Hello, my friend!
OLT series products enterprise network market MIB file acquisition operation guidance:
The first of the customer is to submit the application for MIB file download to the product manager in the region. After the product manager and channel review and consent, the CONFIDENTIALITY agreement shall be signed, and the CMO organization will release the MIB file later. The product manager will download the MIB file and transfer it to the customer.

Thanks!