Patent ID: 6144471
Filing Date: 2000-11-07
Classification: H04B

Abstract:
A system (SYS) for optically transmitting information from a subcenter (HUB) over a plurality of optical transmission lines to a plurality of optical network units (ONU), the system (SYS) comprising at least one means (K1, . . . , Km) for optically transmitting further information and at least one optical coupler (C1, C2, SP1, SP2, SP3, SP4, SP5, SP6, SP7), the further information of each of the means (K1, . . . , Km) being fed via a respective one of the optical couplers (C1, C2, SP1, SP2, SP3, SP4, SP5, SP6, SP7) into an optical transmission line connected to only part of the plurality of optical network units (ONU), characterized in that an optical signal distribution unit (VER) is provided for combining the information (CATV) and the further information (CABLE, NVOD, VOD) and then transmitting it together to the respective part of the plurality of optical network units (ONU), that the optical signal distribution unit (VER) comprises at least three optical couplers (SP1, SP2, SP3), at least two (SP2, SP3) of which have two input ports and two output ports, that the information (CATV) is applied to one (SP1) of the at least three optical couplers (SP1, SP2, SP3) which is connected to two of the at least two optical couplers (SP2, SP3) with two input ports, and that the further information (CABLE, VOD) is applied to at least one of the at least two optical couplers (SP2, SP3) with two input ports in order to combine it with the information (CATV) from the subcenter (HUB).