Precautions for commissioning the TN12OBU1P board of OSN 8800

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The working principle of the TN12OBU1P1 board is as follows: The attenuation of the built-in VOA before the IN port on the TN12OBU1P1 board cannot be manually adjusted. The board controls the input optical power.
When the sum of the input optical power on the IN port plus 20 dB (gain) is greater than 7 or 9 dBm (maximum output power of the board, depending on the version), the board software automatically increases the attenuation of the built-in VOA to ensure that the output optical power is 7 or 9 dBm.
When the sum of the input optical power on the IN port plus 20 dB (gain) is less than 7 or 9 dBm (maximum output power of the board, depending on the version), the board software adjusts the attenuation of the built-in VOA to the minimum value to obtain an output optical power value that is as high as possible.
The TN12OBU1P1 board is a commissioning-free board. In addition, the input optical power of the board is not locked. Instead, the gain is locked to 20 dB for the board.

Other related questions:
Precautions for replacing the SCC board in the master subrack of OSN 8800
The prerequisites to replace the space SCC are: Data synchronization between the active and standby SCCs are normal; The hardware type and software version of the spare and working SCCs are the same.

Reason why the OBU1P1 board in the PID system for OptiX OSN 8800 can be used to achieve commissioning-free
In the PID system, the OBU1P1 board is configured at the receive end of a site and can automatically adjust EVOAs to ensure that the output optical power satisfies requirements, therefore achieving commissioning-free.

Precautions for commissioning multiplexed signals
During optical power commissioning of a WDM network, you need to first commission the single-wavelength optical power and then the multiplexed-wavelength optical power. This rule ensures that the attenuation of multiplexed signals is the minimum. If you commission the multiplexed-wavelength optical power first, the attenuation of multiplexed signals may be excessively large and as a result the single-wavelength optical power may fail to be commissioned, causing a commissioning failure.

Substitution of the K4XCT board for the K2XCT board on OSN 8800
The K4XCT board can completely substitute for the K2XCT board on OSN 8800.

OSN 8800 boards that support IEEE 1588v2
If external phase source access is used, the following boards support IEEE 1588v2: 1PPS+TOD time access: TN16XCH, TN16UXCM, TN52STG, TNK2STG, TN16ATE, TN52STI Service time access: TOG, TN55TQX, TN53TDX, THA, TOA, TOX, THX If internal phase transmission is used, the following boards support IEEE 1588v2: OSC mode: TN11ST2 ESC mode: TOG, TN55TQX, TN53TDX, THA, TOA, TOX, THX, LEM24, LEX4, NPO2, TN54NQ2, TN54NS3, NPO2E, TN53NQ2, TN53ND2, TN53NS2, TN57NQ2, TN57ND2, TN52ND2

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