Patent ID: 9042723
Filing Date: 2015-05-26
Classification: G01M,H04B

Abstract:
1. An apparatus for fault discovery in a Passive Optical Network, comprising: a multistage power splitter comprising a first stage including at least one 1:N splitter followed by a second stage including N items of 2:M splitters, wherein N and M are integers greater than 1; and an Optical Time Domain Reflectometry (OTDR) device configured to insert an OTDR signal into the power splitter, and adapted to insert the OTDR signal between the first stage including at least one 1:N splitter and the second stage of N items of 2:M splitters; wherein the OTDR device is connected to an Optical Switch (OS) or a Wavelength Division Multiplexor (WDM) having one input connected to the output of the OTDR device and N*K outputs connected to the inputs of the N items of 2:M splitters, wherein K is a number of Optical Line Terminals (OLT).