Patent ID: 7787768
Filing Date: 2010-08-31
Classification: H04Q

Abstract:
1. An optical cross-connect (OXC), comprising: a) a plurality of input channels for through traffic; b) a plurality of output channels for the through traffic; c) a first group of optical switching matrices for connecting each through traffic input channel to any of the through traffic output channels, each through traffic input channel being connected to an input of a switching matrix of the first group, and each through traffic output channel being connected to an output of the switching matrix of the first group; and d) a third plurality of input channels for adding traffic, each add traffic input channel being connected to an input of a second group of switching matrices, wherein outputs of the second group of switching matrices are connected to inputs of a third group of switching matrices, and outputs of the third group of switching matrices are connected to inputs of the first group of switching matrices such that the switching matrices of the second, third and first groups form a Clos network.