Huawei OptiX OSN 1800 V chassis, supports full-granularity cross-connections and multiplexing (only Z-series cross-connections support ODU3), a maximum of 700 Gbit/s OTN capacity, 700 Gbit/s packet capacity, 280 Gbit/s SDH higher-order and 40 Gbit/s SDH lower-order capacities, and supports ODUk (k = 0, 1, 2, 2e, 3, 4, C2, flex)