Patent ID: 7468958
Filing Date: 2008-12-23
Classification: H04B

Abstract:
1. An optical line terminal (OLT) to be connected to a plurality of optical network terminals (ONTs) via a fiber, each ONT to have a timeslot during which data can be transmitted to the OLT, the OLT comprising: an interface unit to be connected to the fiber; an optical transmitter to generate and output downstream data packets to the ONTs via the interface unit; an optical receiver to receive upstream data packets from the ONTs via the interface unit, the upstream data packets having power levels; an optical power meter connected to the optical receiver to detect the power levels of the upstream data packets that are received during a sequence of transmission time slots, the optical power meter to output a plurality of measured power levels in response to detecting the power levels of the upstream data packets; and a processor connected to the optical transmitter, the optical receiver, and the optical power meter, the processor to: