Whether TN53ND2 can replace TN52ND2

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The TN53ND2 board can be created as 52ND2 or 52ND2 (STND) on the NMS to substitute for the TN52ND2 board without the need of a software upgrade. The substitute board provides only functions of the substituted TN52ND2 board.
The TN53ND2 does not support OTU2e services at a rate of 11.3 Gbit/s on the WDM side, and it cannot substitute for the TN52ND2 board.

Other related questions:
Whether TN52ND2 can substitute for TN12ND2
TN12ND2/TN52ND2 can be created as ND2 on the NMS to substitute TN11ND2. The board substitution does not require software upgrade. After the substitution, the board can function as TN11ND2 only. When both the transmit and receive boards use FEC encoding, they can substitute for each other. When both the transmit and receive boards use AFEC encoding, they cannot substitute for each other. The TN52ND2 board can substitute for the TN11ND2 board only when they use 800ps/nm-C band-tunable wavelength-(D)RZ-PIN optical modules.

Reason why the WDM-side signals of the TN12LOG board can be regenerated by the TN12ND2/TN52ND2/TN53ND2/TN53NQ2/TN54NQ2 board
WDM-side signals of the TN12LOG board can be regenerated by the TN12ND2/TN52ND2/TN53ND2/TN53NQ2/TN54NQ2 board because they have the same FEC type.

Whether TN52SCC can replace TN51SCC
Yes, but the board software needs to be upgraded.

Whether a TN53ND2 board can substitute for a TN12ND2 board on an OSN 8800
A TN53ND2 board can substitute for a TN12ND2 board but cannot substitute for a TN11ND2 board.

Methods for identifying whether the wavelength of a TN53ND2 board is tunable
Query the board manufacturer information and check the description of the module. "Tunable" indicates that the wavelength of the optical module is tunable. The queried specific wavelength information indicates that the wavelength is fixed.

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