ADC Telecommunications Announces Industry's First Global ATM Virtual Path Network Element with Next-Generation of Cellworx STN.

GENEVA--Oct. 11, 1999--

Industry-leading Cellworx (TM) STN Combines ATM Efficiency,

Increased STM-16/OC-48 Capacity and Expanded Service Options

for Carrier-Class, Multi-Service Delivery

ADC Telecommunications (Nasdaq:ADCT; www.adc.com) today announced international availability for the next generation of the Cellworx Service Transport Node (STN). As the industry's first global ATM Virtual Path (VP) ring transport element, the Cellworx STN will offer international carriers bandwidth-efficient, multi-service delivery to support current and future broadband demand.

"The global SDH and WDM market is estimated to reach $17.3 billion by 2003 with the highest percentage growth in Asia-Pacific and Western Europe," said Joe Savage, vice president of research for Ryan, Hankin, Kent, a San Francisco-based telecommunications research firm. "ATM Virtual Path transport and access platforms will play a key role as service providers build competitive SONET/SDH data networks."

In regions with exploding data growth, the Cellworx STN will enable service providers to meet increasing demand with a single platform while providing a migration path for future growth. With established global distribution channels in Asia-Pacific and Western Europe, ADC plans initial shipment of the new feature set to the high growth international markets starting at the end of 1999.

A breakthrough transport and access platform, the Cellworx STN enables carriers to flexibly provision bandwidth for an array of today's popular services such as frame relay, ATM cell relay, asymmetrical digital subscriber line (ADSL) and private-line circuit emulation. Utilizing the bandwidth efficiency of ATM VP rings, the Cellworx STN collapses multiple high-speed services on a single network layer and manages these services through a simple integrated network manager. Carriers can utilize the full service platform for transport and access without deploying expensive SDH/SONET overlay networks.

The Cellworx STN benefits global service providers looking for alternatives to existing SDH/SONET multiplexers with these next-generation features including the following:

-- STM-1c/OC-3c and STM-16c/OC-48c -- The Cellworx STN supports

STM-1c/OC-3c for smaller access ring applications and offers a

new level of scalability and capacity to extend the bandwidth

savings of ATM VP Ring technology further into the core network

with STM-16c/OC-48c. By eliminating exponentially increasing

inefficiency across SDH/SONET time division multiplexing (TDM)

access and transport networks, a carrier can potentially support

the same level of customer traffic on an STM-16c/OC-48c Cellworx

ring as it would with TDM-based STM-64/OC-192 networks. In

addition, carriers can perform in-service upgrades from DS3 to

STM-16c/OC-48c as their bandwidth needs grow.

-- E1 Circuit Emulation Service (CES)/ E1 ATM UNI -- These two

service types are located on a single access card with services

selectable on a port-by-port basis. This functionality removes

much of the risk for future planning. For carriers currently

offering Circuit Emulation services, provisioning ATM services is

as simple as configuring a port remotely.

-- E1 Frame Relay -- Service access multiplexing for data services

can be supported through the use of a channelized frame relay

access card. The card supports both network and service

interworking for transport of traffic over the backbone ATM

virtual path ring.

-- International Footprint -- The Cellworx STN now is available in

either 19-inch or 23-inch racks. This option will enable carriers

to integrate the Cellworx STN in existing 19-inch central office

configurations or expand port density in new deployments with the

North American 23-inch rack.

"The expanded features of the Cellworx STN are tailored to make international service providers more competitive and responsive to booming broadband demand. In an increasingly competitive global market, the Cellworx STN is a powerful tool for carriers to quickly build efficient multiservice broadband networks," said Karl Rookstool, vice president of marketing of ADC's Transport Systems Division. " Carriers will quickly realize the benefits of ADC's established ATM leadership coupled with existing international distribution channels."

The Cellworx STN currently offers STM-1 Cell Relay Service (CRS); STM-4 Ring Interface Card (RIC); DS1 Circuit Emulation Service (CES) and CRS and DS3 Channelized CES and CRS. While the Cellworx STN can be configured to efficiently backhaul ADSL traffic from external DSLAMs, ADSL access is provided in addition to existing high-speed transport and access. The added flexibility allows service providers to meet smaller concentrations of ADSL demand in the short term with a clear migration path to meet growing demand for the residential and SOHO mass deployments.

As an innovator in ATM technology and one of the original developers of ATM-based network access products, ADC helps carriers incorporate end-to-end ATM functionality into their networks. The company's leading ATM Access Concentrator products have been deployed in hundreds of networks around the world. With the Cellworx STN, ADC was one of the first companies to bring ATM VP ring technology and products to the market. The Cellworx STN is now deployed in four communication networks, including the Iowa Communications Network and Midcontinent Communications, and three reseller training/demonstration centers. In addition, the Cellworx STN is currently in nine evaluations/trials with telephone companies and private networks.

ADC Telecommunications, Inc. is a leading global supplier of broadband, multiservice networks providing network equipment, software solutions and integration services for voice, video and data communications over telephone, cable television, Internet, broadcast, wireless and private networks. ADC's broadband, multiservice networks enable local access, high-speed transmission and software management of communications services from service providers to consumers and businesses over fiber-optic, copper, coaxial and wireless media. Headquartered in Minneapolis, Minnesota, ADC has approximately 11,500 employees around the world and annual sales of $1.8 billion. ADC is an S&P 500 company. For additional information, visit our Web site at www.adc.com.

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