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Kathleen Noonan, Clarent Corporation, +1 650-481-2511,
Melissa Urry, éclat MARKETING, +44 1628 400900,

Clarent to Demonstrate
Voice over IP Communications Services Via Cable Networks At Western Cable

Demonstration to Include Preview of Clarent Local Access Products and
Softswitch Technology

LOS ANGELES, Calif., November 31, 2000 * Clarent® Corporation (Nasdaq: CLRN)
(Booth No. 4134), a leading provider of Internet Protocol (IP)
communications solutions, today announced it is demonstrating the delivery
of packetized voice services based upon the CableLabs' PacketCable* set of
specifications at this week's Western Cable Show. PacketCable is a
CableLabs-led initiative aimed at developing interoperable interface
specifications for delivering advanced, real-time multimedia services over
two-way cable plant. The demonstration also will include a preview of
Clarent's local access products and softswitch technology, enabling both
on-net and off-net Voice over IP (VoIP) telecommunications services.

This presentation is part of the exclusive CableNET* exhibit, which is
co-sponsored by CableLabs and the California Cable Television Association,
and which showcases numerous innovative applications being developed for
broadband. Clarent's presence at the show* coupled with the demonstration of
its local access products* underscore the company's momentum toward
delivering a complete suite of market-ready local access products planned
for the first half of 2001.

"Most VoIP vendors are significantly behind in bringing a truly deployable
distributed softswitch technology to market, and this demonstration of
Clarent's PacketCable-based solutions reinforces our lead in the race to
bringing a feature-rich product suite to market," said Peter Bohacek, senior
vice president, product marketing for Clarent Corporation. "The forthcoming
delivery of our local access solutions are part of the company's overall
goal to redefine the way people communicate and conduct business by driving
unified convergence both over cable and telecom networks."

For the demonstration, phones will be connected to multimedia terminal
adapters (MTAs) * the equipment connecting cable networks with voice and
data networks * from Clarent, in addition to other equipment vendors.
Clarent products used in the demonstration include the Clarent Command
Center, Clarent Call Manager, Clarent Application Server, Clarent Gateway,
and Clarent MTA.

The 33rd annual Western Show will be held at the Los Angeles Convention
Center from November 28 through December 1.

About Clarent Corporation
Clarent Corporation (Nasdaq: CLRN) is a global market leader in providing
intelligent, software-driven products throughout IP-centric communications
networks, serving more than 300 telecom service providers worldwide such as
AT&T, NTT and China Telecom. Clarent solutions enable interconnection
between communications service providers' networks and foster the creation
of global footprints. In addition, Clarent's software platform allows
carriers to develop multiple new features for consumers and enterprises.
Founded in 1996, Clarent is headquartered in Redwood City, Calif. and has
offices in Asia, Europe, Latin America and North America. To learn more
about Clarent, visit its web site at

About PacketCable
PacketCable is a CableLabs-led initiative aimed at developing interoperable
interface specifications for delivering advanced, real-time multimedia
services over two-way cable plant. Built on top of the industry's highly
successful cable modem infrastructure, PacketCable networks will use
Internet protocol (IP) technology to enable a wide range of multimedia
services, such as IP telephony, multimedia conferencing, telecommuter
services, and other integrated multimedia applications.

# # #

Forward Looking Statements: This release contains forward-looking
statements, including statements about the demonstration of, future
development of and market availability of Clarent's local access products.
These statements involve risks and uncertainties, including risks associated
with the successful development, testing, and market introduction of
Clarent's local access products, in addition to potential issues relating to
interoperability, changes in market conditions, technological changes and
other factors, which could cause actual results to vary materially from
those expressed in or indicated by the forward-looking statements. These
risks and uncertainties are described further in the risk factors discussed
in Clarent's periodic filings with the SEC.

Clarent, the Clarent logo, NetPerformer, DynaStar, Clarent Command Center,
Clarent ThroughPacket, PowerCell, SkyPerformer, ACTview and ServiceXchange
are trademarks or registered trademarks, and "The Clearer. The Better" is a
service mark of Clarent Corporation in the United States and other
jurisdictions. All other trademarks, registered trademarks and service marks
are the property of their respective owners.

This press release was distributed by ResponseSource Press Release Wire on behalf of eclat Marketing in the following categories: Consumer Technology, Personal Finance, Business & Finance, Computing & Telecoms, for more information visit