N2X is a 20G OTN muxponder card based on STN6200 platform. It adopts the advanced technology and ASIC chip, and it is fully compliant with ITU-T standard, such as ITU-T, G.709, G.798, etc. STN6200-N2X is suitable for Metro Access and Metro Aggregation optical transport network. The system side of N2X supports 2-port OTU2/OTU2e, and the client side supports 2-port 10G Ethernet, SDH, OTN. The N2X board can be used for the centralized cross service of the STN6200-VE equipment, and can be used as a 10G line card with a centralized cross tributary card with a rate of 10G and below.