Hige capacity transmission and capacity of modular upgrade It supports 96 wavelength 10G system transmission at C band It supports a access rate of up to 100Gbit/s for single channel It supports a single level multiplexing/demultiplexing architecture for 80/96 wavelength, without the need of OCI to implement multiplexing/demultiplexing for 80 wavelength It supports a system expansion for 40/48->80/96 wavelength and also a modular expansion for 10G->100G, which ensures the low investment in the early stage of the network construction and the smooth expansion in the late stage, so as to meet the future growing demand in bandwidth