Article: Vonage, Verizon Wage War Over VoIP.(Vonage Holdings Corp., Verizon Communications Inc.)

By Ted Hearn

Washington-- Vonage Holdings Corp., a pioneer in placing phone calls over the Internet, was in federal court last week defending itself against a nearly $200 million patent-infringement suit filed by Verizon Communications, the second-largest phone company in the U.S.

Although Vonage made a name for itself as an innovator in digital voice communications, Verizon claims that Vonage has been illegally using patented Verizon technologies at the core of voice-over-Internet Protocol (VoIP) service, including signaling interconnectivity, authorization, authentication, billing and fraud prevention.

Verizon, defending five patents in U.S. ...

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