Description: This is the windowSize corresponding to the given packet size and throughput class. All Vcs using the windowSize matrix support large Vc windows on both ends of the Vc, and support the signalling of the chosen Vc window size from the destination (called) end to the source (calling) end. This is the only matrix supported. The windowSize should be configured in the same way network wide, though it can be upgraded on a module by module basis. Vcs using the windowSize matrix will run properly if the matrices on different nodes differ since the Vc window is selected by the destination (called) side of the Vc.