Huawei together with China Mobile has completed successful tests on the first 400G Optical Transport Network (OTN) in China, the Chinese telecom giant announced today.

The success of the tests showcase Huawei's leading role in ultra-high speed transport technology and promotes the commercialization of 400G OTNs, the telecom company said in a statement.

To meet the increasing bandwidth demands in cloud computing, media streaming and LTE services, Huawei worked with China Mobile, one of the leading Chinese operators in researching beyond 100G technologies, to begin testing 400G technology in early 2014.

"To help customers manage increased digital traffic, Huawei took the lead in deploying 100G OTNs and have continued to invest in research and development for technologies beyond 100G," said Wang Weibin, President, Transport Network Product Line, Huawei. "We are delighted to see breakthroughs in core technologies testing that take us closer to commercial deployment of 400G OTNs, and especially in collaborating with China Mobile to test our latest OTN technology in China."

Huawei provided two 400G OTN solutions for the testing. Firstly, the large-capacity 400G OTN solution which is based on the PDM-16QAM (polarization division multiplexed 16-ary quadrature amplitude modulation) higher order coding scheme, a widely deployed 400G solution throughout the industry. Secondly, an ultra-long haul 400G OTN solution based on the PDM-QPSK (polarization division multiplexed quadrature phase shift key) coding scheme.