Method and apparatus for ancillary data in a wavelength...

Details Method and apparatus for ancillary data in a wavelength... Method and apparatus for ancillary data in a wavelength...

H - Electricity

04

J

H04J 14/02 (2006.01) H04B 10/02 (2006.01) H04J 14/00 (2006.01)

Patent

CA 2288463

This invention provides method and apparatus for ancillary data in a wavelength division multiplexed (WDM) system. According to the invention, a low bit rate channel is provided over a amplitude modulated sub-carrier that is in turn used to amplitude intensity modulate an optical data signal that is output from a transmitter in the network. Data carried by the low bit rate channel can by used by another network element (NE) to determine the identity of the channel source, thereby allowing the NE to verify its connectivity to that source via the network. This invention is particularly useful in metropolitan optical networks (MON) where inexpensive methods of determining network connectivity are required.

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