Patent ID: 6567579
Filing Date: 2003-05-20
Classification: H04B,H04J

Abstract:
An optical local loop, comprising:a host digital terminal (HDT) operable to transmit a plurality of wavelengths in a downstream direction on a pair of optical fibers coupled thereto; one or more nodes coupled to said pair of optical fibers, wherein each of the nodes is operable to receive a different one of the plurality of wavelengths transmitted by the HDT and to transmit such wavelength back to the HDT on the pair of optical fibers; a first set of receivers disposed in said HDT, each for receiving a different one of the plurality of wavelengths on a first fiber of said pair of optical fibers corresponding to a particular node; a second set of receivers disposed in said HDT, each for receiving a different one of the plurality of wavelengths on a second fiber of said pair of optical fibers corresponding to a particular node; and a monitor coupled to said first and second set of receivers for comparing each one of the plurality of wavelengths transmitted by a particular node to the HDT on said first fiber to each one of the plurality of wavelengths transmitted by a particular node to the HDT on said second fiber.