The service, called Ethernet Switched Service-Metropolitan Area Network, uses multiple access suppliers to connect the various offices of a business across a VPN.
Businesses can expect to connect their LANs at between 50 Mbps and 1 Gbps. The service also features a "self-healing" option that can provide continuous access to critical applications.
AT&T says the service is ideal for businesses that need to share high-bandwidth applications, such as streaming video and medical imaging. It's available now in 67 metropolitan areas and 90 cities across the United States.