Clarent Appoints Steven d'Alencon as Chief Marketing Officer; New Executive to Spearhead Global Rollout of Next Generation Intelligent Network Services.

Business Editors/High-Tech Writers

REDWOOD CITY, Calif.--(BUSINESS WIRE)--June 20, 2001

Clarent Corporation (Nasdaq:CLRN), a leading provider of softswitch and Internet Protocol (IP) communications solutions, today announced the appointment of Steven d'Alencon as senior vice president and chief marketing officer (CMO). D'Alencon is in charge of amplifying Clarent's leadership role in the telecommunications industry's migration from circuit-switched to packet-based networks. His responsibilities will include creating, implementing and overseeing Clarent's global strategic marketing and branding initiatives.

"We sought a dynamic business leader, one with extensive marketing, product and technical knowledge, combined with a proven track record of success. Steven is the clear choice to reinforce Clarent's leadership in global IP communications," said Barry Forman, president and executive chairman, Clarent Corporation. "Steven will play a vital role in expanding Clarent's visibility and market presence worldwide and his experience adds valuable depth to the executive management team."

"Clarent is leading the revolution in the migration of voice traffic and the introduction of new services to packet-based networks, delivering considerable value to customers," said Steven d'Alencon, chief marketing officer, Clarent Corporation. "Clarent has steadily built a global leadership position through the delivery of advanced solutions, rapid customer adoption and strong customer retention. I am excited to be a member of the team, taking Clarent to the next level."

D'Alencon joins Clarent with nearly two decades of computer software and Internet services experience. Most recently, he served as vice president of marketing and business development for Xoriant Corporation, a provider of eBusiness software products, integration and consulting services. There, he successfully re-branded and re-launched the company, rolling out programs to support both new and existing lines of business. Prior to Xoriant, d'Alencon served as senior vice president of marketing and business development for nCommand, an Application Service Provider (ASP) delivering hosted technology solutions for the mortgage banking community.

D'Alencon spent more than four years at Oracle Corporation, more recently as vice president of marketing, overseeing strategic and tactical marketing programs for Oracle's Application Server Division, in addition to other corporate marketing responsibilities. His experience also includes various management and technical marketing positions at Worldtalk, Premenos, Lotus Development Corporation and cc:Mail. D'Alencon studied electrical engineering and computer science at Drexel University.

About Clarent

Clarent Corporation (Nasdaq:CLRN) is a world leader in providing intelligent, software-driven products for new generation, IP-based communications networks. Clarent solutions enable interconnection among communications service providers' disparate networks and foster the creation of global footprints for more than 350 telecom service providers worldwide, including AT&T, NTT and China Telecom. Clarent's software platform and softswitch encourage innovation by allowing 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 www.clarent.com.

Forward Looking Statements

This release may contain forward-looking statements that involve risks and uncertainties, including statements relating to telecommunication industry development and Clarent's future growth and strategic goals. These statements involve risks and uncertainties, including potential issues relating to changes in market conditions, inability to introduce new products, ability to retain customers, government regulations, the international communications industry, 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.

Trademarks

Clarent, the Clarent logo, Clarent OpenAccess, NetPerformer, DynaStar, Clarent Command Center, Clarent ThroughPacket, Clarent CPG, Clarent OpenAccess, 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.