DSET and Vitria Technology Integrate Solutions for Automating CLEC Business Processes

Bridgewater, NJ - February 9, 2000 - (NASDAQ: DSET) - DSET Corporation, a leading supplier of business-to-business e-commerce solutions for the telecom industry, today announced that it is jointly developing eBusiness solutions with Vitria Technology for automating processes for the exchange of data between DSET's electronic-bonding gateways and virtually any operations support system (OSS) deployed by competitive local exchange carriers (CLECs). DSET has assumed responsibility for the development of special interfaces to Vitria BusinessWare® software that will enable CLECs to conveniently implement flow-through automation of key business processes.

The new interfaces will facilitate the connection of any DSET gateway to the BusinessWare software, which in turn is designed for quick, cost-effective integration into a service provider's OSS environment to support operations such as ordering, billing and trouble management. Competitive providers will thus be able to take full advantage of the capabilities of DSET's gateways in combination with operations support systems from a wide range of suppliers without having to develop customized interfaces.

"We are pleased with the strategic decision that DSET has made in selecting BusinessWare as their preferred integration platform for eBusiness applications," said Adam J. Meyer, director of ISV alliances for Vitria. "The scope of their solutions, development efforts, and their commitment to our product is another excellent validation of both Vitria and DSET, as the eBusiness solution that is transforming the telecommunications industry."

Demonstrating the potential of the DSET and Vitria alliance, integration of the DSET ezTroubleAdmin gateway, Vitria BusinessWare, and the Clarify Inc. CommCenter solution is in progress at a major CLEC. DSET announced its alliance relationship with Clarify in September 1999.

The ezTroubleAdmin gateway automates the flow of trouble-ticket data between a CLEC's customer-care system, such as the Clarify CommCenter, and the trouble-administration OSS of the incumbent local exchange carriers (ILECs) or long-distance carriers with which the CLEC interconnects. Interconnection between ezTroubleAdmin and the Clarify CommCenter is conveniently achieved via Vitria BusinessWare. Automating the exchange of trouble-ticket data in this way expedites the resolution of problems that affect a CLEC's customers but which may be caused by a failure in the portions of a trading-partner's network leased by the CLEC.

"Our agreement with Vitria is key to DSET's strategy for making it as easy as is technically feasible for a CLEC to deploy our products," said Paul Smith, DSET's senior vice president of strategic planning and product management. "We anticipate that Vitria solutions for eBusiness will be basic components of the CLEC operations-support environment, and we plan to aggressively roll out Vitria interfaces for DSET's entire gateway line. This will enable fast, efficient implementation of any combination of DSET gateways and a CLEC's billing, customer-care, and order-management systems."

DSET gateway products automate the generation of sales quotes, the ordering of local loops and high-capacity circuits, as well as providing support for number portability, 911 emergency service, calling card, and caller ID services. DSET products also ensure that CLEC customers are served by their preferred long-distance carriers and that service problems are resolved quickly and efficiently.

About Vitria:

Vitria Technology, Inc. is a leading eBusiness platform provider. Vitria's eBusiness platform, BusinessWare, automates mission-critical business processes across the extended enterprise, reducing time to market, shortening lead times, lowering operating costs, and increasing customer satisfaction. Vitria is a publicly traded company (Nasdaq:VITR) based in Sunnyvale, California. For more information, call 408-212-2700, visit the company's Web site at www.vitria.com or send e-mail to info@vitria.com.

This press release includes forward-looking statements that are subject to risks, uncertainties and other factors that could cause actual results to differ materially from those referred to in the forward-looking statements. Such factors include, but are not limited to, risk as related to market acceptance of Vitria's product, deployment delays or errors associated with these products, hardware platform incompatibilities, reliance on a limited number of customers for a majority of revenue, need to maintain and enhance certain business relationships with system integrators and other parties, ability to manage growth, activities by Vitria and others regarding protection of proprietary information, release of competitive products and other actions by competitors, Year 2000 problems and economic downturns in either domestic or foreign markets. These forward-looking statements are generally identified by words such as "expect," "anticipate," "intend," "believe," "hope," "assume," "estimate" and other similar words and expressions.

About DSET:

DSET Corporation is a leading provider of business-to-business e-commerce solutions for the global telecommunications marketplace. The DSET suite of electronic-bonding gateways is designed to interconnect the operations support systems (OSSs) of service providers that must exchange information and share network capabilities with trading partners to provision and maintain a growing range of services for customers in the competitive telecom market. DSET's local number portability solutions play a key role in enabling business and residential customers to change service providers without changing their local phone numbers. DSET is headquartered in Bridgewater, New Jersey, and the company's Web site can be viewed at www.dset.com.

Statements regarding financial matters contained in this press release, other than historical facts, are forward-looking. Since all statements about DSET's plans, estimates, and expectations are based on current projections that involve risks and uncertainties, and are subject to change at any time, the company's actual results may differ materially from expected results. Investors should consider these risks and uncertainties, which are discussed in documents filed by DSET with the Securities and Exchange Commission. These documents identify important factors that could cause the actual results to differ materially from those contained in the projections or forward-looking statements. DSET expressly disclaims any obligation to update any forward-looking statements.

x x x

Vitria Contacts:

Alex Osadzinski, VP , Marketing, 408-212-2260,
e-mail: Alexo@vitria.com

Teddi Herman, Access Communications, 415-904-7070, e-mail: therman@accesspr.com

DSET Contacts:

Media Relations: Kathy Claxton, Corporate Marketing Communications Manager, 908-526-7500 Ext. 1280

Investor Relations: John P. Murphy, Westfield Investor Relations, 908-233-1558, e-mail: westfieldir@worldnet.att.net

DSET and the DSET logo are registered trademarks of DSET Corporation.

BusinessWare is a registered trademark of Vitria Technologies Inc.

Clarify is a registered trademark of Clarify Inc