Abstract: A dust-proof and shading adapter comprises a frame and shading components, an interior of a front end of the frame is formed with horizontally arranged chambers having upward openings, an front end of each chamber is provided with a port, each chamber is equipped with one of the shading components that comprises a hook piece and a baffle, wherein, the side walls of the chamber are provided with guide rails that restrict the vertical sliding movement of the baffle, wherein, the guide rails are arcuate and are curved outward towards the opening of the chamber, the bottom of the guide rails align with the bottom of the port, and the upper end of the hook piece is hinged to the middle of the upper surface of the chamber, while the lower end of the hook piece is interlocked with the baffle through hinged engagement.

Abstract: An optical fiber grating tracker includes a first stub, a second stub, an optical fiber grating, and a connection part. The connection part has a through hole. The first stub is inserted into one end of the through hole. The second stub is inserted into the other end of the through hole. An interval exists between the first stub and the second stub. The optical fiber grating is in the through hole and in the interval. A space in the through hole is filled with a waterproof material. The optical fiber grating tracker and the method for detecting an optical fiber line fault can detect an optical fiber fault from an optical fiber truck to the optical fiber grating tracker through an optical splitter, and meanwhile do not affect normal communication of an original optical communication network.

Abstract: An optical fiber grating tracker includes a first stub, a second stub, an optical fiber grating, and a connection part. The connection part has a through hole. The first stub is inserted into one end of the through hole. The second stub is inserted into the other end of the through hole. An interval exists between the first stub and the second stub. The optical fiber grating is in the through hole and in the interval. A space in the through hole is filled with a waterproof material. The optical fiber grating tracker and the method for detecting an optical fiber line fault can detect an optical fiber fault from an optical fiber truck to the optical fiber grating tracker through an optical splitter, and meanwhile do not affect normal communication of an original optical communication network.