EarthLink next month will shut down its Philadelphia Wi-Fi network, the flagship of its now-dashed municipal wireless initiative, and then remove it from the city's street lights.

The ailing service provider made the announcement Tuesday, saying it is proceeding with that plan after months of negotiations with the city and a nonprofit that had planned to offer free Wi-Fi on the network. The deal fell apart because of a disagreement among the city, the nonprofit and the group Wireless Philadelphia, EarthLink said. The carrier will provide a 30-day transition period, finally shutting down the network on June 12, and offer its Wi-Fi subscribers discounts on other EarthLink services.

Unless a deal to hand over the network can be salvaged, it will be a somber ending to the project that put municipal Wi-Fi on the map in the U.S. just three years ago. Philadelphia's plan in 2005 to build the nation's largest municipal Wi-Fi network, spanning 135 square miles (350 square kilometers), drew fire from Verizon Communications, which charged it was unfair to use tax dollars to create a network that would compete with private service providers.

Under EarthLink's winning proposal for the project, the carrier financed, built and operated the network at no cost to taxpayers, sharing revenue with Wireless Philadelphia. The idea was to make Wi-Fi available to residents and businesses throughout the city, reaching areas the city said didn't have broadband, and to offer the service at a subsidized rate to low-income residents to bring them online.

But there were delays in rolling out the network and it never gained much traction. In court papers filed Tuesday, EarthLink said it had only 5,034 regular residential and business subscribers and 908 customers under the subsidized plan. EarthLink said it knew by late 2007 that the business was unsustainable.

EarthLink's other municipal Wi-Fi networks also failed to deliver, and the company started shutting down its municipal Wi-Fi unit last year. Since then it has given networks back to cities including Corpus Christi, Texas, and Milpitas, California. The company offered to give the Philadelphia network to the city or the unnamed nonprofit for free, after which the nonprofit would offer free service, according to EarthLink. Representatives of the city and Wireless Philadelphia were not immediately available for comment.

The IDG News Service is a Network World affiliate.