Missouri-Based Gabriel Communications Chooses DSET Solutions to Automate Pre-Order and Ordering Operations

Bridgewater, NJ - February 7, 2000 - (NASDAQ: DSET) - DSET Corporation, a leading supplier of business-to-business e-commerce solutions for the telecom industry, announced today that Gabriel Communications will deploy DSET solutions to automate key pre-order and ordering processes. The DSET products will facilitate electronic interconnection with Southwestern Bell and Ameritech for the growing integrated communications provider (ICP) headquartered in Missouri.

"As an ICP focused on the delivery of voice and data services using packet switching technology, Gabriel is building a unique position in the competitive telecom industry, and they've chosen DSET to help them achieve their objectives," said Phil Cavallo, DSET's senior vice president of sales and marketing. "One of the main reasons that Gabriel went with DSET is the neutral API that we maintain for all of our products, which facilitates integrating them into virtually any operations environment.

"Gabriel will be interfacing DSET solutions with its order management system, a combination conveniently facilitated by the openness of our systems' architecture. We're very pleased that after analyzing all of their needs Gabriel decided that DSET products would do the best job in meeting them."

About Gabriel Communications:

Gabriel Communications is a facilities-based integrated communications provider offering businesses and other end users the most advanced integrated communications products and services available, including local voice and data, domestic and international long distance and high-speed Internet access, web page hosting and domain name services. Gabriel packages dedicated high speed Internet access and "traditional" local and long distance telephone services with unified voice, e-mail and fax messaging and other advanced data services. Gabriel has networks in operation or under development in 14 markets in Missouri, Kansas, Oklahoma, Arkansas, Indiana, Ohio and Kentucky. A privately held company, Gabriel's headquarters are located at 16090 Swingley Ridge Road in Chesterfield, Missouri. Additional information about Gabriel is available at www.gabrielcom.net.

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 as 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.

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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.