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OPTICAL NETWORKS

  • US 20100329680A1
  • Filed: 04/01/2008
  • Published: 12/30/2010
  • Est. Priority Date: 10/29/2007
  • Status: Abandoned Application
First Claim
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1. A communications node for providing communications services to at least one user, the node being arranged to transmit an optical signal comprising at least one Wavelength Division Multiplexing channel in a downstream direction, wherein at least one of the channels is an unmodulated channel which is further arranged to transmit user data from the at least one user in the upstream direction.

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