DSET's Net Income Up 61%; Revenues Up 55%

Results Driven by Sales to CLECs and DSL Providers

Bridgewater, NJ - April 20, 2000 - (NASDAQ: DSET) - DSET Corporation, a leading supplier of business-to-business e-commerce connectivity solutions for the telecom industry, today reported record first-quarter net income and revenues. This was the company's twenty-eighth consecutive profitable quarter.

Net income for the quarter ended March 31, 2000 amounted to $921,000, or $0.08 per share, assuming dilution, as compared with $572,000, or $0.05 per share, assuming dilution, for the quarter ended March 31, 1999. The weighted average number of fully diluted common shares outstanding in each period was 12.1 million and 11.3 million, respectively.

For the first quarter of 2000, total revenues amounted to $11.6 million, as compared with $7.5 million for the same period in 1999, a 55.1% increase. For the first quarter of 2000, license revenues accounted for $8.1 million, or 69.8% of total revenues, and service revenues accounted for $3.5 million, or 30.2% of total revenues. For the same period in 1999, license revenues accounted for $4.2 million, or 55.6% of total revenues, and service revenues accounted for $3.3 million or 44.5% of total revenues. Accordingly, compared to the first quarter of 1999, license revenues increased 94.9% and service revenues rose 5.4%.

Of total revenues, $7.0 million, or 60.2%, came from sales to competitive local exchange carriers (CLECs) and data local exchange carriers (DLECs), with the balance coming from sales to network equipment vendors. Geographically, revenues from North America comprised 95.6% of total revenues.

Gross margin for the quarter was 73.8% versus 79.3% in the prior year. Gross margin for license revenues decreased to 90.1% in the first quarter from 93.2% in the same quarter in 1999. Gross margin for service revenues decreased to 36.2% in the first quarter of 2000 from 61.9% in the same quarter of 1999.

Quarterly Analysis

Record Number of New Customers

DSET won a record number of 10 new customers in the quarter, all competitive service providers, which raised our total of such customers to 33. Our performance for the quarter and growth in our pipeline reinforce our belief that this emerging market is finally picking up steam.

The new customers for the quarter included three DLECs and seven CLECs. This is evidence of the initial success of our strategy to provide solutions for DLECs as well as providing our CLEC customers with the same DSL-based solutions.

Strong Year-Over-Year and CLEC Order Growth

Our 55% growth over Q1 1999 was driven by an approximate 400% increase from our 33 CLEC and DLEC customers. Even though our revenues are down sequentially, as has been our seasonal pattern, the $7.0 million in revenues from CLECs and DLECs was part of $11 million in new orders taken from this group of customers during the quarter. Given these trends, we believe that we are on the threshold of consistent sequential growth in CLEC and DLEC revenues as a result of our strong competitive position in this marketplace. As expected, revenues from our application tools business declined 39% from the first quarter of 1999 and 45% from the fourth quarter of 1999.

Stronger Mix of License and Service Revenues

License sales accounted for 70% of our revenues for the quarter, which reflects the fact that virtually all of our products previously under development are now shipping. As we go forward, we expect that license sales will generate 60% to 70% of our revenues for the year. The corresponding decrease in the percentage of service revenues reflects our move away from doing custom development work.

Operating Performance

· Operating income increased to 8.9% of revenues in the first quarter of 2000 from 4.9% of revenues in the first quarter of 1999.

· Operating expenses as a percentage of revenues were 64.9% in Q1 2000 compared to 74.4% in Q1 1999.

· Service margins at 36.2% were driven lower by higher implementation costs arising from the use of third-party resources and other support costs associated with satisfying customer requirements within a compressed time frame.

· We expect near-term improvements in hiring and training of DSET employees will reduce the need to use third-party resources for the implementation of our products.

· We believe that revenues from maintenance contracts should ramp up in the middle of the year as new CLECs deploy our products in their operating environments.

· We anticipate that quarterly services margins will increase to the 40% to 50% range by the third quarter.

· We believe that higher sales and lower operating-expense ratios over the remainder of the year will offset any higher customer-support costs incurred in the first half of the year.

Accounts Receivable Lower, DSOs Trending Down

Accounts receivable collection and days sales outstanding (DSOs) are areas where we made considerable progress during the quarter. This was accomplished through a concerted effort to improve our collection process, negotiate more advantageous contract provisions, and have our sales teams work more closely with customers to ensure cash collection.

· Total accounts receivable were reduced from $20.1 million as of December 31, 1999 to $14.4 million as of March 31, 2000, a 28% reduction.

