OPTICAL DISTRIBUTION NETWORK PROTECTION

摘要

A method for optical communication in a bidirectional optical communication network is proposed. The network comprises a plurality of optical line terminals which communicate with a plurality of optical network units over an optical distribution network. The optical distribution network comprises a plurality of optical filters controlled by a network controller. A first optical line terminal sends a request for optical communication with at least one optical network unit to the network controller. The request is sent over the optical distribution network and indicates an operating wavelength of the first optical line terminal and of the at least one optical network unit. The network controller configures at least two of said optical filters to allow a passing through of said operating wavelength or of a further operating wavelength. Finally the optical communication between the first optical line terminal and the at least one optical network unit in said operating or in said further operating wavelength is established through said optical filters.