• Networking
  • which Modem router is compatible with FTTC?

The modem router you linked to is not compatible with FTTH. You need a ONT (Optical Network Terminal) modem that can either be a modem router or simply a modem (you'd have to connect a router to that ONT). The one that is used by Ogero is the Huawei EchoLife HG8141A5 ONT modem router. It's pretty good IMO, I don't know if other geeks here use a different ONT, or if Ogero allows you to get your own ONT. You could always connect your own router to it using a WAN connection if you're not satisfied, or if you want a 5ghz band for example.
FTTC is ADSL/VDSL (internet via phone/landline)
FTTH is fiber (internet via fiber cable)

Better check with your internet provider anyway