Allied Telesis compatible SFP transceiver, application principle diagrams, related documents

If you want to know how the Allied Telesis compatible SFP transceiver works, the simple way is to find the product structure / schematics or the product use / application diagrams. And where can we find this application diagram? Actually, the function of Allied Telesis compatible SFP transceivers is same as the original SFP transceivers, basically. 

Therefore, we are able to browse the website of Allied Telesis, which may find our demand. However, if we can't find it in Allied Telesis' website, how should we do?

One way is to ask the OEM manufacturer' online customer services and tells them your requirement.  If they can't offer, just to learn and know through related documents.