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AT&T CallVantage VoIP

The CallVantage service represents AT&T's expansion into the American Voice over IP communication market. It is part of the telephone giant's broadband and video division, known as Project Lightspeed.

Designed to capitalize on the growing popularity of VoIP, CallVantage was launched in 2004, and has been marketed as part of the AT&T Yahoo! DSL package, since AT&T merged with SBC in late 2005.