L-3 Communications Announces Celerity to Provide Test Instrumentation for Sirius Satellite Radio.

Business Editors & Technology Writers

NEW YORK--(BUSINESS WIRE)--May 22, 2002

Celerity Systems Inc., a division of L-3 Communications (NYSE:LLL) and the leader in digital broadband test and measurement, today announced an agreement with Sirius Satellite Radio, a premier provider of Satellite Digital Audio Radio Service (SDARS).

Under the terms of the agreement, Celerity will deliver development, field-measurement, and production test solutions for Sirius. These solutions are also available for use by original equipment manufacturers (OEM's) and producers of after-market SDARS radios. With 200 million registered vehicles, 15 million annual new passenger vehicle sales, and after-market auto radio sales of 10 million units, analysts believe SDARS subscribers could achieve 5 to 8 million users by 2005.

"Celerity has consistently delivered cutting-edge technology combined with real cost-savings for our test and validation requirements," said Gary DeLibero, director of Mobile Testing and Quality Assurance at Sirius Satellite Radio. "We are especially pleased with the responsiveness and support the company has provided."

"Sirius Satellite Radio is pioneering a true breakthrough in consumer entertainment," said Bruce Moore, president and general manager of Celerity Systems Inc. "Their attention to detail in testing and validating their satellite and repeater network proves their dedication to success in this endeavor. We are as proud to be selected by Sirius as we are of the test solutions we have delivered to Sirius and its manufacturing partners."

Celerity is a division of L-3 Communications specializing in the design, development, and production of digital broadband test and measurement solutions. With expertise in signal generation and analysis, channel simulation, and wideband signal capture, Celerity has become the leader in digital broadband test and measurement. More information on the company and their products is available at http://www.celeritydbt.com/or by calling 408-873-1001. The company is located at 10411 Bubb Road, Cupertino, CA 95014.

Headquartered in New York City, L-3 Communications is a leading merchant supplier of Intelligence, Surveillance and Reconnaissance (ISR) products, secure communications systems and products, avionics and ocean products, training products, microwave components and telemetry, instrumentation, space and wireless products. Its customers include the Department of Defense, selected US government intelligence agencies, aerospace prime contractors and commercial telecommunications and wireless customers.

To learn more about L-3 Communications, please visit the company's web site at www.L-3Com.com.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995: Except for historical information contained herein, the matters set forth in this news release are forward-looking statements. The forward-looking statements set forth above involve a number of risks and uncertainties that could cause actual results to differ materially from any such statement, including the risks and uncertainties discussed in the company's Safe Harbor Compliance Statement for Forward-looking Statements included in the company's recent filings, including Forms 10-K and 10-Q, with the Securities and Exchange Commission.