A transmission network system includes a head end for generating a downstream signal having a substantially expanded range of frequencies, a communication medium, such as a fiber optic cable and coaxial cable coupled to the head end section for routing the signal through the transmission network to a...http://www.google.com/patents/US20020174435?utm_source=gb-gplus-sharePatent US20020174435 - System, apparatus and method for expanding the operational bandwidth of a communication system
