In this document, we determine that US West may not avoid the obligations placed on incumbent LECs under section 251(c) of the Act in connection with the provision of advanced services. We find that when xDSL-based advanced services both originate and terminate "within a telephone exchange," and provide subscribers with the capability of communicating with other subscribers in that same exchange, they are properly classified as "telephone exchange service." We also find that xDSL-based advanced services constitute "exchange access" when they provide subscribers with the ability to communicate across exchange boundaries for the purposes of originating or terminating telephone toll services.