CAIS Internet Leverages Unisys to Accelerate Roll-Out of High Speed Internet Network and OverVoice Support Services.

WASHINGTON--(BUSINESS WIRE)--Aug. 3, 1999--

Relationship Bolsters Deployment of CAIS Internet Total High

Speed Multi-Point Solution In Hotels And Apartment Communities

Worldwide

CAIS Internet and Unisys Corporation announced today an alliance that will accelerate a full range of Unisys installation, maintenance, and end-user and network support services for CAIS Internet's OverVoice(R) total high speed Internet solution in hotels and apartments worldwide.

The partnership - which mobilizes a global workforce of Unisys field operations, project managers and installers - aggressively expands CAIS's business plans to deploy the OverVoice total multi-point high speed Internet access solution around the world. In the U.S. alone, Unisys will equip CAIS with the capabilities to install in more than 200 hotel and apartment properties, or 60,000 units, per month.

Unisys provides CAIS Internet Field Operations and Implementations Teams with significant resources, including the Unisys portfolio of network and end-user support services, installation, maintenance, and ongoing project and program management. Unisys will help CAIS meet the demand to deliver OverVoice, and provides a full-service infrastructure to bolster CAIS's established field operations framework.

"We are proud to partner with Unisys. Their global service capacity will enable CAIS to aggressively meet OverVoice deployment schedules," said Ulysses G. Auger II, CEO, CAIS Internet. "The partnership takes advantage of Unisys's reach and will make OverVoice installations most efficient with high-level project management expertise, proactive network management, and responsive end-user support."

"With its range of broadband Internet solutions for multi-unit properties, CAIS Internet is providing new levels of connectivity for business travelers, residents, and property managers," said Gerry Gagliardi, president of Unisys Global Customer Services. "We are excited about the opportunity to apply Unisys expertise in large-scale, multi-site installations and managed services to these projects."

About OverVoice by CAIS Internet - the total solution for high speed Internet access

Unlike other multi-point high Internet connectivity approaches, CAIS Internet is a single source for high speed Internet access services and a multi-point distribution solution. CAIS delivers the high speed bandwidth off its nationwide backbone to the hotel or building, and with OverVoice(R) by CAIS Internet patented technology, distributes the high speed Internet access up to 10 Mbps to multiple users. CAIS also has plans to rollout its 10 and 100 Mbps home networking solutions with its single point of contact solution.

OverVoice technology is a cost-effective and sensible solution for hotels and apartment communities wishing to makes properties high speed Internet-ready. OverVoice technology is simply installed on top of the property's existing telephone system to create an Ethernet local area network like that found in many businesses. OverVoice provides users an uninterrupted, dedicated high speed Internet connection that can be shared simultaneously among multiple users.

About Unisys

Unisys is more than 33,000 employees helping customers in 100 countries apply information technology to solve their business problems. Unisys solutions are based on a broad portfolio of global information services including electronic business, systems integration including custom and "repeatable" application solutions, outsourcing, Microsoft Windows NT services, network services, and multivendor maintenance and support, coupled with enterprise-class servers and associated middleware, software and storage. Repeatable solutions are focused on key vertical markets including financial services, transportation, telecommunications, government, publishing, and other commercial markets. The company is headquartered in Blue Bell, Pennsylvania, in the Greater Philadelphia area. For more information on the company, access the Unisys home page on the World Wide Web at www.unisys.com. Investor information can be found at www.unisys.com/investor.

About CAIS Internet

CAIS Internet (Nasdaq: CAIS) is a leading Internet service provider, delivering the latest in end-to-end high speed Internet access solutions for consumers and businesses. CAIS operates three different major business lines: high speed Internet access to multi-user environments with its patented OverVoice(R) solution (hotels and apartment communities, and home networking solutions in beta-test); high speed Internet access using HyperDSL lines to commercial and residential customers; and dedicated Internet access to businesses and other Internet providers. All CAIS Internet services are delivered with expert technical and customer support.

CAIS Internet operates a nationwide, clear-channel DS3/OC3 and ATM Network. CAIS, a Cisco-Powered Network, currently peers with public and private partners, and at national exchange points MAE East, MAE East ATM, MAE West and AADS.

NOTE: OverVoice and CAIS are registered trademarks of CAIS Internet.

This release contains statements relating to CAIS's future expectations and business strategies or other "forward-looking" information. Those statements are subject to known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from those contemplated by the statements. Important factors that may cause actual results to differ from projections include, among others: changes in business conditions; changes in the Internet services industry and the general economy; our limited operating history; our ability to manage rapid growth; our ability to enter into joint ventures and other strategic relationships with companies on terms acceptable to us; and the impact of computer and related problems that may arise from the Year 2000 problem on our business.

Information on CAIS is available by calling 888-260-CAIS, or by visiting the company's web site at www.cais.com.