TOKYO/BARCELONA, Spain -- Japanese telecommunication rivals NTT and KDDI will collaborate in developing technology for ultra-energy-efficient networks that use light to transmit signals from communication lines to servers and semiconductors.
Telecom operators combine technologies, aiming to cut power use by 99%

A technology KDDI came up with while developing large-capacity submarine cables might help rival NTT speed up the development of highly efficient, next-generation transmission infrastructure. (Source photos by Nikkei and AP)
TOKYO/BARCELONA, Spain -- Japanese telecommunication rivals NTT and KDDI will collaborate in developing technology for ultra-energy-efficient networks that use light to transmit signals from communication lines to servers and semiconductors.