Patent ID: 9544669
Date: 2017-01-10
CPC Classifications: G01M,H04B,H04J,H04Q

Claim:
1. A remote node for a wavelength division multiplexing-based passive optical network, WDM-based PON, the remote node being connectable to multiple feeder fibers from one or more central offices, COs, of the WDM-based PON, the remote node comprising: one or more splitters each configured to receive a monitoring signal on a connected feeder fiber and to split the monitoring signal into split monitoring signals, wherein the monitoring signal uses one wavelength at a time out of a group of wavelengths; and an arrayed waveguide grating, AWG, coupled to the one or more splitters, provided with output ports, wherein the AWG is configured to receive the split monitoring signals, and to route the split monitoring signals to the output ports of said AWG based on a currently used wavelength of said group of wavelengths, for supervising drop fibers connected to the output ports.