Corrigent Systems Completes Telcordia OSMINE Services Process for CM-100; First packet ADM to successfully achieve OSMINE milestone.

Business Editors/High-Tech Writers

SAN JOSE, Calif.--(BUSINESS WIRE)--April 15, 2003

Corrigent Systems, a leading provider of packet-ADM (Add Drop Multiplexer) transport systems for metropolitan networks, today announced that its CM-100(TM) product has completed the Telcordia(TM) OSMINE Services process for the Telcordia(TM) TIRKS(R) and NMA(R) Systems. Corrigent's CM-100 is the first packet ADM to complete the OSMINE process for Heritage OSS support, which will help enable the U.S. RBOC's to leverage the advanced capabilities of the Corrigent product line using their existing, deployed OSS systems.

Corrigent's CM-100 was designed to leverage the existing operational "look and feel" of a SONET ADM. By doing this, Corrigent has developed a solution that not only offers easy integration for service providers, but also enables the rich data functionality of the CM-100 to be managed within the rigid infrastructure of the Heritage OSS's

The OSMINE process helps enable compliance with existing operational support systems (OSS) deployed in ILEC networks. TIRKS is an integrated system for network provisioning, and provides inventory management of facilities and equipment. The NMA system enables network monitoring and operational surveillance. Completion of the OSMINE process is a requirement prior to the deployment of network equipment by most RBOC's.

"The OSMINE process is a vital step for any equipment vendor planning to sell its products to large, incumbent service providers," said Dennis Tinley, vice president, Customer Solutions, Telcordia Technologies, Inc. "By completing the OSMINE Services process, Corrigent is further illustrating its commitment to the ILEC market and is helping to ensure that the CM-100 integrates easily and is compatible with existing networks."

The OSMINE process includes the base level of functionality originally deemed necessary for the RBOC's, supporting only OC48 capacity and basic ADM connectivity. In order to offer a superior, carrier class solution to RBOC's, Corrigent has gone one step further by completing further enhancements beyond the basic OSMINE services process through support for the Hybrid and OC192 generic feature development services (GFDS).The Hybrid GFDS feature allows RBOC's to use Corrigent's distributed cross connect functionality to groom traffic efficiently between all interfaces, while the OC192 GFDS feature allows Service Providers to manage 10 Gbps systems.

"Corrigent has been working with Telcordia Technologies for two years and is committed to further developing its relationship," said Shane Eleniak, vice president of product management and sales, Corrigent Systems.

About Corrigent Systems

Corrigent Systems leads a new class of metro-optical transport products that is revolutionary in its economics. Corrigent's CM-100 is a packet-ADM that fuses together SONET/SDH technologies such as Virtual Concatenation, GFP, and LCAS, with packet technologies such as RPR, Ethernet and MPLS, to evolve today's SONET/SDH-based transport infrastructure to the next generation packet-based transport network, in both a standards-based and interoperable manner. This breakthrough architecture solves the metro dilemma for service providers worldwide by allowing them to bridge their existing SONET services with next-generation data, voice and video services. Corrigent is based in San Jose, with an R&D center in Israel. Orckit Communications (NASDAQ:ORCT) is a majority shareholder of Corrigent. For more information visit Corrigent at: www.corrigent.com.

Corrigent Systems and CM-100 are registered trademarks of Corrigent Systems, Inc. All other Brands and products referenced herein are the trademarks or registered trademarks of their respective holders. Certain matters discussed in this release are forward-looking statements that involve risks and uncertainties. Readers are cautioned that forward-looking statements may differ significantly from actual future events or results. Corrigent assumes no obligation to update the information in this release.