DSET Reports Record Sales and Earnings for the
Fourth Quarter and the Year

Company Ends 1999 with 23 CLEC and 3 ILEC Customers for Gateway Products

Bridgewater, NJ - February 8, 2000 - (NASDAQ: DSET) - DSET Corporation, a leading supplier of business-to-business e-commerce solutions for the telecom industry, today reported record net income and revenues for the fourth quarter ended December 31, 1999. This was the company's twenty-seventh consecutive profitable quarter. Net income and revenues for the year ended December 31 were also at record levels.

Net income for the quarter amounted to $3.2 million, or $0.27 per share, assuming dilution, as compared with $1.9 million, or $0.17 per share, assuming dilution, for the quarter ended December 31, 1998. The weighted average number of fully diluted common shares outstanding in each period was 11.8 million and 11.4 million, respectively.

Total revenues for the quarter amounted to $15.1 million, as compared with $9.2 million for the same period in 1998, a 64.3% increase. Of this amount, $8.3 million or 54.7% came from sales to competitive local exchange carriers (CLECs) and incumbent local exchange carriers (ILECs), with the balance coming from sales to network equipment vendors. Geographically, revenue from North America comprised 96.0% of total revenue.

During the quarter, license revenues accounted for $8.1 million compared to $6.4 million for the same period a year ago, a 26.7% increase. Service revenues accounted for $7.0 million compared to $2.8 million in 1998, a 150.8% increase. The significant increase in service revenues was mainly due to including sales of certain DSET products for CLECs that have yet to be released for final production. Revenues from these products, which include DSET's ezSubscribe and ezTroubleAdmin solutions, amounted to $4.1 million in the fourth quarter of 1999. These products should be released in the first half of 2000 and will be sold as licensed products to other CLECs.

Gross margin for the quarter was 82.0% versus 84.1% in the prior year. Gross margin for license revenues increased to 92.1% in the fourth quarter from 90.2% for the comparable 1998 period. The gross margin for service revenues increased to 70.3% in the fourth quarter of 1999 from 70.0% in the same quarter of 1998.

Net income for the twelve months ended December 31, 1999 was $6.5 million or $0.59 per share, assuming dilution, as compared to $4.8 million or $0.43 per share, assuming dilution, last year.

Revenues for the twelve-month period increased 52.4% to $44.6 million as compared to $29.3 million in the prior year. License revenues were $24.1 million, or an increase of 47.4% for the twelve-month period, and service revenues were $20.5 million, or an increase of 58.6% as compared to the prior year.

"Our results for the quarter, as well as for the year, clearly demonstrate the success of DSET's strategy for transitioning from a company that specialized in software-development tools to one that has become a leading provider of e-commerce solutions for the telecom industry," said Bill McHale, president and chief executive officer of DSET.

"In the quarter, we won sales from five CLECs and an ILEC that amounted to more than eight million dollars. This increased the number of our customers to twenty-three CLECs and three ILECs, with total 1999 sales to such providers reaching almost twenty million dollars. This amounted to 44 percent of 1999 revenues, which exceeded our own expectations of 35 to 40 percent.

"At the end of 1998, we had just four CLEC customers and no ILEC customers. Compared to 1998, sales of our gateway products increased over 650 percent by the close of 1999. That's exceptional performance by any measure, and we feel that DSET has staked out a leading position that will enable us to generate continued growth in 2000 and beyond."

McHale highlighted various factors contributing to the results reported by the company. He said, "In 1999, the service providers that purchased our gateways were able to get them up and running as an integral part of their business operations by interconnecting with trading partners in virtually every part of the U.S. We delivered trading-partner interfaces for Ameritech, the Bell Atlantic North Region, the Bell Atlantic South Region, BellSouth, GTE, Pacific Bell, and Southwestern Bell. Other trading-partner interfaces are under development and we anticipate their availability in the near future.

