From the introduction
The Vermont Supreme Court may soon consider whether federal law permits the Public Service Board to regulate certain voice-over-internet-protocol (VoIP ) services. Across the Hudson, Governor Andrew Cuomo recently sought to bar the New York Public Service Commission from adopting similar regulations. And these states are not alone: from Maine to Florida, several states are considering whether their jurisdiction over traditional telephone service encompasses this new technology, through which nearly one third of American landline households receive telephone service. If so, nationwide VoIP providers could face up to fifty new legal regimes with which they must comply before offering service. If not, consumer migration away from traditional telephone service could leave state regulators with little to regulate.
Lyons, Daniel A. "Technology Convergence and Federalism: The Case of VoIP Regulation" University of Michigan Journal of Law Reform Online April 19, 2012.