Does anyone have any experience with this technology? Is it MPLS? Do you know what type of equipment we would need at either end?
Per AT&T's website-
AVPN - AT&T's newest flagship offering allows customers to implement an MPLS-based network comprised of managed and unmanaged locations along with a plethora of added features such as Point-to-Point Protocol (PPP) and multicast.
You will need a router at each end unless they manage the router for you.
Hope that helps.