Patent ID: 7577355
Filing Date: 2009-08-18
Classification: H04J

Abstract:
1. Optical path cross-connect equipment connected to a ring network comprising: a first optical path for optical signals to be added to the ring network; second, third, fourth, and sixth optical paths, which are connected to the ring network; a fifth optical oath for optical signals to be dropped from the ring network, a first to third optical branching devices for branching each the first to third optical path into two optical paths; and a first to third optical path cross-connect switches connected to the fourth to sixth optical paths for selecting one input out of the two optical paths to output to the fourth to sixth optical paths, respectively, wherein the first optical path cross-connect switch selects one of the first and second optical paths respectively branched by the first and second optical branching devices, to connect to the fourth optical path, the second optical oath cross-connect switch selects one of the second and third optical paths respectively branched by the second and third optical branching devices to connect to the fifth optical path, and the third optical path cross-connect switch selects one of the first and third optical paths respectively branched by the first and third optical branching devices to connect to the sixth optical path, and wherein an input of the first branching device corresponds to the first optical path for optical signals to be added, an input of the second branching device corresponds to the second optical oath forming the ring network, an input of the third branching device corresponds to the third optical path forming the ring network, an output of the first optical path cross-connect switch corresponds to the fourth optical oath forming the ring network, an output of the second optical path cross-connect switch corresponds to the fifth optical path for optical signals to be dropped, and an output of the third optical path cross-connect switch corresponds to the sixth optical path forming the ring network.