Williams Communications to provide network capacity to Progress Telecom and Corvis Corp.

Oct. 17, 2001--Williams Communications (NYSE: WCG), a broadband provider for bandwidth-centric customers, has signed an agreement with Progress Telecom to provide network capacity. In addition, Corvis Corporation, a provider of intelligent optical networking solutions, and Williams have established a new standard for speed in the delivery and provisioning of bandwidth.

Williams Communications (NYSE: WCG), a broadband provider for bandwidth-centric customers, has signed an agreement with Progress Telecom to provide network capacity and has turned up an OC-192 optical wave in 27 days end-to-end. Williams Communications claims to be the first provider to offer on-net Wave Services over an OC-192 wave local loop.

Under the terms of the agreement, Williams Communications is providing Progress Telecom broadband transport services including OC-192 Optical Wave Service and local distribution to complete a fully diverse route from New York to Washington, D.C. for Progress Telecom. Wave Services transport traffic between two locations and offer flexible high bandwidth capacity without the capital cost of dark fiber.

The OC-192 represents an enhancement to an already robust metro service offering released earlier this month. Williams Communications' new Metro Access Services provides DS-3 through OC-48 private line and OC-48 optical wave services to high bandwidth locations in 17 cities nationwide. Williams Communications utilized its existing ONLINE9000 transport platform by ONI Systems Corp. for the metro portion of the Progress Telecom circuit, with the Corvis CorWave family of products to enable the long haul transport. OC-192 services were developed for Progress Telecom and will be generally available first quarter 2002.

In addition, Corvis Corporation (NASDAQ: CORV), a provider of intelligent optical networking solutions, and Williams have established a new standard for speed in the delivery and provisioning of bandwidth. Using Corvis' next-generation optical solutions, Williams Communications provisioned an OC-192 circuit from New York City to Washington, DC within 48 hours of receiving the equipment. Williams Communications will use this 10 Gbps high-traffic circuit to deliver wavelength services to their customers.

Corvis' OC-192 solution offers distinct advantages over traditional networking products by eliminating stranded capital and enabling carriers to quickly turn up bandwidth. The Corvis network is inherently bandwidth ready, eliminating pre-provisioning of expensive 10 Gbps electronics and optics at regeneration and switching sites.

Leveraging its optical design, Corvis facilitates rapid circuit turn up using fast end-to-end provisioning software and dynamic optical gain flattening. Together these features, coupled with the long unregenerated reach of the Corvis system, eliminate unnecessary and costly truck rolls to intermediate regeneration and switching sites along a circuit path.

Previously, Williams Communications achieved 6,400 km transmission without electrical regeneration along a portion of the Williams Multi-Service Broadband Network.

About Williams Communications Group:

Based in Tulsa, Okla., Williams Communications Group, Inc. is a broadband network services provider focused on the needs of bandwidth-centric customers. For more information, visit www.williamscommunications.com.

About Progress Telecom:

Founded in 1998, Progress Telecom is a carrier's carrier providing wholesale telecommunications services throughout the Eastern United States. For more information, visit www.progresstelecom.com.

About Corvis

Corvis Corporation is a provider of next-generation optical services networks. For more information, visit www.corvis.com.

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