Fiber Network Provides Attractive Alternative for Enterprise and Carrier Customers

HERNDON, VA – June 16, 2008 – RCN Metro Optical Networks, a division of RCN Corporation (NASDAQ: RCNI) and a premier provider of fiber optic-based network solutions, announced the launch of their Chicago network. RCN Metro Optical Networks just completed the build of a fiber ring encompassing over 10 route miles located in downtown Chicago to augment the existing 538 mile fiber network RCN already has in the Chicago area. This gives RCN Metro a robust footprint and capabilities right in the heart of Chicago.

“Increasingly, customers are seeking alternative carriers who can provide the high levels of service, reliability, and QoS parameters that are required to support today’s applications. RCN Metro is delighted to announce this latest market expansion and be able to support Chicagobased businesses,” said Felipe Alvarez, President of RCN Metro Optical Networks.

RCN Metro’s complete set of products is now available in the Chicago market, ranging from Metro Ethernet to SONET and Wavelength services, IP transit, Colocation and Network Management Services. With this expansion, RCN Metro will add an additional 100 Gigabits of overall network capacity in a core growth market.

“With approximately 80 buildings lit, including major meeting points for the financial services industry and service provider points of presence, RCN Metro is offering highly reliable services deployed over a network that is diverse from other carriers’ networks,” said Lorin Dorco, Chicago Regional Director for RCN Metro. “Our services are backed by an exceptional operational infrastructure and customer-focused support teams.”

In March, RCN Metro completed its Philadelphia, PA build and launched its fiber ring, encompassing over 3,000 fiber miles, in Center City, Philadelphia, giving the business expanded capabilities to meet growing customer demand.

About RCN Metro Optical Networks

RCN Metro, http://www.rcnmetro.com, is a premier provider of high-capacity transport services for carriers as well as large and medium-sized businesses. RCN Metro offers a comprehensive suite of services including: Ethernet, SONET, Wavelength, Video Transport, Internet and more.  With a network leveraging unique rights-of-way, spanning from Maine to Virginia and out to Chicago, RCN Metro deploys custom solutions to service providers as well as companies in the finance, hospitality, media, government, health care and education industries. RCN Metro is a wholly owned division of RCN Corporation.

About RCN Corporation

RCN Corporation, http://www.rcn.com, is a facilities-based, competitive broadband telecommunications services provider delivering digital television, high-speed data and voice services to residential and small-medium business customers under the brand names of RCN and RCN Business Services, respectively. RCN’s primary service areas include Washington, D.C., Philadelphia, Lehigh Valley (PA), New York City, Boston and Chicago. (RCNI-G).