A lawyer for Verizon Communications Inc. on Monday pressed the company's fight with federal regulators, arguing that a government scheme to promote an open Internet is unconstitutional.

Verizon's lawyer, Wiley Rein partner Helgi Walker, told a three-judge panel of the U.S. Court of Appeals for the D.C. Circuit that the Federal Communications Commission overstepped its authority in adopting so-called "net neutrality" rules in December 2010 to try to prohibit barriers to infrastructure development.