Optimum Lightpath Connects 2,000th Fiber-Lit Building to Its New York Metro Area Network.

Mack-Cali Building in Suburban New Jersey is Latest to Benefit from Reliable, Facilities-Based Fiber Connectivity

JERICHO, N.Y. -- Optimum Lightpath, the next-generation business broadband service provider of Cablevision Systems Corporation (NYSE: CVC), today announced that its network is now connected to 2,000 fiber-lit buildings in the New York metropolitan area. Optimum Lightpath achieved this milestone with the "lighting" of a Mack-Cali Realty Corporation (NYSE:CLI) building in Woodcliff Lake, New Jersey.

"One of Mack-Cali's objectives is to provide our tenants with the capacity, bandwidth and speed of fiber connectivity," commented Christopher DeLorenzo, vice president of leasing, Mack-Cali Realty Corporation. "Adding Optimum Lightpath's all-fiber network to this building allows us to accomplish this objective."

The Optimum Lightpath network now comprises more than 2,500 route miles of fiber optic cable (nearly 128,000 miles of actual fiber) within the New York metropolitan area, encompassing New York City, and the suburban areas of Long Island, Westchester County, Northern New Jersey and Southern Connecticut.

"Optimum Lightpath's success in surpassing this milestone is a direct result of the strong demand by medium-sized and larger businesses for full fiber optic connectivity, and the Mack-Cali building is the latest example of the advantages of the technology we can provide," said Dave Pistacchio, executive vice president and general manager, Optimum Lightpath. "Our business strategy is to bring Metro Ethernet services to businesses wherever they're located, and this full-market approach has fueled Optimum Lightpath's strong growth in each of the last two years."

For Optimum Lightpath, the significance of lighting 2,000 buildings is underscored by the fact that fully fiber optic connections are not generally available to the large number of businesses and branch offices in suburban areas. According to Vertical Systems Group, a networking industry market research firm, direct "local loop" fiber connectivity to commercial buildings with more than twenty employees nationwide has been measured at 11.7 percent. However, Optimum Lightpath is changing that imbalance by utilizing its state-of-the-art, all-digital optical network to bring the benefits of fiber optic connectivity to businesses located outside Manhattan.

Metro Ethernet simply and effectively provides organizations with the ability to link multiple locations, run bandwidth-intensive applications and converge multiple types of content over a single network. As a result, this emerging communications technology has the potential to transform how businesses operate and compete in today's economy.

Businesses interested in learning more about Optimum Lightpath's Metro Ethernet services can visit http://www.metroethernetnow.com or call 1-877-LIGHTPATH.

About Optimum Lightpath

Optimum Lightpath, a business telecommunications services division of Cablevision Systems Corporation, uses the power of its reliable and resilient fully fiber optic network to deliver converged data, Internet and voice solutions to businesses throughout the New York metropolitan area. Since its formation 18 years ago, Optimum Lightpath built an advanced fiber-to-the-business-premises network extending more than 2,500 route miles throughout the tri-state area. As a result of owning and maintaining this state-of-the-art network, Optimum Lightpath is able to reliably provide scalable, high-capacity IP-based Metro Ethernet services that support high bandwidth data, Internet and voice applications and optimize the enterprise customer's quality of experience - at lower prices than traditional offerings.

Optimum Lightpath has been recognized for eight straight years by the New York State Public Service Commission for delivering highly personalized customer service superior to the competition. Winner of the Metro Ethernet Forum's 2006 Service Provider of the Year Award for Outstanding Innovation, Optimum Lightpath became one of the first service providers in the world and the only North American MSO to earn Carrier Ethernet certification from the Metro Ethernet Forum in April 2006. For more information, visit www.optimumlightpath.com.

About Cablevision

Cablevision Systems Corporation is one of the nation's leading entertainment and telecommunications companies. Its cable television operations serve more than 3 million households in the New York metropolitan area. The company's advanced telecommunications offerings include its iO: Interactive Optimum digital television, Optimum Online high-speed Internet, Optimum Voice digital voice-over-cable, and its Optimum Lightpath integrated business communications services. Cablevision's Rainbow Media Holdings LLC operates several successful programming businesses, including AMC, IFC, WE tv and other national and regional networks. In addition to its telecommunications and programming businesses, Cablevision owns Madison Square Garden and its sports teams, the New York Knicks, Rangers and Liberty. The company also operates New York's famed Radio City Music Hall, and owns and operates Clearview Cinemas.