Huawei announced a prototype WDM platform capable of delivering 2 Tbps per-channel — a 20–fold increase over the 100G channels available today. Huawei has previously demonstrated 400 Gbps technology at trade shows earlier this year. 
The 2 Tbps channel rate is achieved by using intelligent digital signal processing and high performance adaptive-SD FEC technologies. Huawei claims that the 2T signals with 300GHz spectral width can transmit over a distance of 1,000 km without electrical regeneration when using G.652 fiber and common EDFAs.
The use of 2 Tbps channels expands the prototype WDM system capacity to 56 Tbps when utilizing wavelengths in both the C and L bands.
Huawei is also planning to use flex transceiver technology on this prototype WDM platform. This will enable software-defined OTN, allowing a programmable network controller to configure parameters such as the number of subcarriers, subcarrier spacing, modulation codes and FEC modes, thereby achieving flexible adjustments in areas including line rates, transmission distances and transmission capacity. Huawei describes this as programmable “resilient tunnels”. http://
