Louisville, Colorado, July 27, 1999—Cable Television Laboratories, Inc. (CableLabs®), the research and development arm of the U.S. cable television industry, will add a wealth of Y2K integration and interoperability testing results provided by member company MediaOne to the CableLabs Y2K website, located at y2k.cablelabs.com.

MediaOne, the broadband services arm of MediaOne Group (NYSE:UMG), successfully completed most of its eight-month, multi-million dollar Y2K Integration and Interoperability testing efforts, and will share test results with the cable industry through CableLabs. MediaOne's testing results will begin to appear on the CableLabs' Web site later this week; by the end of August, all results will be posted. CableLabs' Y2K information is available to all interested parties.

MediaOne is in the process of releasing testing data on various computer systems and supporting infrastructure for the majority of the company's "mission critical" processes, including ad sales, customer care and billing, core video, high-speed data and telephony. Other information currently available from CableLabs includes a number of useful documentation templates for testing and contingency planning, and links to cable vendor web sites for additional Y2K information.

"CableLabs has been focused on how the Year 2000 could impact the cable industry, and has been a driving force in leading the industry to Y2K compliance," said Dr. Richard R. Green, CableLabs president and CEO. "We are pleased that MediaOne is sharing its Y2K information with us, as they have developed and implemented a truly comprehensive testing approach. The results will be of great value to the entire cable industry."

"The cable industry has a great history of working together on common goals," said Decker Anstrom, president of the National Cable Television Association. "This is a terrific example of industry cooperation that will benefit cable customers, and I greatly appreciate MediaOne's leadership on the Y2K issue."

"Our Y2K team has made solid progress on preparing us for the coming of the millennium," said Jan Peters, president and CEO of MediaOne. "CableLabs tells us that other cable companies, particularly smaller ones, might benefit from the results of the extensive testing program we have developed and executed. In the spirit of collaboration, we're pleased to share our results with the rest of the cable industry."

Y2K testing information is available at y2k.cablelabs.com. Operators also can email CableLabs a formal request for information at y2k@cablelabs.com.

About MediaOne
MediaOne Group is one of the world's largest broadband communications companies, bringing the power of broadband and the Internet to customers in the United States, Europe, and Asia. The company also has interests in some of the fastest-growing wireless communications businesses outside the U.S. For 1998, the businesses that comprise MediaOne Group produced $7.1 billion in proportionate revenue. On May 6, 1999, the company entered into an agreement to merge with AT&T.

About CableLabs
About CableLabs: Cable Television Laboratories (www.cablelabs.com) was founded in 1988 by members of the cable television industry. A non-profit research and development consortium, CableLabs delivers innovations that enable cable operators to be the providers of choice in their markets. Cable operators from around the world are members. CableLabs maintains web sites at www.cablelabs.com; www.packetcable.com; www.cablemodem.com; www.cablenet.org, and www.opencable.com.

CableLabs® is a registered trademark of Cable Television Laboratories, Inc. Other CableLabs marks are listed at http://www.cablelabs.com/certqual/trademarks. All other marks are the property of their respective owners.