Optical grooming is the configuration of logical wavelength routes, realized by optical cross-connection. This function meets the user's requirement of managing the services at the optical layer.
There are two schemes supported by the WDM equipment for wavelength allocation:
- Fixed optical add/drop multiplexer (FOADM)
- Reconfigurable optical add/drop multiplexer (ROADM)
FOADM cannot reconfigure the wavelength allocation based on the requirements of service development. The ROADM realizes the reconfiguration of wavelengths by blocking or cross-connecting wavelengths, changing the static wavelength allocation to
a flexible and dynamic operation. Making use of the ROADM technology, the
U2000 Web LCT software adjusts the status of wavelengths (add, drop or pass-through) to realize remote and dynamic
adjustment of wavelength status.
The OptiX OSN 6800A/3800A/8800 T32(NA)/8800 T64(NA) provides flexible optical grooming. A maximum of 80 wavelengths can be adjusted. When there are changes in the services, users need only to make configuration accordingly on the U2000 Web LCT.
Different nodes adopt different methods of optical grooming. The three main methods are listed as follows:
- WSD9 + RMU9 (WSM9): Mainly applied to inter-ring nodes and suitable for multi-dimensional grooming. It supports the grooming of at most eight dimensions.
- WSMD4 + WSMD4: Mainly applied to inter-ring nodes and suitable for the grooming in no more than four dimensions.
- WSMD2 + WSMD2: Mainly applied to inter-ring nodes and suitable for the grooming in no more than two dimensions.
- ROAM: Applied to common nodes and suitable for two-dimensional grooming.
For more details of optical grooming, refer to the Product Description.
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