Hello Thorsten,
they are 100BASE-FX multimode fiber (MMF) (MT-RJ)
according to MT-RJ
The 100BASE-FX ports use 50/125- or 62.5/125-micron multimode fiber-optic cabling.
I think they are in first window 850 nm
Metro Ethernet: residential customers located within a 1.2-mile (2-km) radius
Hope to help
Giuseppe