Cignal Signs a Multi-Year, $38 Million Contract to Provide Winstar with Worldwide Data and Internet Connectivity.

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Nov. 17, 1999--

Carriers to Team for Global Internet Coverage and

Services Distribution

Cignal Global Communications, a next-generation international data carrier, announced today that it has signed a $38 million agreement with Winstar Communications, Inc., a leading provider of local, long-distance and information services. Under the multi-year contract, Cignal will provide Winstar with dedicated broadband Internet access, Asynchronous Transfer Mode (ATM) data connectivity, packetized voice transport and other advanced data services throughout Europe and Asia.

Winstar is the latest in a series of telecom carriers and Internet Service Providers (ISPs) to partner with Cignal and utilize Cignal's suite of international data services. Unlike traditional data and Internet networks, Cignal's infrastructure is specifically designed to carry revenue enhancing real-time and bandwidth intensive applications like Voice over IP, desktop videoconferencing, network computing and streaming video.

"Winstar is exactly the type of customer Cignal targets: a carrier with broadband connections direct to end users," said Chris Rooney, Cignal's Chief Executive Officer. "With guaranteed quality service levels and our international focus, we enable Winstar to offer innovative Internet and real-time multimedia applications to its customers."

"Our relationship with Winstar has already allowed us to greatly increase our U.S. Internet coverage through the robust Tier 1 Internet backbone," said Andrew Perlman, Cignal's President and Founder. "In addition, the fact that Winstar has chosen Cignal to be one of its leading Internet and data connectivity partners in Europe and Asia says a lot about the quality of the global enhanced services network that we are building."

"We are very excited about expanding our new relationship with Cignal," said Winstar chairman and CEO William J. Rouhana, Jr. "It means wider network coverage, greater service offerings and increased revenues for both our companies. Through this new agreement with Cignal, we gain greater access to a global data network over which we can deliver high-quality broadband content to our customers around the world."

About Cignal Global Communications

Cambridge, Massachusetts-based Cignal is an advanced global data carrier providing toll-quality packetized voice, traditional data and Internet connectivity, and a set of real-time value-added Internet services. Cignal's target customers include carriers, Internet Service and Application Providers (ISPs and IASPs), and web content providers in the Americas, Europe and Asia. Cignal is expanding its facilities-based telecommunications network from the 13 countries it currently has in service to 25 by year-end 2000, giving it access to over 85 percent of worldwide communications traffic. Cignal is one of the first international carriers to integrate carrier grade voice, data and Internet services over a single network and guarantee Quality of Service levels using a combination of Internet Protocol (IP) and Asynchronous Transfer Mode (ATM). Its worldwide web address is http://www.cignal.com.

About Winstar

Winstar Communications, Inc. (www.winstar.com) helps companies around the globe engage in frictionless business through the use of seamless communications and technology. Winstar provides its customers with a complete set of high-quality, digital-age broadband communications services -- including high-speed Internet and data, Web-based information and local and long distance services.

Winstar offers these services in more than 70 markets throughout the U.S. and in Europe, Asia and South America. It is the largest holder of broadband fixed wireless spectrum, with licenses in the top 60 U.S. markets and in 10 international markets. Winstar's broadband fixed wireless capabilities complement and extend the reach of its extensive fiber network. The company's long-haul fiber network -- which supports IP (Internet Protocol), ATM (Asynchronous Transfer Mode) and frame relay -- will extend more than 16,000 route miles and cover all of the top 60 U.S. markets. Winstar's intracity fiber network will extend nearly 6,000 route miles in over 60 major domestic and international markets.

Winstar's Tier 1 Internet backbone and enhanced Web service offerings, including Web hosting and design, make Winstar one of the largest Internet companies in the U.S. The company's innovative applications enable businesses to take advantage of the new Internet economy. Recently, the company launched Office.com, A Service From Winstar(SM), (www.office.com) a premier Internet destination site designed to bring the best of the business Web to the desktop.

Except for any historical information contained herein, the matters discussed in this press release contain forward-looking statements that involve risks and uncertainties, which are described in Winstar's SEC reports, including the 10-K for the period ended December 31, 1998, and the 10-Q for the period ended September 30, 1999.

Winstar is a registered trademark, and Wireless Fiber and Office.com, A Service From Winstar, are service marks of Winstar Communications, Inc.