· DSOs were reduced to 113 days as of March 31, 2000 compared to 122 days as of December 31, 1999.

· Unbilled receivables were $3.8 million as of March 31, 2000 in contrast to $4.8 million for the previous quarter, a 21% reduction.

· Percentage of completion (POC) sales, which drive unbilled receivables, were 20% of revenues for the first quarter of 2000 compared to a historical average of 30%. POC sales are expected to be less than 10% of total revenues by the end of the third quarter.

· Deferred revenues increased by 92% to $3.3 million as of March 31, 2000 as compared to $1.7 million as of December 31, 1999, mainly as a result of pre-paid maintenance contracts received in the quarter.

The accomplishments noted above contributed significantly to our $7.7 million increase in cash and marketable securities for the quarter.

We believe that we have reversed the rising trend in DSOs that we experienced in 1999. By the end of the third quarter, we expect our DSOs to drop to between 85 and 95 days.

Partners Played a Key Role

Our alliances with leading software suppliers and systems integrators was another key factor for success in the quarter.

· Our partnering with MetaSolv at various levels has contributed significantly to the fact that over 60% of DSET's customers now use our electronic-bonding gateways in combination with MetaSolv's Telecom Business SolutionTM (TBSTM) order management and service fulfillment solution.

· DSET is developing solutions with Vitria Technology to automate the exchange of data between DSET gateways and Vitria's BusinessWare® eBusiness platform to facilitate integration with virtually any operations support system (OSS) deployed by a CLEC. Additionally, the companies are working together to provide a complete flow-through provisioning solution for DLECs and ISPs in the DSL market.

· Under the terms of a multi-year agreement with Mercator® Software, DSET has been licensed to embed Mercator Enterprise Broker in DSET gateways as part of the overall solution for electronically interconnecting competitive service providers with a variety of trading partners.

· KPMG Consulting has selected DSET software products for the operations support system (OSS) architecture that KPMG recommends to competitive carriers. The DSET solutions will be demonstrated to potential customers at KPMG's Digital Broadband Solutions Centers nationwide.

· Agreements with systems integrators, including ADC Telecommunications and Danet Inc., will provide our customers with the comprehensive integration services needed to deploy DSET's electronic-bonding solutions at their sites.

New Products Announced and Shipping

In the first quarter, DSET announced new products and began shipping new releases of existing products.

· We announced the ezDSL Leads Qualification System, which can greatly increase the efficiency and economy of DSL sales and marketing efforts. This is the first in a suite of products to automate sales and provisioning processes for DSL providers and will ship in June 2000.

· A new version of DSET's ezLocal (LSR) ordering gateway shipped during the quarter and offers CLECs the advantages of UNE-P operation. Trading partner interfaces are now shipping for seven of the eight major incumbent local exchange carriers (ILECs).

· The latest version of the ezAccess (ASR) gateway for ordering special high-capacity circuits became operational at a major CLEC. Trading partner interfaces are now shipping for all major ILECs.

· New versions of DSET gateways that support local number portability (LNP) as well as 911, calling card, and caller ID services were also shipped during the quarter, all of which are integrated with MetaSolv's Telecom Business Solution (TBS) system. Trading partner interfaces are shipping for all of these products.

· We also started shipping our ezTroubleTicket gateway as an off-the-shelf product during Q1. This product includes a well documented API that enables integration with customer-care systems from Clarify, Siebel, and other suppliers.

· Our ezLongDistance (PIC) gateway went into operation at a key CLEC site.

Looking Forward

"Our experience during the first quarter reaffirms our belief that we can more than double our CLEC business in 2000," said Bill McHale, DSET's president and chief executive officer. "We've entered the DSL market and have already won customers in this important telecom segment, reinforcing the optimism we have regarding its potential for the future. We will also work with our strategic partners to maximize the options that our customers have for using DSET products.

"Our goal is to ensure that customers can get 'connected by DSET,' based on their own operating strategies. If they want to build an internal IT organization or outsource electronic-bonding to an ASP or clearing house, we'll help them get it done 'their way.'"

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

DSET and the DSET logo are registered trademarks of DSET Corporation.

MetaSolv is a registered trademark, and MetaSolv Software, Telecom Business Solution, and TBS are trademarks of MetaSolv Software, Inc.

BusinessWare is a registered trademark of Vitria Technology Inc.

Mercator is a registered trademark of TSI International Software Ltd., DBA Mercator Software.

All other trademarks are the property of their respective owners.

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