DSET Announces ezPreOrder 1.2.1

New Version of Pre-order Gateway Offers Automated Receive Capability

Bridgewater, NJ - August 8, 2001 - (Nasdaq: DSET) - DSET Corporation today announced the shipment of a new version of its ezPreOrder electronic-bonding gateway. ezPreOrder 1.2.1 offers automated receive capability for incumbent carriers, along with a generic interface to facilitate interconnection between competitive service providers and the incumbents.

ezPreOrder, which has been deployed by multiple carriers, automates the first phase of transitioning customers to competitive providers from trading partners. The pre-order transactions performed determine service availability and support the correct completion of orders sent to trading partners, considerably reducing order turn-around intervals and operational costs. With the addition of receive capability, ezPreOrder can now be used by incumbent carriers to streamline the processing of inquiries sent to them by competitive providers.

ezPreOrder automates a wide range of pre-order functions in both send and receive modes, including the retrieval of customer service information (CSI) from incumbents, address validation, telephone-number reservation, and xDSL loop qualification. For a competitive provider, validating service addresses before sending orders to a trading partner eliminates a major cause of order rejection and costly reprocessing.

"The latest version of our ezPreOrder gateway expands the utility of this product for incumbent as well as competitive service providers, joining our LSR and ASR ordering solutions in offering both send and receive capability," said Michael McLaughlin, DSET's director of product management. "As ezPreOrder 1.2.1 shows, our vigorous product-development program is focused on giving all carriers the key electronic-bonding capabilities they need to operate successfully in the telecom environment that has emerged over the past year."

About DSET:

DSET is a leading supplier of software known as electronic-bonding gateways that enable competitive service providers in the telecommunications industry to implement an automated Trading Partner Network (TPN). A TPN plays a critical role in lowering the cost of acquiring customers, reducing the amount of time required to turn on services for new customers, and minimizing the time required to resolve service outages to ensure higher customer satisfaction and less customer turnover. DSET provides the installation, training, interoperability-testing, and maintenance services needed to put TPNs into production and maintain efficient operation. 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

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