In this article, the difference between WBS and traditional wavelength routing is given and two types of multi-granularity optical cross-connect (MG-OXC) architectures are analyzed.

The optical switches and optical switch arrays, as key components in DWDM optical network, are used to implement the route selection, wavelength selection and optical cross-connect in optical layer.

In this paper we describe the basic design thoughts of a kind of cross connect system (LXM) used in optical access network.