AT&T is expanding its Voice Over Internet Protocol (VoIP) phone services offerings to both Atlanta and Chicago.

The CallVantage service was launched by AT&T in March and is now available in 36 markets. The company is shooting for deployment in 100 markets by year’s end.

The service requires that customers have high-speed Internet access and includes a variety of features, such as personal conferencing for up to 10 callers.

For details, see: