What is the output voltage of LT4275BIDD POE

Hi Sir/Mam,

I am using LT4275BIDD POE in my design and attached schematic please can you suggest what is the output voltage of the LT4275BIDD ?

How we can set 26V on output of LT4275BIDD ?

And instead of replace the Optocouplers with FETs, Please can you suggest FET part numbers ?