An Integrated Broad-Band Distribution System Using Demand Assignment

An integrated distribution system is proposed that provides switched video, data, and telephony on a single analog broadband facility, using the concept of demand assignment. A reduced capability broad-band distribution system, based on the same principles and using coaxial cable, can be implemented in the near term to provide only the switched video and interactive data capabilities. Cost estimates are presented for this reduced capability system that are almost an order of magnitude lower than was previously thought possible for low-usage receive-only switched video service. It is expected that telephony con be added economically to this reduced capability system, as digital switching of telephony becomes practical. A brief discussion of the implications of this system approach for optical fiber systems is also given.