ADC Telecommunications Teams with AT&T Broadband & Internet Services on Cable Telephony Trial.

MINNEAPOLIS--(BUSINESS WIRE)--May 19, 1999--

-- Suburban Denver trial to showcase ADC's Homeworx(tm) cable

telephony system --

ADC Telecommunications, Inc. (Nasdaq: ADCT; www.adc.com), today announced the field trial of its Homeworx(TM) cable telephony platform with AT&T Broadband & Internet Services, AT&T's newest business unit. A select number of AT&T Broadband & Internet Services subscribers in the Denver area are being provided with ADC's multiple-line Homeworx home integrated services unit (HISU) to add telephony service to their existing cable TV service.

ADC's Homeworx hybrid fiber/coax (HFC) system offers highly reliable lifeline telephone service over cable networks using standard telephones and delivers more telephone capacity than any other platform in the industry. AT&T's suburban Denver trial is focused on the system's ability to deliver carrier-grade telephone service over standard HFC cable networks.

"As a leader in the cable telephony field, ADC has designed a complete HFC telephony solution," said Rick Mantz, vice president and general manager of ADC's Broadband Networks Division. "With the Homeworx system, AT&T has the capacity and reliability to offer and compete for primary-line telephony service to both single family and multiple-dwelling residences."

"Cable operators are looking for a system that will facilitate a smooth entry into local access competition," said Claude Romans, director of loop access for Ryan Hankin Kent, a telecommunications research firm in San Francisco. "Not only must these cable telephony solutions be reliable, they must also offer high capacity to maximize service offerings and lay the foundation for growth."

Homeworx offers service providers, like AT&T, more telephone capacity than other available solutions by supporting up to six times the telephony traffic per 6 MHz channel of bandwidth. Along with increased capacity, Homeworx provides optimum protection against common RF impairments in HFC plants. The system also provides a fully redundant HFC configuration that enables service providers to offer the same availability and reliability provided by traditional telco operators.

Product Information

ADC's Homeworx system is the industry's most complete HFC telephony platform, providing the most reliable and highest-capacity system currently available. Homeworx uses OFDM modulation, which affords superior performance against the HFC impairments such as group delay, multipath, ingress noise and narrowband interference. ADC offers cable television operators the Homeworx DualTech(tm) system for a cost-effective migration path from circuit-switched to standards-based lifeline Internet protocol (IP) telephony.

ADC Telecommunications, Inc., is a leading global supplier of voice, video and data systems for telephone, cable television, Internet, broadcast, wireless and private communications networks. ADC's systems enable local access and high-speed transmission of communications services from providers to consumers and businesses over fiber-optic, copper, coaxial and wireless media. Headquartered in Minneapolis, Minnesota, ADC has approximately 9,600 employees around the world and annual sales of $1.5 billion. For additional information, visit our Web site at www.adc.com.