Optical system for connecting customer premises networks to a switching center of a telecommunication network providing interactive and non-interactive services

Claim 1

An optical system for connecting customer terminals to a telecommunication network providing interactive and non-interactive services, said system comprising: a connection network; a plurality of central office termination devices, each comprising an optical sender and an optical receiver which are tuned to the same wavelength, which is different for each central office termination device, at least one of said central office termination devices being chosen as a control central office termination device; a plurality of customer premises networks, each comprising an optical sender and an optical receiver which are tuned to the same wavelength, which is variable, the wavelength of the receiver being set to the wavelength of said control central office termination device when a customer premises network is not communicating with an interactive service; an optical distribution network connecting the optical senders of all of said central office termination devices to the optical receivers of all of said customer premises networks, and connecting the optical senders of all of said customer premises networks to the optical receivers of all of said central office termination devices; and control means for controlling the connection network and for assigning a different wavelength to each customer premises network; wherein said control means controls the connection network to connect the non-interactive services to said control central office termination device in order to send non-interactive service signals at the wavelength of said control central office termination device, and wherein each customer premises network comprises means for further receiving signals of at least one non-interactive service sent at the wavelength of said control central office termination device.