Several months after AT&T Inc. (T) confirmed it’s no longer taking new customers for its CallVantage VoIP service, customers of the four-year-old offering are still in limbo, with the telco yet to post any news updates on its Web site.While consumer users seem to be directed by AT&T to its nascent U-verse VoIP service, and medium-to-large enterprises directed to a line ... (206 words)

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