DSET Announces General Availability of IPSource 2.2.1

Includes real-time and error-free MPLS IP VPN Service Provisioning and Fully Supports Configuration Management

SHREWSBURY, N.J. June 29, 2002-DSET Corp., (NASDAQ: DSET) the industry's premier source of electronic bonding gateways and OSS solutions for global, multi-vendor networks, announced today the general availability of its previously announced IPSourceä 2.2, Release 1. IPSource 2.2.1 is the latest release of the company's innovative and high performance IP provisioning, activation, configuration and management platform that empowers service providers to roll-out new services to customers quickly, reliably and profitably.

IPSource provides integrated quality of service support for real-time and error-free Layer 3 MPLS IP VPN service provisioning. This work-flow based product provides end-to-end automation capabilities ranging from managing a service order/request to assigning resources and activating devices on the network, all in a flow-through and error-free manner.

"This latest release of IPSource offers the greatest degree of automation for provisioning, activation and configuration, which can translate into significant reductions in a provider's operating costs," said Dr. Binay Sugla, president and CEO of DSET. "We are very excited about the prospects of IPSource now that it is available in the market."

IPSource provides the capability to automate the management of device configuration. With IPSource, provider edge (PE) and customer edge (CE) routers are automatically configured in a flow-through manner. Configuration management capabilities include: versioning, backup and restore, as well as detecting changes to network configuration. Providers also can configure the network infrastructure, including Multiprotocol Label Switching Provisioning (LSP) needed for MPLS-Traffic Engineering (TE).

With IPSource, service orders are validated to ensure accuracy and resource allocation is carried out automatically as part of the service provisioning process. Features also include GUI-based support for reconciliation of VPN data and the capability to create and save partial VPN orders. IPSource also supports visualization of VPN.

This latest release of IPSource lets service providers generate increased revenue by defining services tailored to meet their customers' specific requirements. Service providers can customize the pre-defined IP service modules on the IPSource platform to create "branded" service offerings with features they choose to include. For example, quality of service (QoS) capabilities can be optionally integrated into offerings based on the way service providers choose to define their IP VPN services.

IPSource supports multi-vendor networks, enabling providers to meet customers' service requirements without the constraints of how a particular network equipment vendor defines key operating parameters that are difficult and costly to modify. The end-to-end provisioning, activation and configuration capabilities offered by IPSource also provides dramatic savings in overhead costs since providers can introduce and maintain services with a reduced IT staff, with minimal training required.

IPSource 2.2, Release 1 will be deployed in August in a customer trial with a major Tier-1 carrier. The general availability of Release 2 of IPSource 2.2, which includes enhancements to IPSec support for a VPN across multi-vendor devices and other exciting new features, is expected by the end of the year.

About DSET:

DSET Corporation (www.dset.com) is one of the leading providers of innovative OSS software solutions designed to minimize operational costs and maximize the value of service offerings for telecommunications providers around the world. Since 1989, DSET's field-proven products have been used to build critical global network applications that generate immediate return on investment. DSET's portfolio of industry-leading products include: IPSource, an advanced IP provisioning, activation and configuration solution enabling providers to deploy, modify and manage services quickly, reliably and profitably; and electronic-bonding gateways that allow competitive service providers to exchange information electronically with other telecommunications providers which significantly reduce the time required to provision services and resolve service outages for their customers.

Statements about financial matters 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:

Director of Marketing: Patricia Beninati, 732-945-6000 Ext. 240, e-mail: pbeninati@dset.com

Media Relations: Lorretta Gasper, Wind Rose Communications, 404-459-8878, e-mail: lgasper@mindspring.com

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