TMNG and DSET Partner to Provide Leading OSS Solutions to the Global Telecom Market

Companies Will Collaborate to Further Expand TMNG Lexicon®

Overland Park, KS, and Bridgewater, NJ - July 31, 2000 - The Management Network Group, Inc. (Nasdaq: TMNG), a leading provider of management consulting services to the global telecommunications and e-business industries, and DSET Corporation (Nasdaq: DSET), a leading supplier of business-to-business e-commerce connectivity solutions for the telecom industry, today announced a strategic alliance to provide leading-edge OSS solutions to communications service providers worldwide.

Working together on a non-exclusive basis, the two companies will provide mutual clients with best-in-class OSS (operations support system) solutions, including OSS interconnection solutions based on DSET's electronic-bonding gateways. They will also collaborate to expand TMNG's OSS practice and enhance TMNG's NextGen Process Architecture™, particularly the TMNG Lexicon tool set, by incorporating the functionality of DSET's leading-edge OSS interconnection solutions.

The proprietary TMNG Lexicon tool set is used to quickly and efficiently analyze a competitive carrier's business requirements by applying a comprehensive database of best-in-class industry requirements and practices that address areas such as order entry, billing, customer care and fraud management. Continually expanded and updated, the TMNG Lexicon tool set has been used extensively by TMNG's consultants at top telecommunications companies around the world.

OSSs today encompass all the back-office systems required to run a telecommunications company including provisioning, billing, customer relations, fraud management and much more. Building an effective OSS architecture is a complex process and new competitive carriers typically rely on the expertise of companies such as TMNG to recommend appropriate solutions for this critical task. DSET provides electronic bonding software that interconnects the OSSs of competitive carriers and their trading partners to automate the exchange of data essential for processes such as sales, ordering circuits, local number portability, and trouble-ticket management. Such interconnection is the key to flow-through efficiency and scalability to meet the demands of the deregulated telecom market.

Richard Nespola, President and CEO of TMNG, commented, "Both TMNG and DSET have been aggressively leveraging their respective industry positions to help leading telecom providers around the globe build their business-process infrastructures. DSET's connectivity solutions are filling an important need in the OSS segment. We look forward to working together with the DSET team to offer a complete and highly competitive OSS solution to our mutual clients."

"TMNG represents a unique view of the industry in having done substantial process consulting and overall telecom design work," added Bill McHale, President and CEO of DSET. "We believe that this unique experience in combination with the DSET product offering will yield significant value to our CLEC and DLEC customers."

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.

About TMNG
The Management Network Group, Inc. (TMNG) is a leading provider of strategy, management, operational and e-business consulting services to the global telecommunications industry. With over 400 consultants worldwide, TMNG serves communications service providers, technology companies and financial services firms. Since its inception in 1990, TMNG has performed services for over 230 clients worldwide. The company is headquartered in Overland Park, Kansas, and has offices located in Chicago, Washington, D.C., Sacramento, San Francisco, New York, Toronto, London and Buenos Aires. TMNG can be reached at 1.888.480.TMNG (8664) or online at http://www.tmng.com.

CONTACT:
Kelly Kirkendoll
The Management Network Group, Inc. (TMNG)
kelly.kirkendoll@tmng.com
888.480.TMNG (8664)

DSET Corporation
Dean Maskevich, Marketing Communications
908-526-7500 Ext. 1366
dmaskevi@dset.com

Brainerd Communicators
Ryan Barr (Investors)
barr@braincomm.com

Ann Travers (Media)
travers@braincomm.com
212-986-6667