Sorry for the late response, but I can speak about the FS M6200 product. We have been using the 10GOEO card for 10G DWDM/WDM on a span. The hardware works reasonably well though we had to reseat a card once
in the last 18 months or so of operation. It also seems to be a bit finicky when you first install a new card. Their support had us slot/reslot and move around a few times before things started working as expected. My biggest complaint is that the ONLY way
to manage the box is through the EMS system, which must be installed on a windows OS. It has an embedded apache server that provides the interface, so it doesn’t have to run on windows server. The EMS uses SNMP for all the configuration of the hardware itself.
We figured out how to do some basic things like change the IP using snmp, but besides, that there is no way to manage it without connectivity back to the EMS, no CLI, no internal web interface, etc.
Collin R