ConnectSouth Communications Selects DSET Solution for DSL Service

DSET Gateway Will Support Ordering and DSL Line Sharing for Texas-based DLEC

Bridgewater, NJ - June 21, 2000 - (NASDAQ: DSET) - DSET Corporation, a leading supplier of business-to-business e-commerce connectivity solutions for the telecom industry, announced today that ConnectSouth Communications is deploying DSET's ezLocal ordering gateway in a comprehensive operations support system (OSS) architecture designed to automate the process of providing digital subscriber line (DSL) service. ConnectSouth provides high-speed Internet access and Internet business tools to small- to medium-sized businesses in under-served communities across the Southern U.S.

The DSET ezLocal gateway is a key OSS interconnection solution that can automate the exchange of ordering data between a DLEC (data local exchange carrier) such as ConnectSouth and its trading partners, greatly reducing the time required to turn on service for new customers. The ezLocal gateway will help ConnectSouth bond electronically with SBC Communications and BellSouth Telecommunications to order network facilities for customers and to support line sharing.

The line-sharing capability that DSET's ezLocal gateway enables for ConnectSouth's customers is mandated by a 1999 FCC ruling. Before line sharing was mandated, customers who obtained high-speed Internet access from a competitive DLEC typically needed a new phone line and number for DSL service in addition to the lines and numbers for their existing local exchange voice service. Now, with the help of the ezLocal gateway's unique DSL-support capabilities, customers served by ConnectSouth will be able to receive DSL service at their existing local exchange numbers.

The DSET gateway will be integrated with software from various suppliers to facilitate flow-through ordering and order management, including DSET alliance partners CommTech Corporation and Vitria Technology.

"Though the benefits of the DSET ezLocal Gateway will be invisible to the ConnectSouth customer, they will benefit immensely from the speed and efficiency that this program brings to our provisioning system," said Dr. Ralph Freeman, chief information officer for ConnectSouth. "Building a high-quality, reliable network, and providing that service to customers as efficiently and positively as possible is the first step in making customers more productive, efficient, and competitive."

Phil Cavallo, DSET's senior vice president of worldwide sales and marketing added, "As a DLEC focused on offering data services over DSL, ConnectSouth has a unique view of the OSS environment. We at DSET are excited about their approach and the mix of software partners and integration efforts. Starting with the ordering of dry copper pairs through our ezLocal gateway, ConnectSouth is building a production environment that will make turning on high-speed data services for their customers fast, efficient, and cost-effective."

In addition to the DSL provisioning capabilities provided by the ezLocal gateway, DSET solutions automate a wide range of other operations for competitive carriers across the United States. DSET products automate generating comparative sales quotes and the ordering of local loops and high-capacity circuits, as well as providing support for number portability, 911 emergency service, and 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 ConnectSouth:

ConnectSouth Communications, Inc., headquartered in Austin, Texas, is an "e-enabler," providing a full range of high-speed connectivity and Internet business application tools for small- and medium-sized businesses in traditionally under-served cities and towns in the Southern Region of the United States. For more information, visit ConnectSouth's website (www.connectsouth.com), or call 1-877-309-5557.

About DSET:

DSET Corporation is a leading provider of business-to-business e-commerce connectivity 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.

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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

ConnectSouth Contact: Tad Druart, Director of Public Relations, 512-681-9912, e-mail: tdruart@connectsouth.com

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