"The interconnection capability that we have worked to provide reflects what may be our most important goal, giving our customers maximum flexibility with regard to where and how they operate. The majority of our CLEC customers have taken advantage of the close integration between DSET's gateways and MetaSolv's order-management software to quickly implement flow-through operating capabilities.

"However, our gateways can also be efficiently integrated with other order-management systems if a customer chooses. An example of this is our recent success at Gabriel Communications, where we will integrate our gateways with an order-management system from Eftia OSS Solutions Inc. In addition, as part of our program to partner with companies that complement DSET's offerings, we're working with Vitria Technology to enable interconnection between DSET gateways and an even greater range of operations support systems."

According to McHale, the company's expanding partnering program will yield other benefits for both DSET and its customers. As an example, he cited the agreement finalized in the fourth quarter between DSET and systems integrator BusinessEdge Solutions. He explained that partnering with systems integrators trained in the installation and testing of DSET products will accelerate the deployment of those products for the company's customers.

In addition to the very positive results for DSET's gateway products, the company has experienced continuing success with its number-portability solutions. McHale stated, "Revenue generated from DSET's Local Service Management System, which is essential number-portability software for switch manufacturers, was a strong complement to our gateway sales in 1999. In the fourth quarter, we added a third major network equipment manufacturer to the two that had already been reselling our LSMS as part of their hardware solutions."

"DSET's success for 1999 was rooted largely in sales to facilities-based CLECs, carriers that have their own switches. Estimates put the number of CLECs in this category at around two hundred. But there's a much larger group of CLECs referred to as 'resellers.' While these carriers purchase telecom services from trading partners and resell them at competitive prices, the services are provided exclusively via their trading partners' switches and phone lines. It's estimated that there are well over a thousand companies in this group, which we are now targeting by enhancing our gateway products with the capabilities such companies need."

McHale stated that a new version of the DSET ezLocal ordering gateway shipped towards the end of the quarter can be used by resellers to process phone-service orders for customers. He pointed out that the gateway's new support for an operating mode known as UNE-P allows a CLEC to lease any combination of network elements from a trading partner to provide local phone service at an increased margin for the CLEC.

"Facilities-based CLECs across the country have already deployed previous versions of our ezLocal gateway," McHale said. "Now, with ezLocal 2.6, we're making that product even more appealing to facilities-based carriers, in addition to addressing the needs of companies in the much larger resale segment of the market. The new UNE-P capability that we've built into ezLocal will enable facilities-based CLECs to turn on revenue streams in areas where they have yet to complete connections to their switches."

Asserting that the introduction of ezLocal 2.6 is just the beginning of DSET's response to increasingly diverse modes of CLEC operation, McHale stated that all of the company's pre-order, ordering, and post-order solutions will evolve as the industry demands. "Some CLECs are deploying systems to provide internal support for all of their operations, while others plan to make use of service bureaus or application service providers to facilitate business processes," he said. "But no matter how a CLEC chooses to operate, DSET products will have the flexibility to interface effectively with any operations environment and add substantial value to that environment."

"Over the next few months, we expect to announce solutions to support the marketing and ordering of DSL service that can be used by providers concentrating exclusively on data services and Internet access, as well as by CLECs expanding into this market. The first of our DSL products will enable a provider to identity which homes and businesses in a given area can actually receive DSL service and at what speeds. This is vital information for focused, profitable marketing. Our DSL solutions are premier examples of how we are expanding the number of products available to our customers."

Commenting on expectations for DSET's products and performance in 2000, McHale said, "We are confident that the very positive trends that emerged during 1999 will continue as we enter the new year. Based on our results to date, we strongly believe that gateway sales to CLECs, ILECs, and DLECs can double in 2000, building to as much as 70 percent of our total business."


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:

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

Media Relations: Kathy Claxton, Corporate Marketing Communications Manager,
908-526-7500 Ext. 1280, e-mail: kclax@dset.com

Investor Relations: John P. Murphy, Westfield Investor Relations, 908-233-1558,
e-mail: westfieldir@worldnet.att.net

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