Cablevision said today that it has more than doubled the size of its Optimum Wi-Fi network, which was first deployed last month (story here).

The free wireless service now extends to locations across Long Island, Connecticut, and Westchester and Duchess counties in New York. It has also been activated on commuter rail platforms and station parking lots across Long Island, as well as on many Metro North station locations.

Cablevision said its Wi-Fi network is the largest and most advanced in the nation.

Current Optimum Online customers using laptop computers and portable Wi-Fi-enabled devices, such as the iPhone, iPod Touch and BlackBerry, can access Optimum Wi-Fi through a simple sign-on screen. Once a customer logs into the service by entering their Optimum User ID and password, the network delivers fast symmetrical speeds of up to 1.5 Mbps.

Earlier this month, Cablevision added Tim Farrell and Craig Plunkett to its wireless broadband product division (story here). Farrell was named vice president of wireless product development, while Plunkett was hired as vice president of wireless market development.

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