"Following its review of the evidence, the five-person NARB panel recommended that Frontier discontinue claims that communicate a message that Frontier's "dedicated" Internet connection is faster or more reliable than cable," the board said in a statement.
The board also recommended that Frontier discontinue claims that communicate a message that Frontier DSL provides superior privacy and security compared to cable.
The panel also scrutinized Frontier radio ads that implied cable Internet providers don't have a 100 percent U.S.-based workforce or local managers.
While Suddenlink was bought out last year by a group of investors that included the Canada Pension Plan Investment Board, the NARB found that both Frontier and Suddenlink both have 100 percent U.S.-based workers.
The board also said Suddenlink has local managers in areas where it competes with Frontier.
The panel said Frontier should discontinue claims implying cable providers do not have an all-U.S. based workforce unless they can show a significant portion of cable providers in areas where the advertisement is disseminated do not.
Frontier spokesman Dan Page said that while the company disagrees with the NARB's analysis and conclusions, it "intends to take into consideration the panel's recommendations in developing future high-speed Internet advertisements."
"We are determined to compete rather than complain about other companies - especially a Canadian-owned cable company like Suddenlink," Page said.
Page also said it wasn't surprising Suddenlink filed the complaint "because cable companies know they are losing market share to Frontier and our superior services, which are the result of our huge investment in West Virginia."
Contact writer Jared Hunt at busin...@dailymail.com or 304-348-4836.