we have 2x 3mt DAC from mikrotik
1x GPON SFP+ from zyxel 2.5G
nothing else
I dont know if it uses that bus.
maybe the situation described here?
http://forum.mikrotik.com/t/ccr2004-with-sfp-onu-module-fail-both-psu/158227/1
Should I change kind of RB? Maybe a 1036 or 1009?