ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,877, issued on Feb. 3, was assigned to NTT Inc. (Tokyo).
"Optical transmission line test equipment and test method" was invented by Atsushi Nakamura (Musashino, Japan), Tomokazu Oda (Musashino, Japan) and Yusuke Koshikiya (Musashino, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An object of the present invention is to provide an optical transmission line test apparatus and a test method capable of measuring a cumulative crosstalk of an optical transmission line in which a plurality of uncoupled multi-core fibers are connected in series from one end side with an OTDR.An optical transmission line test apparatus 301 according to the present inve...