Patent ID: 9240855
Filing Date: 2016-01-19
CPC Classification: G01M,H04B,H04J,H04Q

Claim Text:
1. An apparatus, comprising: an optical line terminal (“OLT”) including transceivers each for coupling to a corresponding one of a plurality of point-to-point fiber links of a fiber-to-the-premise (“FTTP”) network; an optical time domain reflectometry (“OTDR”) unit to generate an optical test signal and to receive test signal reflections for obtaining OTDR measurements from the FTTP network; and a test signal distribution unit coupled to the OLT and the OTDR unit to selectively multiplex the optical test signal from the OTDR unit onto the point-to-point fiber links, coupled to intercept the test signal reflections prior to reaching the OLT and direct the test signal reflections back to the OTDR unit, and coupled to pass optical data signals between the FTTP network and the OLT, wherein the test signal distribution unit comprises: a plurality of optical splitters coupled between the second ports of the optical switch and the third port of the 3-port optical couplers, each of the optical splitters coupling a subset of the point-to-point fiber links to a given one of the second ports of the optical switch.