Software-Defined Networking (SDN) is a concept for controlling a network via software.
 O3 (O Three) Project
O3 stands for the overall concepts of this project: open, organic and optimum.
 2013 September 17, Press Release
See the press release, "O3 Project launched for achieving the world's first wide area SDN."
PTN stands for packet transport network, which is a network in which telecommunications data are divided into small units called packets and transmitted in that form.
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Date: 07 March, 2014
Company: NEC Corporation, , Nippon Telegraph and Telephone Corporation, , NTT Communications Corporation, , Fujitsu Limited, , Hitachi, Ltd., , , , ,