This article needs additional citations for verification. (August 2008)
AT&T CallVantage was a voice over Internet Protocol telephone service first offered in 2004 by AT&T Corp., upon the heels of its announcement that it would stop seeking traditional local and long-distance landline customers.
AT&T CallVantage competed with other VoIP providers, such as Vonage. When AT&T U-verse Voice was unveiled January 28, 2008, AT&T continued to market CallVantage to customers without U-verse, particularly customers outside AT&T's local phone service territory. However, AT&T suspended new business later in 2008 "to evaluate CallVantage service."
In a letter dated April 17, 2009, AT&T notified all existing CallVantage subscribers that the service would be discontinued and no longer available later in 2009, which occurred October 20, 2009.
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- Steve Taylor & Larry Hettick (January 30, 2008). "AT&T moves ahead with IMS, unveils VoIP service for its IPTV customers". Network World Convergence & VoIP Alert. Retrieved July 28, 2011.
- "AT&T's CallVantage Website". Archived from the original on July 6, 2008. Retrieved August 18, 2008.
- "AT&T halts CallVantage VoIP - is this the end of stand-alone consumer VoIP?". Archived from the original on 26 August 2008. Retrieved August 26, 2008.
- Taylor, Steve; Larry Hettick (April 22, 2009). "AT&T expands its contact center portfolio". Network World. Archived from the original on 25 April 2009. Retrieved 2009-04-22.