Huawei OTN

Common Issues in the New Deployment of OTN Devices

During the deployment of OTN devices, many issues may occur. The following are some examples:

Issue 1: After the OUT port on the NQ2 board is connected to the M40V board, the MCA board on the MON port of the OAU board at the transmit end cannot scan the wavelength. The NQ2 board transmits optical signals normally.

Generally, this issue is caused by excessive attenuation. It is usually found in scenarios where the electrically tunable optical attenuator on M40Vis not configured, the default 15 dB attenuation is used, and an attenuator is added to the M40 port or the attenuation of the VOA on the OAU is too large.

Issue 2: When a user creates a cross-connection in the WDM Service Managementwindow for a newly deployed OTN device, the following message is displayed: Service type of the license is incorrect. Error code: 43886.

The service type of the subrack is incorrectly set, as shown in the following figure.

DWDM

Change the service type to OTN or SDH+OTN and set the cross-connect capacity to the capacity planned for the NE deployment.

Issue 3: When a user configures a port on a tributary board to a logical port, for example, 201 (clientLP1), in the WDM Service Managementwindow for a newly deployed OTN device, the following message is displayed: The channel ID is invalid. Error code: 38777.

This issue occurs when the service type of the port on the tributary board is inconsistent with that selected when the cross-connection is configured. In this case, you need to check whether the service type of the port is correct in the WDM Port Configuration window.

Issue 4: When a user adds NQ2 to M40 logical fiber connections in the signal flow diagram for a newly deployed OTN device, the following message is displayed: The operating wavelength is out of range. Error code: 39208.

The wavelength information of the NQ2 board is not set, or the band and parity parameters of the configured operating wavelength are not set on the M40 board. Therefore, you need to correctly configure the wavelength information on the WDM port.

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