When doing commssioning of the OSN 6800 V1R3 equipment we tried to set the wavelength in a tunable OTU board and we were unable to do so. the management system (T2000V2R7) did not show any option to perform in the WDM interface of the OTU board.
The situation was found when we tried to do the system commissioning of the new network, in the "OUT" port of the M40 we were unable to see the proper wavelength of the OTU.
We changed the default internet explorer tool from "Mozzila" (set before) to "Internet Explorer" set to solve the situation, then we were able to set the proper wavelength in the OTU board.
We figured out that the internet explorer set as default on the computer used for commissioning was diferent from the proper one (Internet Explorer) so the WEB LCT process in the T2000 local server did not allow us to perform this operation on the equipment.
Try to keep the settings of the computer used for commissioning and operating the equipments with the proper softwares for handling the network. If there is any other software installed in such computer make sure that it will not affect the proper operation of the management or other software relate to the handling of the equipments.