OPTICAL REMOTE MULTIPLEX TRANSMISSION SYSTEM FOR SUBSCRIBER LINE

摘要

PURPOSE:To prevent the deterioration in S/N and to eliminate the need for synchronization establishment time in a remote equipment by assigning different n-set of wavelength to each subscriber transmission optical signal. CONSTITUTION:Optical transmission circuits 24-1-24-n of wavelengths lambda21-lambda2n assigned to each subscriber are provided respectively to subscriber equipments 51-5n and the optical signal with a wavelength assigned to each subscriber from the optical transmission circuits 24-1-24-n is sent to a remote equipment 3. The remote equipment 3 synthesizes optical signals sent from each subscriber by an n:1 optical star coupler 26 and sends the result to an intra-office equipment 1 as it is. The equipment 1 uses an optical demultiplexer 9 to multiplex the subscriber transmission optical signal sent from the remote equipment 3 into each subscriber transmission optical signal and the signal is received by reception circuits 27-1-27-n corresponding respectively to each subscriber and the optical signal is converted into an electric signal. Moreover, the optical signal sent from the equipment 1 to the subscriber is processed similarly as a conventional system.