Prerequisite
The fiber connection and network configuration must be complete.
The ECC communication must be created.
The commissioning of the optical supervisory channel must be complete.
The optical cross-connections must be configured at each station.
The receive wavelengths of Huawei 100G OTU boards have been set.
Background Information
In this example, the specifications for the hardware are as follows:
1. The G.652 fiber is used as the line optical fiber.
2. In the 40-wavelength 100G system, 1 add wavelength and 2 pass-through wavelengths are configured at the ROADM station in practice.
Procedure
Commission the optical power along the wavelength dropping direction.
1. On the U2000, adjust the EVOA attenuation for the OAU101 board to the minimum value and adjust the gain of the board to 27.5 dB, so that the input optical power of the board reaches -23.5 dB.
2. Preset the attenuation to 3.0 dB for each pass-through wavelength on the WSD9 board.
3. Set the attenuation of the VOA on the TD20 board to the minimum value to make the optical path available.
4. Fine tune the attenuation of each channel on the WSD9 board so that the input optical power of the EDFA on the TD20 board reaches the nominal value.
5. Configure the fixed optical attenuator (FOA) equipped for the OTU board, so that the input optical power of the OTU board is within the range of -13 dBm to -5 dBm.
Commission the optical power along the wavelength pass-through direction.
1. Preset the attenuation to 3.0 dB for each pass-through channel on the WSM9 board on the main optical path.
2. Preset the attenuation to the minimum value for the EVOA attached to the IN port on the OAU106 board on the main optical path (to make the optical path available), and set the board gain to 23 dB.
3. Determine that it is a coherent non-standard fiber access scenario for the transmit-end OAU106. Therefore, set the attenuation value of the EVOA on the OUT port of the OAU106 to 2.5 dB.
Commission the optical power along the wavelength adding direction.
1. Preset the attenuation of each pass-through wavelength on the WSM9 board to 5.0 dB.
2. If an EVOA is attached to the IN port of the OBU104 board, set the EVOA attenuation to the minimum value to make the optical path available.
3. Use the OPM board to scan the optical power of the OBU104 board and fine tune the attenuation for each add channel on the WSM9 board, so that the output optical power of each wavelength is close to the nominal value.
4. Preset the EVOA attenuation to 8 dB so that the difference between the AM port power and EXPI port power is within 5 dB.
5. Use the OPM board to scan the optical power of the OAU106 board and fine tune the attenuation for each pass-through channel on the WSM9 board, so that power flatness of add/pass-through wavelengths is achieved.
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