DSET Utilizes Java™ for Gateways

Expands Use of BEA's WebLogic J2EE™ Development Platform

Bridgewater, NJ - February 8, 2001 - (Nasdaq: DSET) - DSET Corporation announced today that it is expanding the use of BEA Systems Inc.'s WebLogic Server™ to support the implementation of Java 2 Enterprise Edition technology (J2EE) from Sun Microsystems, Inc. as the development platform for its gateway products.

DSET has been using this development platform since early in 2000 and has already shipped its first J2EE-based gateway, ezPreOrder (Basic edition). This DSET product has now been deployed at multiple customer sites.

DSET selected the BEA solution because it is the leading J2EE software development environment optimized for Web-based application development. The benefits of BEA's WebLogic Server and J2EE to DSET, its customers, and investors include:

• Faster development of new functionality and new products because of the rich suite of pre-built capabilities in the J2EE platform.
• Easy integration with a wide range of other J2EE-based software solutions.
• Products that are easily scalable.
• Extensive development community support.

Together, these benefits result in lower product development costs that can contribute to increased profitability.

In addition to building gateways on the J2EE platform, DSET is incorporating XML technology in its software solutions. XML is emerging as a widely used communications interface in many industries. DSET is also tracking efforts such as the work on tML, a potential variation of XML that may prove to be the optimal interface standard for the telecommunications industry.

"Our engineering community is very excited about the move to J2EE," said Jimmy Jobe, DSET's senior vice president of product development and product management. "This migration is part of a multi-faceted effort that will enable us to dramatically accelerate the pace of gateway development and the introduction of new products offering increased functionality and business benefits. We are confident that as we continue to roll out gateways on this platform our customers will be extremely pleased with the added value that DSET products will deliver."

About DSET:

DSET Corporation is a leading supplier of software and services that enable telecommunications providers to implement electronic Trading Partner Networks, which significantly reduce the time required to provision services for customers and resolve service outages to maintain high service quality and ensure customer retention. 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.

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DSET Contacts:

Media Relations: Dean Maskevich, Marketing Communications, 908-526-7500 Ext. 1366,
e-mail: dmaskevi@dset.com

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.

BEA and WebLogic are registered trademarks of BEA Systems, Inc. BEA WebLogic Server is a trademark of BEA Systems, Inc.

Sun, Sun Microsystems, Java, and J2EE are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries.

All other trademarks are the property of their respective owners.