ADC and Appian Communications Partner to Provide Commercial Services Solutions for Cable MSO Networks.

Business Editors/High-Tech Writers

Cable-Tec Expo 2003

MINNEAPOLIS--(BUSINESS WIRE)--May 12, 2003

Solutions Enable Carrier-Quality Voice and Ethernet

Services for Businesses

ADC (Nasdaq:ADCT; www.adc.com) and Appian Communications today announced an agreement under which ADC will market, sell and support the Appian Communications Optical Services Activation Platform(TM) (OSAP(TM)), AppianVista and the newly announced Services Termination Unit (STU) products. With the addition of these products to its multiple system operator (MSO) solutions portfolio, which includes the Cuda(TM) 12000 IP Access Switch, the Cuda 1000 CMTS and FastFlow Broadband Provisioning Manager, ADC now offers a product set that will allow cable operators to deliver carrier-quality voice and Ethernet services to a broad base of commercial customers.

ADC will show the Appian OSAP and STU solutions in its booth #1553 at Cable Tec Expo in Philadelphia, May 12-14.

"Cable MSOs have actively deployed miles of fiber that passes thousands of small and medium businesses," said Lindsay Schroth, analyst with Yankee Group's Broadband Access service. "MSOs are beginning to realize that commercial services can be a significant opportunity to turn this infrastructure into new revenue. With this agreement, ADC is positioning itself to enter this market with a comprehensive solution, a broad customer base and the expertise to help MSOs address this opportunity."

"We are very pleased to forge this agreement with Appian, to offer a proven, carrier-class Ethernet and TDM services solution for small and medium businesses," said Hilton Nicholson, president of IP Cable Business Unit for ADC. "With more than five million business passed by cable and a multi-billion dollar annual revenue opportunity for the MSOs, Appian's solutions are a natural fit with our expanding initiative to deliver high-speed, business-class voice and data services for commercial customers."

"ADC is a recognized leader with a proven sales and support team addressing the cable MSO market," said Mick Scully, president and CEO for Appian Communications. "We are extremely pleased to work with ADC in the delivery of proven, carrier quality commercial service solutions to their customers."

The Appian/ADC solution provides for an integrated service platform to provide commercial services to customers over fiber and coax. The ADC Cuda platform services the customers over coax, while Appian's STU services the customers over fiber. The OSAP, designed to reduce the cost and complexity in grooming of voice and data services to an existing SONET/SDH or IP services backbone, offers a simplified Layer 2 aggregation architecture for both the Cuda and the STU platforms. This integrated fiber and coax services platform also enables reduced operating and capital expenses as it eliminates the need for more complex Layer 3 IP routing technologies.

ADC's Cuda 12000 is the world's most widely deployed carrier-class CMTS platform with more 700 units in use worldwide. The Cuda 12000 offers end-to-end quality of service (QoS), robust routing capabilities, extremely high availability and comprehensive system redundancy. Packet-Cable based, it provides MSOs with a solid foundation for advanced IP-based services.

Appian's OSAP and STU products offer a complete metro area access solution, optimized to extend the industry's most comprehensive suite of carrier-class Ethernet and TDM services to a broad footprint of small, medium, and large business establishments. The Appian solution combines the simplicity of Ethernet, advanced QoS, protocol interworking and native TDM support to enable the migration to resilient, carrier-quality Ethernet services that include Ethernet Private Lines, Layer 2 Virtual Private Networks (L2 VPN), Virtual Private LANs and high bandwidth Frame Relay/ATM Access.

About Appian Communications

Appian's award-winning solution is purpose-built for the migration from legacy TDM to next generation Ethernet services that are more scalable, efficient and profitable. In bringing the simplicity of Ethernet and patent-pending QoS to existing SONET/SDH networks, Appian's hybrid packet/TDM solution enables new service revenues while optimizing a carrier's investment in existing infrastructure and back office systems. Appian products are currently shipping to emerging and established service providers, including NTT Communications, around the world. For more information, please visit www.appiancom.com.

About ADC

ADC is The Broadband Company(TM). ADC offers high-quality, value-added solutions of network equipment, software and systems integration services that enable communications service providers to deliver high-speed Internet, data, video and voice services to consumers and businesses worldwide. ADC (Nasdaq:ADCT) has sales into more than 100 countries. Learn more about ADC Telecommunications, Inc. at www.adc.com.