Clarent Corporation Supplies Phone to Phone Technology to Netherlands PTT; Market Trials Began April 1, 1999.

REDWOOD CITY, Calif.--(BUSINESS WIRE)--April 6, 1999--Clarent(TM) Corporation, the worldwide leader in carrier-grade, phone-to-phone IP telephony solutions, announced today that it is one of the suppliers of IP telephony technology to KPN Telecom Netherlands for KPN's first phone-to-phone IP telephony market trial.

The trials are set to begin on 1 April, 1999 and last until 1 June. The purpose of the trials is to test market price and voice quality for IP-telephony in the Dutch market.

"Clarent Corporation is delighted to be one of the suppliers to KPN Telecom Netherlands," said Chris Wyles, vice president of Clarent for Europe and managing director of European, Middle East and African Operations. "We have focused on the carrier market since we began shipping technology two years ago. We look forward to providing our carrier-focused technology to KPN Telecom Netherlands and to working closely with them on this important market test."

"As one of the leading vendors in IP telephony, Clarent has a clear, differentiated strategy to provide intelligent network-type feature sets on IP gateways," said Tom Valovic, analyst, International Data Corporation. "That kind of strategy is a distinct advantage in attracting major telcos like KPN Telecom."

About Clarent

Clarent Corporation is a privately held company and a premier provider of Internet telephony solutions offering clear voice, real-time fax, SS7/C7 integration, universal voice/fax/data ports and a host of other business-ready capabilities. Clarent Command Center provides billing and management for a very large network of Clarent Gateways.

All Clarent products are backed by a complete, robust, scalable network infrastructure, enabling network and enterprise customers to easily run their business communications on IP telephony. Founded in July 1996, Clarent is headquartered in Redwood City, and also has offices in Chicago, London, Brussels, Athens, Madrid, Nurnberg, Taipei, Tokyo, and Seoul. 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.