BBN ANNOUNCES INDUSTRY'S FIRST VIDEO ROUTER FOR VIDEOCONFERENCING OVER
EXISTING INTERNET PROTOCOL NETWORKS

T/40 Router Reduces Videoconferencing Costs; Eliminates the Need for
Separate Networks

CAMBRIDGE, MA, August 14, 1995 -- BBN today announced its T/40 Video
Internet Router, the industry's first communications device that enables
companies to incorporate real-time video and Internet Protocol (IP) data
in a single router.

Routers connect dissimilar networks, forwarding information from one to
another and determining the best forwarding path to reach any destination.
The T/40 Router allows organizations to implement videoconferencing
systems over existing IP networks, such as those used for electronic mail
and other communications applications.

With the T/40, companies are able to reduce the high costs associated with
managing a separate videoconferencing network, as video and IP data share
one network. For example, a financial institution with worldwide branch
offices can add T/40 routers to their existing IP networks to establish
videoconferencing and real-time communication between branch offices and
corporate headquarters. While a videoconferencing session is in progress,
each branch office network remains available for routine IP traffic such
as printing documents, accessing server-based applications and sharing
files.

"Videoconferencing is an ideal tool to bring together geographically
dispersed teams to make timely, informed business decisions. However, high
costs and inconsistent transmission quality have made videoconferencing
impractical for many organizations," said Avi Legmann, product line
manager at BBN. "The T/40 Internet Router makes videoconferencing
affordable for organizations in a wide range of industries.
Videoconferencing systems can now run on the networks customers already
have in place without any reduction in transmission quality or added
network costs."

Reliable, Multisite Videoconferencing Multisite videoconferencing
capabilities are inherent in the T/40 Router. These capabilities are
supported through the ST-II resource management multi-cast protocol. ST-II
enforces efficient use of network bandwidth to allow real-time
applications to run on wide-area networks (WANs) and to provide
connectivity for multiple videoconferencing sites.

The T/40 packetizes real-time applications to run 'on top' of a Frame Relay
network. Real-time data is transmitted without interference, making the
T/40 suitable for other real-time applications, such as transaction
processing and imaging. Companies can install the T/40 to process standard
IP data as well as interoperate with existing networks.

T/40 Configuration The T/40 is based on proven technology that is being
used by BBN and its government customers to connect commercial desktop and
room-based videoconferencing systems into IP networks. The T/40 Router
supports industry standards and protocols including:

  Internet Protocol (IP)
  Internet-Control Message Protocol (ICMP)
  Point-to-Point Protocol (PPP)
  Simple Network Management Protocol (SNMP)
  Stream Version 2 (ST-II)

The T/40 Video Router is a hardware and software configuration that
includes a Motorola 68040-based processor, standard interfaces and modular
expansions. The product features IP and ST-II routing software with
resource management functions as well as application packetizing software
and BBN's serial protocol conversion technology.

Pricing and Availability The T/40 Video Internet Router will be available
in September 1995. Pricing for the modular product starts at $7,980.
Additional information may be obtained by calling 1-800-825-4730.

Headquartered in Cambridge, Massachusetts, BBN (Bolt Beranek and Newman
Inc., NYSE:BBN) is a leading provider of Internet access and
internetworked systems that help people work and learn together. For its
fiscal year ended June 30, 1995, BBN had revenue of $215 million.
 
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