Whether TN52ND2 can substitute for TN12ND2

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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.

Other related questions:
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.

Whether TN53ND2 can replace TN52ND2
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.

Whether 62PQ1A01 can substitute for 61PQ1A01
Yes, 62PQ1A01 can substitute for 61PQ1A01 on the Metro 3000.

Whether E2OBU03 can substitute for E2OBU01
Query the performance counters of boards: E2OBU01: C-band optical power amplifier with 20 dB gain E2OBU03: C-band optical power amplifier with 23 dB gain According to the product documentation, the following conclusions are drawn: 1. E2OBU03 can substitute for E2OBU01. E2OBU03 actually has slightly larger noise than E2OBU01, but the small difference does not affect the system and therefore can be ignored. That is why E3 series amplifiers retain only 0BU03 and OBU05 rather than OBU01. 2. For E2OBU01, the gain is 20 dB and the single-wavelength nominal input optical power in a 40-wavelength system is �?6 dBm. For E2OBU03, the gain is 23 dB and the single-wavelength nominal input optical power in a 40-wavelength system is �?9 dBm. When E2OBU03 substitutes for E2OBU01, ensure that the single-wavelength nominal input optical power of E2OBU03 is 3 dB lower than that of E2OBU01. After board substitution, the input optical power values of the OBU boards must be adjusted to appropriate values.

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.

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