Carried out by researchers in Bell Labs in Villarceaux, France, the successful transmission of 16.4 Tbps of optical data over 2,550 km was assisted by Alcatel's Thales' III-V Lab and Kylia, an optical solution company. The researchers utilized 164 wavelength-division multiplexed channels modulated at 100-Gbps in the effort.

Pretty amazing..
Speed: Researchers Transmit Optical Data at 16.4 Tbps Over 1,500 Miles
Researchers transmit optical data at 16.4 Tbps - Networking - iTnews Australia