US Patent Issued to Nippon Telegraph and Telephone on Aug. 12 for "Optical communication system, control method and optical subscriber line terminal apparatus" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,389,141, issued on Aug. 12, was assigned to Nippon Telegraph and Telephone Corp. (Tokyo).

"Optical communication system, control method and optical subscriber line terminal apparatus" was invented by Haruka Nagoshi (Musashino, Japan), Hiroaki Katsurai (Musashino, Japan) and Tomoaki Yoshida (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aspect of the present invention is an optical communication system in which an optical line terminal and an optical network unit are connected by an optical communication line, in which when receiving a first activation signal from the optical line terminal in a sleep state, the optical network unit e...