http://www.networkworld.com/news/2013/031213-att-data-connectio
According to a statement from the OFC/NFOEC organizers, AT&T was able to
send 400Gbps data transmissions more than 7,456 miles with minimal loss,
thanks to new materials and a new modulation technique. Team leader Xiang
Zhou said that his setup addresses several key concerns for next-generation
networks.