Clarent Announces Clarent ClearView For Large-Scale IP Telephony Networks.

ATLANTA--(BUSINESS WIRE)--Sept. 27, 1999--

Network Management Products Provide Enhanced JAVA(TM) Tools

For Managing and Controlling IP Telephony Networks

Clarent Corporation (Nasdaq:CLRN), a worldwide leader in providing carrier-grade, phone-to-phone IP telephony solutions, announced today Clarent ClearView, a suite of network management products for large-scale IP telephony networks.

These products represent the first Clarent products compliant with the Clarent Open Network Environment (ClarentONE) architecture also announced today.

Clarent ClearView is built on a Java-based client-server platform that is designed to work with the networks of Clarent's service provider customers. These products should permit communication over the IP network with Clarent Gateways and the Clarent Command Center and are intended to provide a significant advancement in the state-of-the-art management of VoIP networks.

In addition, the products are designed to offer a high degree of flexibility, greater granularity and increased control in managing a Clarent-based IP telephony network. They are also designed to permit both distributed access and centralized control. Clarent ClearView embeds and leverages the WebXpress application server technology from BEA Web Logic.

Clarent ClearView

The initial components slated for availability are:

Clarent Application Server -- designed to provide a secure and highly scalable foundation for Clarent network management solutions. By mediating information between web browsers and other parts of the Clarent system, the Clarent Application Server is designed to enable any web browser, anywhere in the world, to become a management console. The Clarent Application Server is based on SSL security and employs Pure Java(TM) and standard interfaces such as SNMP, JDBC and HTTP.

Clarent Package Distributor -- a Pure Java(TM) applet intended to allow network administrators to configure Clarent-based networks remotely with a web browser. With Clarent Package Distributor, a single administrator can initiate a change in configuration parameters for a large network of Clarent Gateways and Clarent Command Centers with a single mouse click.

Clarent Domain Controller -- a flexible, customizable web-based application designed to allow service providers to offer their end customers -- including enterprise and retail customers -- the ability to control their own subscriber, service, and billing information. With Clarent Domain Controller, service providers should be able to quickly create custom database views for each customer and increase service differentiation.

"With Clarent ClearView, Clarent now offers a significant step forward for IP telephony service providers: an open and flexible environment for the carriers' back office," said Mike Vargo, senior vice president and chief technology officer, Clarent Corporation. "These products give carriers the command and control they have been waiting for in managing their IP telephony networks."

The initial components of Clarent ClearView are intended be available in October 1999.

Forward Looking Statements

This release may contain forward-looking statements regarding Clarent's products, business, customers or other factors that may affect future earnings or financial results. Such statements involve risks and uncertainties, including but not limited to potential issues relating to product development, interoperability, inability to introduce new products, ability to retain key personnel, ability to retain key customers 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 the quarterly report filed with the Securities and Exchange Agreement on August 16, 1999.

About Clarent Corporation

Clarent Corporation is a premier provider of scaleable, IP telephony products to carriers and Internet service providers around the world. Clarent's intelligent architecture and the Clarent Command Center enable Clarent products to route, manage, inter-connect and terminate high volumes of calls for service provider customers including the world's largest long distance telecommunication companies. According to a Cape Saffron report published in 1999, more minutes travel across Clarent-enabled networks worldwide than those of any other equipment supplier.(a)

Founded in July 1996, Clarent is headquartered in Redwood City, California and has offices in major cities in Asia, Europe, Latin America and North America. Additional information about Clarent is available at http://www.clarent.com.

Note to Editors: Clarent is a registered trademark of Clarent Corporation in the United States and other jurisdictions. All other company or product names mentioned may be trademarks or registered trademarks of the respective companies with which they are associated.

BEA, TUXEDO, WebXpress and WebLogic are registered trademarks of BEA Systems, Inc.

(a)  Cape Saffron "Global IP Voice/ Fax Market 1999". Cape Saffron is
     a UK-based research group focused on the international voice
     market. http://www.capesaffron.com