Question about AVM FTTH Router FRITZ!Box 5530, with AON SFP

This one has an AON terminal (unfortunately not described anywhere, but it used to be the only one sold in retail in Switzerland), the one from the link apparently GPON. The general chatter from the description that the 5530 can do all three technologies (yes, it's true) is unfortunately of little help, because you need the right terminal ("modem"), because all three are by no means supplied. The next challenge is to find out which technology your own provider uses, which is usually not mentioned anywhere. I was lucky that 1. AON fitted and 2. my provider has a competent and friendly second level support who gave me the information in advance.