News Release

CAIS Internet and Cisco to Offer Advanced End-To-End Networking Solutions

CAIS Internet Becomes Cisco Powered Network to Offer
Jan 27, 1999

CAIS Internet Becomes Cisco Powered Network to Offer Customers Reliable, Secure and High-Performance Broadband Internet Services

Washington, D.C. -- January 27, 1999 -- CAIS Internet and Cisco Systems, Inc. (NASDAQ: CSCO) announced today an agreement for several CAIS Internet services to be qualified for the Cisco Powered Network Program.

CAIS Internet and Cisco Systems in its Cisco Powered Network Program are teaming to offer reliable, secure and high-performance Internet services. The relationship highlights CAIS Internet and Cisco's focus on delivering corporate network-based applications like Internet access and frame relay.

"CAIS Internet and Cisco together enhance the IP network to deliver intelligent business solutions, and provide our customers with strategic competitive advantages," said Evans Anderson, senior vice president of sales and marketing and general manager, CAIS Internet. "By working with the recognized worldwide leader in networking, we can reassure our customers that CAIS Internet services are Cisco-powered, and that CAIS Internet leads the industry in reliability, performance and innovation."

"A New World communications infrastructure is being built today based on Internet technology comprised of a variety of services that appeals to a customers future desires and current needs," said Larry Lang, Cisco's vice president of service provider marketing. "CAIS Internet's relationship with Cisco should communicate confidence to CAIS Internet's customers that CAIS Internet is being aggressive in delivering high performance network services that are reliable, secure and responsive to their business needs."

In the Cisco Powered Network Program, CAIS Internet will provide services based predominantly on Cisco equipment and software. CAIS Internet's participation in the program - including use of the Cisco Powered Network logo to brand its services and marketing support materials - demonstrates CAIS Internet's ability to provide innovative services and industry-leading technology solutions to create a New World communications infrastructure.

About CAIS Internet

CAIS Internet, headquartered in Washington, D.C., is a tier-one Internet Service Provider that delivers a full range of high speed Internet solutions, including the latest in xDSL technology, CAIS HyperDSL home and business high speed Internet access. CAIS Internet also delivers other leading edge solutions like OverVoice -- the patented and patent-pending same line/same time voice and data technology. Information on CAIS Internet is available at the CAIS Internet web site, or by calling 888-260-CAIS.

Cisco Systems

Cisco Systems, Inc. (NASDAQ:CSCO) is the worldwide leader in networking for the Internet.

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CAIS, CAIS Internet and design are registered tradmarks of CAIS, Inc. OverVoice is pending trademark application.

Cisco, Cisco Systems, and the Cisco Systems logo are registered trademarks of Cisco Systems, Inc. in the U.S. and certain other countries. All other trademarks mentioned in this document are the property of their respective owners.