Patent ID: 7239627

Claim:
A system for extending the effective distance of digital subscriber line service, the system comprising: a central office terminal, the central office terminal including: a data interface; and a plurality of line units; at least one communication link, coupled to one of the plurality of line units, that carries signals using digital subscriber line service, wherein each communication link is a twisted pair; at least one remote access multiplexer, coupled to the at least one communication link, wherein the at least one remote access multiplexer includes a plurality of ports that are adapted to provide digital subscriber line service; the remote access multiplexer adapted to multiplex signals between the plurality of ports and the at least one communication link; and wherein the at least one remote access multiplexer is located at a distance from the central office terminal so as to provide digital subscriber line service to user terminals that are located more than 12 kilofeet from the central office terminal.