy," said Gerald J. Burnett, chairman and CEO of Avistar. "Using this integration, workers can interact visually and immediately across miles and time zones, overcoming barriers to conducting business effectively in a fluid, global environment."

The 2006 Lotus Advisor Editors' Choice Award recognizes useful and innovative products that help Lotus developers, administrators and users do their jobs more easily and efficiently. The competition among exhibitors of collaboration/virtual meeting technology took place at Lotusphere 2006 in January and was judged by a panel consisting of Lotus Advisor technical editors, industry analysts and other experts in the various fields they judged.

About Avistar Communications Corporation

Avistar Communications Corporation develops, markets, and supports a video collaboration platform for the enterprise, all powered by the AvistarVOS(TM) software. From the desktop, Avistar delivers business-quality video calling, recording, publishing to web and e-mails, video-on-demand, broadcast origination and distribution, and document sharing. Avistar video-enables business processes by integrating visual communications into the daily workflow and connecting communities of users within and across enterprises. Founded in 1993, Avistar is headquartered in Redwood Shores, California, with sales offices in New York and London. Avistar's technology is used in more than 35 countries.

Collaboration Properties, Inc. (CPI), a wholly owned subsidiary of Avistar, holds a current portfolio of 70 patents for inventions in the primary areas of video and network technology. CPI pursues patents for presence-based interactions, desktop video, recorded and live media at the desktop, multimedia documents, data sharing, and a rich-service network video architecture to support Avistar's product suite and customers. CPI offers licenses to its patent portfolio and Avistar's video-enabling technologies to companies in the video conferencing, rich-media services, public networking, and related industries.

For more information, visit www.avistar.com.

Copyright (c) 2006 Avistar Communications Corporation. All rights reserved. Avistar, AvistarVOS, and the Avistar logo are trademarks or registered trademarks of Avistar Communications Corporation. IBM, Lotusphere, Workplace and Workplace Managed Client are trademarks of International Business Machines Corporations in the United States, other companies or both. Other company, product or service names may be trademarks or service marks of others.