Patent ID: 9020349
Filing Date: 2015-04-28
Classification: G01M,H04B,H04J

Abstract:
1. An arrangement at a Remote Node in a Wavelength Division Multiplexed Passive Optical Network (WDM-PON) configured for supervision of the WDM-PON, wherein the Remote Node is connected to a Central Office by two individual feeder fibre links, the arrangement comprising: at least one filter connected to the feeder fibre links and configured to separate a data signal and an original Optical Time Domain Reflectometry (OTDR) signal received on either of the feeder fibre links; and a first splitter configured to receive from the at least one filter the original OTDR signal, to split the original OTDR signal into a plurality of OTDR sub-signals, and to output to an N*M Arrayed Waveguide Grating (AWG) said plurality of OTDR sub-signals, wherein N indicates a number of individual inputs and M indicates a number of individual outputs, and wherein the at least one filter is further configured to output the original OTDR signal to the first splitter and to output the data signal to the N*M AWG, thereby enabling supervision of the WDM-PON without influencing the data signal.