C-COR Completes Purchase of Lantern Communications; Will Feature Lantern's 10 GigE Packet-Based Transport Technology at SCTE's Cable-Tec Expo 2004.

Business Editors/High-Tech Writers

SCTE Cable-Tec Expo 2004

STATE COLLEGE, Pa.--(BUSINESS WIRE)--June 1, 2004

C-COR.net Corp. (Nasdaq:CCBL), a global provider of broadband communications transport products, software systems, and technical services, today announced that it has completed the purchase of substantially all of the assets and certain liabilities of Lantern Communications, Inc., a provider of Metropolitan Area Network (MAN) packet-based transport solutions, under the terms and conditions of the agreement previously announced on April 15, 2004, and May 19, 2004. With the completion of this purchase, Lantern becomes a part of C-COR's Broadband Communications Products (BCP) division. Following the completion of the Lantern acquisition, C-COR intends to change its name to C-COR Incorporated.

Lantern Communications, based in Sunnyvale, California, is an innovator in packet-based transport solutions enabling scalable deployment of carrier-class, QoS (Quality-of-Service) assured Ethernet services across Metropolitan Area Networks. As a founding member of the Resilient Packet Ring (RPR) Alliance, Lantern is recognized as a pioneer in the development of RPR technology for migrating packet-based technologies from Local Area Networks (LANs) to MANs. RPR technology is the emerging solution-of-choice for metro data transport applications because it combines the high availability and reliability of existing voice-optimized circuit-switched infrastructures with the superior bandwidth utilization, simplicity, and cost advantages of Ethernet. These capabilities make RPR well suited to support converged multi-service networks that will carry bandwidth-hungry data, voice, and video traffic. C-COR anticipates that Lantern's Metro Packet Switch (MPS) system, which incorporates advanced bandwidth management and QoS techniques supporting deterministic services over an all-packet edge infrastructure, will form the foundation for a new generation of C-COR's digital video transport product line. C-COR will provide live demonstrations of video over a protected packet network using the MPS system in its booth #856 at the SCTE (Society of Cable and Telecommunications Engineers) Cable-Tec Expo, June 15-18, 2004, in Orlando, Florida.

About C-COR (www.c-cor.net)

C-COR is a top-tier global provider of optical packet and digital video transport communications products; end-to-end fiber-to-the-premise systems; comprehensive operations support systems (OSS) software solutions; and high-end technical outsourced field services--all supporting cost-effective delivery of voice, video, and high-speed data over advanced broadband networks. Headquartered in the U.S. with facilities worldwide, C-COR's mission is to provide our customers with second-to-none network integrity throughout the full network life cycle. C-COR's common stock is listed on the Nasdaq National Market (Symbol: CCBL) and is a component of the Russell 2000 Stock Index.

Some of the information presented in this announcement constitutes forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements represent the Company's judgment regarding future events, and are based on currently available information. Although the Company believes it has a reasonable basis for these forward-looking statements, the Company cannot guarantee their accuracy and actual results may differ materially from those the Company anticipated due to a number of uncertainties, many of which the Company is not aware. Factors which could cause actual results to differ from expectations include, among others, capital spending patterns of the communications industry, changes in regard to significant customers, the demand for network integrity, the trend toward more fiber in the network, the Company's ability to develop new and enhanced products, the Company's ability to provide complete network solutions, continued industry consolidation, the development of competing technology, the global demand for the Company's products and services, and the Company's ability to complete and integrate acquisitions and achieve its strategic objectives. For additional information concerning these and other important factors that may cause the Company's actual results to differ materially from expectations and underlying assumptions, please refer to the reports filed by the Company with the Securities and Exchange Commission.