Dedicated Entrance Facility (DEF) is a high capacity, point-to-point dedicated communications path that is available in a choice of bandwidths, and provides a direct SONET interface between service locations:

• Two node - customer premise and a local network service node

• Three node - customer premise, an AT&T local network service node, and another designated customer premise 

AT&T's DEF gives you a private connection into the AT&T network, bundling all your local services into one package and allowing you to customize the flow of communications between your agency's offices - establishing, for instance, a short-term, big-pipe connection to one site and a long-term connection to another. You literally create a custom network of varying bandwidths that specifically fit the diverse needs of your agency. Mileage-based, regional pricing applies for the service, and it is offered at the following bandwidth levels:

• OC-3
• OC-12
• OC-48
• Wavelength (beta trial)

How Does It Work?

AT&T DEF provides a channelized high capacity, dedicated communication path between your premises and the AT&T local node, or between your two premises and the AT&T local node.  It provides flexibility to connect to AT&T for access to AT&T core data and voice services, and also provides connectivity to other IXC POPs and Local Exchange carriers (2-Node DEF only). 

Where Is It Available? 

AT&T DEF is currently available on the AT&T Local Network in more than 67 Metropolitan areas in the U.S.