[FGSD-1022] Does FGSD-1022 compatible with 100Base-FX SFP module?

No, it does not compatible with 100Base-FX SFP module, because the mini-GBIC slot of FGSD-1022 does support 1000Base-FX SFP fiber optic module with MSA standard only. If you need a Switch could support 100Mbps SFP module, we recommend you to pick up the other model such as following.
SGSW-2840 / SGSW-2840P / SGSW-2840P4 / SGSW-2840R
SGSW-24240 / SGSW-24240R
FGSW-2624SF
SGSD-1022 / SGSD-1022P