UTStarcom Chooses DSET's GR-303 Application Development Suite.

BRIDGEWATER, N.J.--(BUSINESS WIRE)--Aug. 21, 1998--DSET Corporation (NASDAQ: DSET) announced today that UTStarcom, a provider of advanced telecommunications technologies, has chosen DSET's GR-303 Application Development Suite to develop their GR-303 applications. UTStarcom evaluated a number of application development tools vendors and concluded that DSET provided the features, functionality and commitment to the specialized needs of this technology that they require to compete in the growing global digital access market.

"UTStarcom is a successful player in the carrier access market, especially in China's rapidly growing telecommunications market. They realize the importance of building to accepted standards, especially in the heterogeneous global marketplace they cover. DSET represents a strong solution for creating standards-based applications that handle the multiple and differing protocols encountered within the GR-303 domain," said Phil Cavallo, Vice President of Marketing and Product Management.

"DSET has been a major player in GR-303 since it inception. Bellcore chose DSET's CMISE and ROSE protocols as the building blocks of their 303-Test Bed back in 1992. As a company, we've embraced the market segment and offer our customers an optimized solution... a ToolKit that is enhanced specifically for the development of GR-303 applications," Cavallo continued.

"We've gone with the leader in GR-303 technology," remarked Paul Berkowitz, UTStarcom's Vice President of Product Management. "DSET understands the intricacies of GR-303: the unique GDMO model; the complex protocol interface requirements within the RDT (Remote Digital Terminal); and its ability to provide mediated access to several EOCs (Embedded Operations Channels) in an unbundled environment. This base of knowledge and DSET's long-term experience in the field made the choice an easy one."

Acronyms:

GR-303 - A Bellcore specification for local access CMISE - Common Management Information Service Entity ROSE - Remote Operations Service Entity GDMO - Guidelines for the Definition of Managed Objects

About DSET:

DSET, founded in 1989, is a leading provider of standards-based application development tools, custom application development services, Local Number Portability solutions and OSS Interconnect Gateway products to the telecommunications industry. The company's application development tools are used globally by network equipment manufacturers to build applications that manage network devices and provision new services such as voice, data and Internet access. The company's local number portability (LNP) and OSS interconnection solutions are used by carriers to facilitate the flow of information between carriers and their respective operational support systems (OSS's). DSET's Professional Services organization provides application development services for those customers without the internal resources to quickly build network management, number portability or OSS interconnection solutions.

The company has offices in Bridgewater, NJ, Richardson, TX, Campbell and Fremont, CA, a wholly owned subsidiary in Chengdu, China, and supports a network of distributors and strategic partners around the world.

About UTStarcom:

UTStarcom is a privately held provider of network access, wireless communications, and intelligent network systems. Based in Alameda, CA, with its principal R&D center in Iselin, NJ.

Except for historical and factual information contained herein, all other information set forth in this news release represents forward-looking statements, including all statements about DSET's plans, beliefs, estimates and expectations. These statements are based on current estimates and projections that involve certain risks and uncertainties and could cause actual results to differ materially from those in the forward-looking statements. Investors are encouraged to consider these risks and uncertainties which are discussed in documents filed by DSET with the Securities and Exchange Commission, including, without limitation, fluctuation of quarterly operating results, dependence on a rapidly evolving telecommunications industry, and dependence on the TMN industry standard. DSET undertakes no obligation to publicly update any forward-looking statements whether as a result of new information, future events or otherwise.

Please visit our web site at www.dset.com.

    CONTACT: DSET Contacts:
              Investor Relations:
              Paul Lipari, Chief Financial Officer
              908/526-7500 x 288
                   or
              Public Relations:
              Alan R. Ehrlich, Product Marketing Manager
              908/526-7500 x 223
              e-mail: [e-mail]
                    or
              UTStarcom Contact:
              Jerry Soloway, 732/767-5217
              e-mail: [e-mail]