Patent ID: 6490065
Filing Date: 2002-12-03
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:a subcenter (HUB) connected to a plurality of optical transmission lines connected to a plurality of optical network units (ONU); a plurality of separate input nodes (K1, . . . , Km) for optically transmitting further information; and a plurality of optical couplers (C1, C2) each connected to one of the nodes (K1, . . . , Km) and each located within a respective transmission line, wherein the further information of each of the nodes (K1, . . . , Km) is fed via a respective coupler (C1, C2) into the respective transmission line connected to only part of the plurality of optical network units (ONU), wherein at least one of the optical network units (ONU) is connected to the subcenter (HUB) by at least two different optical transmission paths containing different optical couplers, thereby redundantly transmitting information from the subcenter (HUB) to the at least one of the optical network units, and wherein each of the plurality of optical couplers (C1, C2) is located within only one of the optical transmission lines from the subcenter (HUB) to the plurality of optical network units (ONU), and wherein the further information comprises information in addition to the information from the subcenter (HUB).