Though its plans cost a bit more than those of competing VoIP services, AT&T CallVantage stands out for its consistently strong call quality and long list of features.
Pricing not available
AT&T is shutting of its voice over IP service called CallVantage.
A cheat sheet for defensive computing.
VoIP number portability problems
What looks good in broadband news for March 8.
New and Noteworthy: For 9, a lifetime of Internet phone calls; OS competition good for IT
AT&T looks again to cable as its savior.