DSET Corporation's Nasdaq Trading Symbol Reverts to "DSET"

Bridgewater, NJ - September 20, 2001 - (Nasdaq: DSET) - DSET Corporation today announced that the company's Nasdaq trading symbol has reverted to "DSET" after the period following its August reverse stock split when the company was required to temporarily trade under "DSETD" to indicate that such a split had taken place.

About DSET Corporation

DSET Corporation is a leading supplier of electronic-bonding gateways and software solutions that automate the provisioning of Internet Protocol (IP)-based services. DSET gateways enable communications providers to implement electronic Trading Partner Networks (TPNs). A TPN plays a critical role in lowering the cost of acquiring customers, reducing the amount of time required to provision new phone services for customers, and minimizing the time required to resolve service outages to ensure higher customer satisfaction and less customer churn. DSET IP provisioning solutions facilitate the creation of virtual private networks (VPNs) and a variety of other services at a fraction of the cost and time of conventional provisioning methods. 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.

DSET Contacts

Financial: Bruce Crowell, Chief Financial Officer, 908-526-7500 Ext. 1775,
e-mail: bcrowell@dset.com

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