Impsat Selects Newbridge Networks for National Data Network Expansion.

KANATA, Ontario--(BUSINESS WIRE)--Dec. 8, 1998--

Multi-Services Platform Provides Private Line and Frame Relay Service

Delivery Under Unified Network Management Platform

Impsat, a Latin American value-added service provider with operations in Argentina, Brazil, Venezuela, Ecuador, Colombia and Mexico, today announced that it has selected Newbridge Networks (TSE:NNC)(NYSE:NN) for the expansion and upgrade of its national data network in Colombia and Teledatos, Colombia's national backbone network. Impsat will deploy Newbridge(R) MainStreet(R) time division multiplexers (TDM), enabling a smooth migration to advanced broadband platforms, such as the industry-leading MainStreetXpress(TM) family of networking products. Impsat plans to invest $3 billion over the next five years in its Latin American operations.

Newbridge TDM equipment constitutes the backbone of the Teledatos network, a data network jointly owned by Impsat and Empressa de Telecommunicaciones de Bogota (EBT), a service provider in the capital city of Bogota, Colombia. The Teledatos network provides voice and data services to Colombia's financial and health sectors. Under the agreement, Newbridge will supply the 3600 MainStreet Bandwidth Manager, the 3645 MainStreet High Capacity Bandwidth Manager and the 3600 series MainStreet data termination units (DTUs). This access equipment will be deployed in the Teledatos network, and introduced in Impsat's national data network.

Newbridge will also provide complete end-to-end network and service management through the industry-leading Siemens / Newbridge MainStreetXpress 46020 Network Manager. This highly scalable, comprehensive network management system offers a multi-services solution that provides effective manageability of services across the entire network -- from small, remote offices to large corporate centers.

"The Newbridge TDM solution and the support Newbridge is providing for the Teledatos network is unparalleled," said Miguel Ortiz, Vice President, Operations, Impsat. "The rapid expansion of our network reflects the total satisfaction of our customers with the reliability and robustness of the Newbridge solution."

"We are extremely pleased to have been selected by Impsat to migrate their networks to a multi-services platform," said Giulio Gianturco, Executive Vice President and General Manager of North and South America, Newbridge Networks. "Newbridge shares Impsat's commitment to provide the best and most innovative telecommunications services, with particular emphasis on quality of service and customer satisfaction."

Newbridge Networks (NYSE:NN)(TSE:NNC) designs, manufactures, markets and services networking solutions to organizations in more than 100 countries. The Company leverages its relationship with a growing family of Newbridge Affiliate companies, and strategic alliances with Siemens and 3Com Corporation to deliver seamless, end-to-end solutions. Newbridge customers include the world's 300 largest telecommunications service providers and more than 10,000 corporations, government organizations and other institutions. Founded in 1986, the company employs more than 6,000 people on five continents. News and information are available at www.newbridge.com.

Newbridge, logo and MainStreet are registered trademarks of Newbridge Networks Corporation.

MainStreetXpress is a trademark used by the Siemens / Newbridge alliance for comprehensive solutions in broadband communication. No agency relationship, partnership, or joint ownership of a legal entity is to be inferred or implied by the term alliance.